cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An Alternating Minimization Algorithm with Trajectory for Direct Exoplanet Detection -- The AMAT Algorithm
Creators: name: Daglayan, Hazan
name: Vary, Simon
name: Absil, Olivier
name: Cantalloube, Faustine
name: Christiaens, Valentin
name: Gillis, Nicolas
name: Jacques, Laurent
name: Leplat, Valentin
name: Absil, P. -A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Effective image post-processing algorithms are vital for the successful direct imaging of exoplanets. Standard PSF subtraction methods use techniques based on a low-rank approximation to separate the rotating planet signal from the quasi-static speckles, and rely on signal-to-noise ratio maps to detect the planet. These steps do not interact or feed each other, leading to potential limitations in the accuracy and efficiency of exoplanet detection. We aim to develop a novel approach that iteratively finds the flux of the planet and the low-rank approximation of quasi-static signals, in an attempt to improve upon current PSF subtraction techniques. In this study, we extend the standard L2 norm minimization paradigm to an L1 norm minimization framework to better account for noise statistics in the high contrast images. Then, we propose a new method, referred to as Alternating Minimization Algorithm with Trajectory, that makes a more advanced use of estimating the low-rank approximation of the speckle field and the planet flux by alternating between them and utilizing both L1 and L2 norms. For the L1 norm minimization, we propose using L1 norm low-rank approximation, a low-rank approximation computed using an exact block-cyclic coordinate descent method, while we use randomized singular value decomposition for the L2 norm minimization. Additionally, we enhance the visibility of the planet signal using a likelihood ratio as a postprocessing step. Numerical experiments performed on a VLT/SPHERE-IRDIS dataset show the potential of AMAT to improve upon the existing approaches in terms of higher S/N, sensitivity limits, and ROC curves. Moreover, for a systematic comparison, we used datasets from the exoplanet data challenge to compare our algorithm to other algorithms in the challenge, and AMAT with likelihood ratio map performs better than most algorithms tested on the exoplanet data challenge.
description: Submitted to A&A, 20 pages, 20 figures
Blepharidatta
Creators: name: Brandão, Carlos Roberto F.
name: Feitosa, Rodrigo M.
name: Diniz, Jorge L. M.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Blepharidatta

description: Key to the identification of Blepharidatta males
(Male of B. fernandezi unknown)
1a. Petiolar node short, subrectangular to rounded (Fig. 3 B, F)..................................................... 2
1b. Petiolar node elongate, weakly differentiated (Fig. 3 D).................................. Blepharidatta conops Kempf
2a. Head rounded in full face view; first funicular segment as long as the pedicel (Fig. 3 A); petiolar node subrectangular in lateral view (Fig. 3 B)........................................................... Blepharidatta brasiliensis Wheeler
2b. Head subrectangular in full face view; first funicular segment about twice as long as the pedicel (Fig. 3E); petiolar node dor- sally rounded (Fig. 3 F).......................................................... Blepharidatta delabiei sp. n.
description: Published as part of Brandão, Carlos Roberto F., Feitosa, Rodrigo M. & Diniz, Jorge L. M., 2015, Taxonomic revision of the Neotropical Myrmicinae ant genus Blepharidatta Wheeler, pp. 33-56 in Zootaxa 4012 (1) on page 42, DOI: 10.11646/zootaxa.4012.1.2, http://zenodo.org/record/60138
The geometric classification of non-associative algebras: a survey
Creators: name: Kaygorodov, Ivan
name: Khrypchenko, Mykola
name: Páez-Guillán, Pilar
Publisher: name: arXiv
Year: 2024
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: This is a survey on the geometric classification of different varieties of algebras (nilpotent, nil-, associative, commutative associative, cyclic associative, Jordan, Kokoris, standard, noncommutative Jordan, commutative power-associative, weakly associative, terminal, Lie, Malcev, binary Lie, Tortkara, dual mock Lie, $\mathfrak{CD}$-, commutative $\mathfrak{CD}$-, anticommutative $\mathfrak{CD}$-, symmetric Leibniz, Leibniz, Zinbiel, Novikov, bicommutative, assosymmetric, antiassociative, left-symmetric, right alternative, and right commutative), $n$-ary algebras (Fillipov ($n$-Lie), Lie triple systems and anticommutative ternary), superalgebras (Lie and Jordan), and Poisson-type algebras (Poisson, transposed Poisson, Leibniz-Poisson, generic Poisson, generic Poisson-Jordan, transposed Leibniz-Poisson, Novikov-Poisson, pre-Lie Poisson, commutative pre-Lie, anti-pre-Lie Poisson, pre-Poisson, compatible commutative associative, compatible associative, compatible Novikov, compatible pre-Lie). We also discuss the degeneration level classification.
Thermal solutions of strongly magnetized disks and the hysteresis in X-ray binaries
Creators: name: Scepi, Nicolas
name: Dexter, Jason
name: Begelman, Mitchell C.
name: Marcel, Grégoire
name: Ferreira, Jonathan
name: Petrucci, Pierre-Olivier
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: X-ray binaries (XRBs) exhibit spectral hysteresis for luminosities in the range $10^{-2}\lesssim L/L_\mathrm{Edd}\lesssim 0.3$, with a hard X-ray spectral state that persists from quiescent luminosities up to $\gtrsim 0.3L_\mathrm{Edd}$, transitioning to a soft spectral state that survives with decreasing luminosities down to $\sim 10^{-2}L_\mathrm{Edd}$. We present a possible approach to explain this behavior based on the thermal properties of a magnetically arrested disk simulation. By post-processing the simulation to include radiative effects, we solve for all the thermal equilibrium solutions as the accretion rate, $\dot{M}$, varies along the XRB outburst. For an assumed scaling of the disk scale height and accretion speed with temperature, we find that there exists two solutions in the range of $ 10^{-3}\lesssim\dot{M}/\dot{M}_{\rm Eddington} \lesssim 0.1$ at $r=8\:r_g$ ($ 4\times10^{-2}\lesssim\dot{M}/\dot{M}_{\rm Eddington} \lesssim 0.5$ at $r=3\:r_g$) : a cold, optically thick one and a hot, optically thin one. This opens the possibility of a natural thermal hysteresis in the right range of luminosities for XRBs. We stress that our scenario for the hysteresis does not require to invoke the strong-ADAF principle nor does it require for the magnetization of the disk to change along the XRB outburst. In fact, our scenario requires a highly magnetized disk in the cold, soft state to reproduce the soft-to-hard state transition at the right luminosities. Hence, a prediction of our scenario is that there should be a jet, although possibly very weakly dissipative, in the soft state of XRBs. We also predict that if active galactic nuclei (AGN) have similar hysteresis cycles and are strongly magnetized, they should undergo a soft-to-hard state transition at much lower $L/L_\mathrm{Edd}$ than XRBs.
description: 15 pages, 10 Figures. Accepted for publication in A&A
Cremnomymar sagittifer
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Cremnomymar
Cremnomymar sagittifer

description: Cremnomymar sagittifer (Fidalgo, 1982)
Parapolynema sagittifer Fidalgo, 1982: 98; holotype ♀ (MLPA). TL: Argentina, Buenos Aires, José C. Paz.
Cremnomymar sagittifer: Triapitsyn, 2024: 26 (generic transfer, list), 28 (key), 33 (description).
Distribution. Argentina, Brazil?
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2024, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Neotropical region, pp. 1-263 in Zootaxa 5557 (1) on page 61, DOI: 10.11646/zootaxa.5557.1.1, http://zenodo.org/record/14596637
Moderate Physical Perspectivalism
Creators: name: Adlam, Emily
Publisher: name: arXiv
Year: 2024
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: Recent developments in foundations of physics have given rise to a class of views suggesting that physically meaningful descriptions must always be relativized to a physical perspective. In this article I distinguish between strong physical perspectivalism, which maintains that all facts must be relativized to a perspective, and moderate physical perspectivalism, which maintains that all empirically meaningful descriptions must be relativized to a perspective. I argue that both scientific evidence and philosophical considerations support moderate physical perspectivalism over strong physical perspectivalism. In particular, motivations connected to epistemic humility and the social nature of science are more compatible with the moderate approach.
Cremnomymar tucumanum
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Cremnomymar
Cremnomymar tucumanum

description: Cremnomymar tucumanum (Fidalgo, 1991)
Parapolynema tucumanum Fidalgo, 1991: 153; holotype ♀ (MLPA). TL: Argentina, La Rioja, Anillaco.
Cremnomymar tucumanum: Triapitsyn, 2024: 26 (generic transfer, list), 28 (key), 39 (description).
Distribution. Argentina.
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2024, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Neotropical region, pp. 1-263 in Zootaxa 5557 (1) on page 61, DOI: 10.11646/zootaxa.5557.1.1, http://zenodo.org/record/14596637
Adelopsis bilobulata Salgado 2010
Creators: name: Peck, Stewart B.
name: Gnaspini, Pedro
name: Newton, Alfred F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Leiodidae
Adelopsis
Adelopsis bilobulata

description: A. bilobulata Salgado, 2010c: 223
(assignment to group soacha); Gnaspini & Peck, 2019: 19 (assignment to group and subgroup).
Holotype male in QCAZ.
Type locality: 1.75 km SW Baeza, 00º28’43” S 77º53’55” W, 2260 m, Napo Province. Ecuador.
Distribution: Ecuador: Napo Province: known only from type locality.
description: Published as part of Peck, Stewart B., Gnaspini, Pedro & Newton, Alfred F., 2020, Updated catalog and generic keys of the Leiodidae (Insecta: Coleoptera) of the Neotropical region (" Latin America ": Mexico, the West Indies, and Central and South America), pp. 1-114 in Zootaxa 4741 (1) on page 45, DOI: 10.11646/zootaxa.4741.1.1, http://zenodo.org/record/3772899
Detonidae Budde-Lund 1904
Creators: name: López-Orozco, Carlos Mario
name: Carpio-Díaz, Yesenia M.
name: Borja-Arrieta, Ricardo
name: Navas-S, Gabriel R.
name: Campos-Filho, Ivanklin Soares
name: Taiti, Stefano
name: Mateos, Mariana
name: Olazaran, Alexandra
name: Caballero, Isabel C.
name: Jotty, Karick
name: Gómez-Estrada, Harold
name: Hurtado, Luis A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Detonidae

description: Family Detonidae Budde-Lund, 1904
Remarks
The family Detonidae Budde-Lund, 1904 comprises 39 littoral species in the genera Armadilloniscus Uljanin, 1875 (32 spp.), Deto Guérin-Méneville, 1836 (5 spp.) and Detonella Lohmander, 1927 (2 spp.), including two dubious species, Armadilloniscus minutus Uljanin, 1875 and Deto spinicornis Brandt, 1851 (Schultz 1984; Paoletti & Stinner 1989; Taiti & Ferrara 1989; Schmidt 2002; Schmalfuss 2003; Schmidt & Leistikow 2004; WoRMS 2020b). The family can be characterized by animals having a clinger habitus (sensu Schmalfuss 1984), cephalon with well-developed lateral lobes, dorsal surface more or less tuberculated or with longitudinal ridges, exopods of pleopods 1–5 without respiratory structures and lateral margins covered with thin setae conferring a fringe-like appearance (see Taiti & Ferrara 1989; Schmidt 2002).
Recently, Reinoso-Flórez et al. (2016) recorded the family from Páramo de Estambul (Tolima), Colombia. However, after the re-examination of the material deposited at Colección Zoológica de la Universidad del Tolima (CZUT-IT 1423–1426, see Reinoso-Flórez et al. 2016), the specimens belong to the families Styloniscidae and Philosciidae, and therefore, our work constitutes the first record of the family in the country.
description: Published as part of López-Orozco, Carlos Mario, Carpio-Díaz, Yesenia M., Borja-Arrieta, Ricardo, Navas-S, Gabriel R., Campos-Filho, Ivanklin Soares, Taiti, Stefano, Mateos, Mariana, Olazaran, Alexandra, Caballero, Isabel C., Jotty, Karick, Gómez-Estrada, Harold & Hurtado, Luis A., 2022, A glimpse into a remarkable unknown diversity of oniscideans along the Caribbean coasts revealed on a tiny island, pp. 1-50 in European Journal of Taxonomy 793 on page 19, DOI: 10.5852/ejt.2022.793.1643, http://zenodo.org/record/6037892
Dicopomorpha macrocephala Ogloblin 1955
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Dicopomorpha
Dicopomorpha macrocephala

description: Dicopomorpha macrocephala Ogloblin, 1955
Dicopomorpha macrocephala Ogloblin, 1955c: 387; holotype ♀ (MLPA). TL: Argentina, Misiones, San Ignacio. De Santis, 1967: 102 (catalogue, Argentina); Yoshimoto, 1990: 27 (list); Loiácono et al., 2005: 10 (type information); Luft Albarracin et al., 2009: 7 (list, distribution in Argentina); Luft Albarracin et al., 2014: 137 (list).
Distribution. Argentina.
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2024, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Neotropical region, pp. 1-263 in Zootaxa 5557 (1) on page 62, DOI: 10.11646/zootaxa.5557.1.1, http://zenodo.org/record/14596637
Dicopomorpha stramineus
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Dicopomorpha
Dicopomorpha stramineus

description: Dicopomorpha stramineus (Ogloblin, 1955)
Dicopulus stramineus Ogloblin, 1955c: 394; holotype ♀ (MLPA). TL: Argentina, Misiones, Loreto. De Santis, 1967: 102 (catalogue, Argentina).
Dicopomorpha stramineus: Yoshimoto, 1990: 27 (list, de facto generic transfer); Luft Albarracin et al., 2009: 7 (list, distribution in Argentina); Luft Albarracin et al., 2014: 137 (list).
Dicopomorpha stamineus [sic]: Yoshimoto, 1990: 27 (list).
Dicopulus stramineus: Loiácono et al., 2005: 10 (type information).
Distribution. Argentina.
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2024, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Neotropical region, pp. 1-263 in Zootaxa 5557 (1) on page 62, DOI: 10.11646/zootaxa.5557.1.1, http://zenodo.org/record/14596637
Cheilolejeunea quinquecarinata Ye 2015
Creators: name: Gil-Novoa, Jorge Enrique
name: Costa, Denise Pinheiro
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Marchantiophyta
Jungermanniopsida
Porellales
Lejeuneaceae
Cheilolejeunea
Cheilolejeunea quinquecarinata

description: 24. Cheilolejeunea quinquecarinata (Schuster) Ye et al. (2015: 326).—
Aureolejeunea quinquecarinata Schuster (1978: 429).
Type:— VENEZUELA. Tachira: Parque Nacional El Tamá, Base of Pico de Bandeiras; between Páramo and Mirador, R.M. Schuster & L. Ruíz-Terán 76-1921d (holotype F!).— Fig. 14R–Y.
Plants brown light, robust, 1.2–1.6 mm wide. Stems 110–150 µm in diameter in cross section. Ventral merophytes 2–3(–4) cells wide. Leaves imbricate, orbicular to ovate; leaf lobe ovate, strongly convex, especially at the apex, 900–1150 × 600–750 µm; margin entire, apex rounded; cells hexagonal elongated, mammillose on the dorsal side, conspicuous trigones; basal cells 15–20 × 10–14 µm, median cells 16–22x 10–16 µm, marginal cells 11–16 × 10–16 µm. Lobules rectangular, 1/3–1/2, free margin flat; first tooth generally not easily observed, formed by one cell, second tooth triangular, 1–3 cells long, 1–2 cells wide at the base; keel slightly curved. Underleaves contiguous to imbricate, orbicular to slightly reniform, 600–630 × 650–700 µm, 4–5.5 × stem width, undivided, margin slightly recurved, insertion U-shaped. Autoicous. Androecia on the principal stem or branches, 3–4 pairs of bracts. Gynoecia with 1–2 lejeuneoid innovations. Perianth with 5 keels, beak short. Vegetative reproduction unknown.
Distribution and habitat:—Neotropical, occurring in Dominican Republic, northern South America, and the Guayana Highlands (Bastos & Gradstein 2020, Schäfer-Verwimp et al. 2013). The species grows in the study area as an epiphyte on the branches of shrubs, in upper montane rainforest, grass páramos, and shrub and cushion páramos, between 2260–4100 m, in the Cauca province of the Pacific dominion, and in the Páramo province of SATZ (Fig. 16).
Notes: —The species is characterized by the robust, light brown plants with convex leaves with mammillose cells, ventral merophyte 2–3 cells wide, lobules rectangular and underleaves orbicular to reniform, with margins slightly recurved. Although the species is considered to occur almost exclusively in páramos vegetation, Schäfer-Verwimp et al. (2013) recorded it at 2500 m in Ecuador and here is recorded from 2268 m in Colombia.
Specimens examined:— COLOMBIA. Risaralda: Santa Rosa de Cabal, 4°48’09”N, 75°30’01”W, 3730 m, 22 July 1980, Aguirre-C, 1365 (COL). Santander: El Hato, 6°36’10.5”N, 73°21’38,1”W, 2268 m, 25 August 2017, Cuta 145, 507 (UPTC).
description: Published as part of Gil-Novoa, Jorge Enrique & Costa, Denise Pinheiro, 2023, Synopsis of the species of Cheilolejeunea (Marchantiophyta, Lejeuneaceae) in the Pacific dominion and Páramo province of tropical America, pp. 73-120 in Phytotaxa 587 (2) on page 105, DOI: 10.11646/phytotaxa.587.2.1, http://zenodo.org/record/7731813
SUT BEZI OʻSMALARINING NUR TASHXISI: RADIOLOGIYA TEXNOLOGIYASI YUTUQLARI
Creators: name: Nishanova, Y.X.
name: To'xtamatov, I.Z.
name: Fayzullayeva, M.B.
Publisher: name: Zenodo
Year: 2025

description: Ayollarda uchraydigan o’sma kasalliklarida sut bezi o’smalari yuqori o’rinni egallaydi. Davolash chora-tadbirlari mavjud bo’lsa-da, erta aniqlash yuqori samaradorlikka ega. Ultratovush va rentgen orqali ko’rish imkoniyatlari cheklangan, shu sababli radiologiya sohasi yanada mukammal texnologiyalarni talab qiladi.
Chatting with Bots: AI, Speech Acts, and the Edge of Assertion
Creators: name: Williams, Iwan
name: Bayne, Tim
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This paper addresses the question of whether large language model-powered chatbots are capable of assertion. According to what we call the Thesis of Chatbot Assertion (TCA), chatbots are the kinds of things that can assert, and at least some of the output produced by current-generation chatbots qualifies as assertion. We provide some motivation for TCA, arguing that it ought to be taken seriously and not simply dismissed. We also review recent objections to TCA, arguing that these objections are weighty. We thus confront the following dilemma: how can we do justice to both the considerations for and against TCA? We consider two influential responses to this dilemma - the first appeals to the notion of proxy-assertion; the second appeals to fictionalism - and argue that neither is satisfactory. Instead, reflecting on the ontogenesis of assertion, we argue that we need to make space for a category of proto-assertion. We then apply the category of proto-assertion to chatbots, arguing that treating chatbots as proto-assertors provides a satisfactory resolution to the dilemma of chatbot assertion.
Dicopus Enock 1909
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Dicopus

description: DICOPUS Enock, 1909
(Figs 114–118)
Dicopus Enock, 1909: 455. Type species: Dicopus minutissimus Enock, 1909, by monotypy. See Huber et al. (2020) for generic synonyms and their type species.
Diagnosis. Face with toruli about their own height from transverse trabecula (Fig. 114a); vertex separated from occiput by a medially divided vertexal trabecula (Fig. 114b); mandibles when closed pointing ventrally, not overlapping medially (Fig. 114a), each with one short and one long tooth; funicle 7-segmented with fu 2 about equal to fu 1 or fu 3 (Fig. 115); fore wing extremely narrow, the posterior margin concave, with narrowest point about one venation length distal to venation, then distinctly widening to apex (Fig. 116); hind wing narrow for about 4 venation lengths beyond hamuli then becoming uniformly wider to apex (Fig. 116); metasoma with genitalia short, in about apical third.
Remarks. Dicopus belongs to the Alaptus group of genera. It is most similar to Dicopomorpha in having the funicle clearly 7-segmented, but the fore wing of Dicopus is narrower and the head shape and mandibles have one short and one long tooth and do not cross medially. Male flagellum 10-segmented.
Neotropical hosts. Psocodea.
Important reference. Huber et al. (2020).
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2024, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Neotropical region, pp. 1-263 in Zootaxa 5557 (1) on page 62, DOI: 10.11646/zootaxa.5557.1.1, http://zenodo.org/record/14596637
Paleographical analysis of letter D
Creators: name: Marichal, Robert
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2015

description: vue 21
description: Morphological study on the letter D : collection of samples from inscriptions and papyri, and analysis of paleographical aspects.
description: Source: 4MAR_1_1.3.1-5
description: created: n. d.
CO-CAVITY project: Molecular gas and star formation in void galaxies
Creators: name: Rodríguez, M. I.
name: Lisenfeld, U.
name: Puertas, S. Duarte
name: Espada, D.
name: Domínguez-Gómez, J.
name: Sánchez-Portal, M.
name: Bongiovanni, A.
name: Alcázar-Laynez, M.
name: Argudo-Fernández, M.
name: Bidaran, B.
name: De Daniloff, S. B.
name: Falcón-Barroso, J.
name: Florido, E.
name: García-Benito, R.
name: Jimenez, A.
name: Kreckel, K.
name: Peletier, R. F.
name: Pérez, I.
name: Ruiz-Lara, T.
name: Sánchez-Menguiano, L.
name: Torres-Ríos, G.
name: Villalba-González, P.
name: Verley, S.
name: Zurita, A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Cosmic voids, distinguished by their low-density environment, provide a unique opportunity to explore the interplay between the cosmic environment and the processes of galaxy formation and evolution. Data on the molecular gas has been scarce so far. In this paper, we continue previous research done in the CO-CAVITY pilot project to study the molecular gas content and properties in void galaxies to search for possible differences compared to galaxies that inhabit denser structures. We observed at the IRAM 30 m telescope the CO(1-0) and CO(2-1) emission of 106 void galaxies selected from the CAVITY survey. Together with data from the literature, we obtained a sample of 200 void galaxies with CO data. We conducted a comprehensive comparison of the specific star formation rate (sSFR = SFR/M$_*$), the molecular gas fraction (MH$_2$/M$_*$), and the star formation efficiency (SFE = SFR/MH$_2$) between the void galaxies and a comparison sample of galaxies in filaments and walls, selected from the xCOLD GASS survey. We found no statistically significant difference between void galaxies and the comparison sample in the molecular gas fraction as a function of stellar mass for galaxies on the star-forming main sequence (SFMS). However, for void galaxies, the SFE was found to be constant across all stellar mass bins, while there is a decreasing trend with M$_*$ for the comparison sample. Finally, we found some indications for a smaller dynamical range in the molecular gas fraction as a function of distance to the SFMS in void galaxies. Overall, our analysis finds that the molecular gas properties of void galaxies are not very different from denser environments. The physical origin of the most significant difference that we found - a constant SFE as a function of stellar mass in void galaxies - is unclear and requires further investigation and higher-resolution data.
description: 26 pages, 9 figures. Accepted for publication in A&A
Dicopus citri Mercet 1912
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Dicopus
Dicopus citri

description: Dicopus citri Mercet, 1912
Dicopus citri Mercet, 1912: 335; syntypes ♀♀ (MLPA. MNCN, USNM). TL: Spain, Valencia. De Santis, 1971: 203 (taxonomy, bionomics, Argentina); Yoshimoto, 1990: 25 (list); Luft Albarracin et al., 2009: 7 (list, distribution in Argentina); Luft Albarracin et al., 2014: 137 (list), Triapitsyn, 2015c: 8 (Argentina).
Distribution. Argentina.
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2024, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Neotropical region, pp. 1-263 in Zootaxa 5557 (1) on page 63, DOI: 10.11646/zootaxa.5557.1.1, http://zenodo.org/record/14596637
Armadilloniscus caraibicus Paoletti & Stinner 1989
Creators: name: López-Orozco, Carlos Mario
name: Carpio-Díaz, Yesenia M.
name: Borja-Arrieta, Ricardo
name: Navas-S, Gabriel R.
name: Campos-Filho, Ivanklin Soares
name: Taiti, Stefano
name: Mateos, Mariana
name: Olazaran, Alexandra
name: Caballero, Isabel C.
name: Jotty, Karick
name: Gómez-Estrada, Harold
name: Hurtado, Luis A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Detonidae
Armadilloniscus
Armadilloniscus caraibicus

description: Armadilloniscus caraibicus Paoletti & Stinner, 1989
Figs 1, 2D, 9
Armadilloniscus caraibicus Paoletti & Stinner, 1989: 73, figs 6–12.
Additional reference
Schmidt (2002).
Material examined
COLOMBIA – Bolívar, Cartagena de Indias, Islas del Rosario, Isla Grande • 2 ♀♀; Paraíso Secreto; 10°10′15.9″ N, 75°44′38.8″ W; 4 Apr. 2018; C.M. López-Orozco, R. Borja-Arrieta and K. Meza leg.; CUDC-CRU 189 • 4 ♂♂, 10 ♀♀; same locality as for preceding; 6 Sep. 2017; C.M. López-Orozco, Y.M. Carpio-Díaz and R. Borja-Arrieta leg.; CUDC-CRU 190 • 1 ♀; Caño Ratón; 10°10′33.4″ N, 75°44′52.4″ W; 24 Nov. 2017; same collectors as for preceding; CUDC-CRU 191 • 2 ♀♀; 10°10′42.6″ N, 75°44′52.6″ W; same collection data as for preceding; CUDC-CRU 192.
Remarks
Paoletti & Stinner (1989) described A. caraibicus from Parque Marrocoy, Falcón State, Venezuela. In the description, no sexual dimorphism was noted in the dorsal ornamentation. However, the male specimens show four dorsal tubercles on pleonite 2, while females have only two (see Fig. 9 and Paoletti & Stinner 1989: fig. 11).
Distribution
Venezuela: Coralline cays of the Parque Natural Morrocoy (Paoletti & Stinner 1989), and north coast of the Península de Paria (Schmidt 2001). First record for Colombia.
description: Published as part of López-Orozco, Carlos Mario, Carpio-Díaz, Yesenia M., Borja-Arrieta, Ricardo, Navas-S, Gabriel R., Campos-Filho, Ivanklin Soares, Taiti, Stefano, Mateos, Mariana, Olazaran, Alexandra, Caballero, Isabel C., Jotty, Karick, Gómez-Estrada, Harold & Hurtado, Luis A., 2022, A glimpse into a remarkable unknown diversity of oniscideans along the Caribbean coasts revealed on a tiny island, pp. 1-50 in European Journal of Taxonomy 793 on pages 19-20, DOI: 10.5852/ejt.2022.793.1643, http://zenodo.org/record/6037892
Latin Majuscule Writing with semicursive hand: P. Herc. 394
Creators: name: Marichal, Robert
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2015

description: "Annotations and bibliographical references on Tigranes, king of Armenia (I sec. BC). - Physical description of the 10 frames constituting P.Herc. 394; palaeographic description and drawing of the letters. Transcriptions of several fragments; drawings of some fragments (by Marichal). On the upper right corner of each sheet containing the transcription the indications 'micro' and 'Vu 54' are written with two different inks (light pink; dark pink); corrections and (later?) remarks with a different ink (light green). Photographs of the drawings. Photographs of the papyrus (sometimes with the date on the back, or with Marichal's indication of the number of bobin). - Below the number of the papyrus the indication 'Majuscule droite' is written by the same hand (Marichal?)"
description: vue 12
description: Source: 4MAR_9_2_5-15.4
description: Relation: 4MAR_42_4-4, 4MAR_42_4-7
description: created: n.d., 1957
The Formation of Black Holes in Non-interacting, Isolated Binaries. Gaia Black Holes as Calibrators of Stellar Winds From Massive Stars
Creators: name: Kruckow, Matthias U.
name: Andrews, Jeff J.
name: Fragos, Tassos
name: Holl, Berry
name: Bavera, Simone S.
name: Briel, Max
name: Gossage, Seth
name: Kovlakas, Konstantinos
name: Rocha, Kyle A.
name: Sun, Meng
name: Srivastava, Philipp M.
name: Xing, Zepei
name: Zapartas, Emmanouil
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context. The black holes discovered using Gaia, especially Gaia BH1 and BH2, have low mass companions of solar-like metallicity in wide orbits. For standard isolated binary evolution formation channels including interactions such an extreme mass ratio is unexpected; especially in orbits of hundreds to thousands of days. Aims. Here, we investigate a non-interacting formation path for isolated binaries to explain the formation of Gaia BH1 and BH2. Methods. We use single star models computed with MESA to constrain the main characteristics of possible progenitors of long-period black hole binaries like Gaia BH1 and BH2. Then, we incorporate these model grids into the binary population synthesis code POSYDON, to explore whether the formation of the observed binaries at solar metallicity is indeed possible. Results. We find that winds of massive stars ($\gtrsim 80\,M_\odot$), especially during the Wolf-Rayet phase, tend to cause a plateau in the initial stellar mass to final black hole mass relation (at about $13\,M_\odot$ in our default wind prescription). However, stellar winds at earlier evolutionary phases are also important at high metallicity, as they prevent the most massive stars from expanding ($<100\,R_\odot$) and filling their Roche lobe. Consequently, the strength of the applied winds affects the range of the final black hole masses in non-interacting binaries, making it possible to form systems similar to Gaia BH1 and BH2. Conclusions. We deduce that wide binaries with a black hole and a low mass companion can form at high metallicity without binary interactions. There could be hundreds of such systems in the Milky Way. The mass of the black hole in binaries evolved through the non-interacting channel can potentially provide insights into the wind strength during the progenitors evolution.
description: 8+4 pages, 6+6 figures, resubmitted to A&A
Elacatophora apion Jaloszynski
Creators: name: Jałoszyński, Paweł
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Elacatophora
Elacatophora apion

description: Elacatophora apion (Jałoszyński)
Elacatophora apion (Jałoszyński, 2004); Jałoszyński (2008). Borneosabahia apion Jałoszyński, 2004: 357, figs 26, 30, 39–41.
Distribution: Malaysia: Fraser's Hill.
description: Published as part of Jałoszyński, Paweł, 2016, Euconnus malakkanus Franz transferred to Elacatophora Schaufuss (Coleoptera, Staphylinidae, Scydmaeninae), pp. 195-200 in Zootaxa 4114 (2) on page 198, DOI: 10.11646/zootaxa.4114.2.9, http://zenodo.org/record/266317
Elacatophora dissimilis Jaloszynski
Creators: name: Jałoszyński, Paweł
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Elacatophora
Elacatophora dissimilis

description: Elacatophora dissimilis (Jałoszyński)
Elacatophora dissimilis (Jałoszyński, 2004); Jałoszyński (2008). Borneosabahia dissimilis Jałoszyński, 2004: 361, figs 28, 32, 45–47.
Distribution: Malaysia: Sabah.
description: Published as part of Jałoszyński, Paweł, 2016, Euconnus malakkanus Franz transferred to Elacatophora Schaufuss (Coleoptera, Staphylinidae, Scydmaeninae), pp. 195-200 in Zootaxa 4114 (2) on page 198, DOI: 10.11646/zootaxa.4114.2.9, http://zenodo.org/record/266317
Detection of faculae in the transit and transmission spectrum of WASP-69b
Creators: name: de la Roche, D. J. M. Petit dit
name: Chakraborty, H.
name: Lendl, M.
name: Kitzmann, D.
name: Pietrow, A. G. M.
name: Akinsanmi, B.
name: Boffin, H. M. J.
name: Cubillos, Patricio E.
name: Deline, A.
name: Ehrenreich, D.
name: Fossati, L.
name: Sedaghati, E.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context: Transmission spectroscopy is a powerful tool for understanding exoplanet atmospheres. At optical wavelengths, it makes it possible to infer the composition and the presence of aerosols in the atmosphere. However, unocculted stellar activity can result in contamination of atmospheric transmission spectra by introducing spurious slopes and molecular signals.
 Aims: We aim to characterise the atmosphere of the transiting exoplanet WASP-69b, a hot Jupiter orbiting an active K star, and characterise the host star's activity levels. Methods: We obtained three nights of spectrophotometric data with the FORS2 instrument on the VLT, covering a wavelength range of 340-1100 nm. We performed retrievals on the full spectrum with combined stellar activity and planet atmosphere models.
 Results: We directly detect a facula in the form of a hot spot crossing event in one of the transits and indirectly detect unocculted faculae through an apparently decreasing radius towards the blue end of the transmission spectrum. We determine a facula temperature of $ΔT=+644^{+427}_{-263}$ K for the former and a stellar coverage fraction of around 30% with a temperature of $ΔT=+231\pm72$ K for the latter. The planetary atmosphere is best fit with a high-altitude cloud deck at 1.4 mbar that mutes atomic and molecular features. We find indications of water and ammonia with $log(H_2O)=-2.01^{+0.54}_{-0.86}$ and $log(NH_3)=-3.4^{+0.96}_{-5.20} respectively and place 3$σ$ upper limits on TiO ($10^{-7.65}$) and K ($10^{-7}$). Conclusions. The simultaneous multi-wavelength observations allow us to break the size-contrast degeneracy for facula-crossings, meaning we can obtain temperatures for both the directly and indirectly detected faculae, which are consistent with each other.
description: Accepted in A\&A, 18 pages, 10 figures
title: Activité du port de Saint-Malo – 1713 – Barfleur
Creators: name: :Unkn
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2024
Subjects: subject: matériaux de construction

description: Cette fiche est issue de l’enquête menée par Jean Delumeau sur l’activité du port de Saint-Malo au 17e et 18e siècle. Cette fiche correspond à l’activité de l’année 1713 avec le port "Barfleur"
description: Marchandises arrivées à Saint-Malo : bois à merrain
description: Catégories de marchandises arrivées à Saint-Malo : matériaux de construction
description: Coverage: Petit cabotage
description: Bibliographic citation: JEZEQUEL, Yves. Les Activités du port de Saint-Malo au cours des années 1712-1713. DES : Histoire : Rennes, s.d. (Bibliothèque François-Lebrun, 1018/1-2)
description: Bibliographic citation: ROUYER, Maryvonne. Documents sur le commerce malouin en 1713 et 1727. DES : Histoire : Rennes, 1963 (Bibliothèque François-Lebrun, MH 1019)
description: date: Date de numérisation : 2021 à 2023
description: created: Années 1950-1960
Elacatophora euconnoides Jaloszynski
Creators: name: Jałoszyński, Paweł
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Elacatophora
Elacatophora euconnoides

description: Elacatophora euconnoides Jałoszyński
Elacatophora euconnoides Jałoszyński, 2015: 144, figs 1–4.
Distribution: Malaysia: Cameron Highlands.
description: Published as part of Jałoszyński, Paweł, 2016, Euconnus malakkanus Franz transferred to Elacatophora Schaufuss (Coleoptera, Staphylinidae, Scydmaeninae), pp. 195-200 in Zootaxa 4114 (2) on page 198, DOI: 10.11646/zootaxa.4114.2.9, http://zenodo.org/record/266317
Cheilolejeunea schiavoneana Reiner & Gradstein 2017
Creators: name: Gil-Novoa, Jorge Enrique
name: Costa, Denise Pinheiro
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Marchantiophyta
Jungermanniopsida
Porellales
Lejeuneaceae
Cheilolejeunea
Cheilolejeunea schiavoneana

description: 27. Cheilolejeunea schiavoneana Reiner & Gradstein (2017: 326).
Type:— COLOMBIA. Risaralda: western side of the Cordillera Occidental, municipio Mistrato, along the trail from Jeguadas to Puerto de Oro, ca. 5°45’N, 76°01’W, on canopy branches in submontane rainforest, 1200 m, 27 July 1992, S. R. Gradstein 8591 (holotype COL!; isotype GOET).— Fig. 17K–Q.
Plants yellowish green to light brown, 1.5–2.4 mm wide. Stems in cross section 150–200 µm in diameter. Ventral merophytes 3–6 cells wide. Leaves imbricate, ovate orbicular, flat, 260–380 × 340–430 µm, margin entire, apex rounded, dorsal and ventral margin curves; inconspicuous trigones; basal cells 18–30 × 20–38 µm, median cells 14– 25 × 25–42 µm, marginal cells 12–18 × 112–20 µm. Lobules ovate, ca. 1/5 of leaf length, free margin involute. Underleaves distant, orbicular to ovate, 320–470 × 350–550 µm, 2–3 × stem width, bifid to 1/2–1/3, with a V-shaped sinus, margin entire, base cuneate to rounded. Androecia and gynoecia not seen. Vegetative reproduction by caducous leaf lobes produced on upright flagelliform shoots with densely imbricate underleaves and with rhizoids on the leaf margins.
Distribution and habitat:—An endemic species of Western cordillera of Colombia, known only from the type collection. This species grows on canopy branches, in lower montane rainforest at 1200 m (Gradstein & ReinerDrehwald 2017), in the Cauca province of the Pacific dominion (Fig. 18).
Notes:—Characterized by the relatively robust plants (1.5–2.4 mm wide) with orbicular leaves, ventral merophyte 3–6 cells wide, underleaves 2–3 × stem width, and vegetative reproduction by caducous leaf lobes produced on upright flagelliform shoots and with rhizoids on their margins. Male and female structures are unknown. Because it grows in tree canopies, the species may have been overlooked.
This species is considered here as Data Deficient-new (DD-n) (Sérgio et al. 2007, UCN 2001), and we recommend increased sampling in tree canopies in the western cordillera of Colombia.
description: Published as part of Gil-Novoa, Jorge Enrique & Costa, Denise Pinheiro, 2023, Synopsis of the species of Cheilolejeunea (Marchantiophyta, Lejeuneaceae) in the Pacific dominion and Páramo province of tropical America, pp. 73-120 in Phytotaxa 587 (2) on page 109, DOI: 10.11646/phytotaxa.587.2.1, http://zenodo.org/record/7731813
Entrichopteris Yoshimoto 1990
Creators: name: Huber, John T.
name: Read, Jennifer D.
name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Entrichopteris

description: ENTRICHOPTERIS YOSHIMOTO, 1990
(Figs 119–123)
Entrichopteris Yoshimoto, 1990: 62. Type species: Entrichopteris eberhardi Yoshimoto, 1990, by original designation.
Diagnosis. Face without subantennal sulcus ventral to each torulus and without a pit medially next to each torulus (Fig. 119a); toruli separated by just over their own height from transverse trabecula; propleura widely separated from each other anterior to prosternum; fore wing with two distinct, dark transverse bands and fairly long discal setae as well as long, straggly marginal setae (Fig. 121); entire venation very close to anterior margin of wing (costal cell extremely narrow), parastigma with short, inconspicuous proximal, and distal macrochetae and marginal vein absent (Fig. 121); hind wing strongly curved (Fig. 121); propodeum apparently without median carina except a short one just dorsal to petiole (Fig. 122); petiole attached posteriorly apparently to gt 1.
Remarks. Entrichopteris belongs to the Polynema group of genera. The fore wing with long, unkempt marginal setae, two wide transverse dark bands with fairly long suberect setae and strongly curved hind wing are unique.
Neotropical hosts. Unknown.
Distribution. Several countries in Central America and northern South America (CNC, UCRC).
Important reference. Yoshimoto (1990).
description: Published as part of Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2024, Illustrated key to the genera and catalogue of Mymaridae (Hymenoptera) in the Neotropical region, pp. 1-263 in Zootaxa 5557 (1) on page 63, DOI: 10.11646/zootaxa.5557.1.1, http://zenodo.org/record/14596637
Annotations, photos and drawings of P.Leid. inv. Lat. 2589.
Creators: name: Bishoff, Bernhard
name: Marichal, Robert
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2015

description: vue 84
description: Annotations. Drawings, notes (mostly bibliographical and palaeographical) and and annotated photos towards of P. Leid. inv. Lat. 2589. - Letter from Bernhard Bishoff. - Photos, annotations, drawings and palaeographical analysis of the same payprus. - Letter from the Bibliotheek der Rijksuniversiteit te Leiden.
description: Source: 4MAR_19_3.1-12
description: Relation: Bernhard Bischoff
description: Coverage: Planegg##Munich##Rapenbourg##Leiden
description: created: n. d., January-June 1956
A tell-tale tracer for externally irradiated protoplanetary disks: comparing the [CI] 8727 A line and ALMA observations in proplyds
Creators: name: Aru, Mari-Liis
name: Mauco, Karina
name: Manara, Carlo F.
name: Haworth, Thomas J.
name: Ballering, Nick
name: Boyden, Ryan
name: Campbell-White, Justyn
name: Facchini, Stefano
name: Rosotti, Giovanni P.
name: Winter, Andrew
name: Miotello, Anna
name: McLeod, Anna F.
name: Robberto, Massimo
name: Petr-Gotzens, Monika G.
name: Ballabio, Giulia
name: Vicente, Silvia
name: Ansdell, Megan
name: Cleeves, L. Ilsedore
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The evolution of protoplanetary disks in regions with massive OB stars is influenced by externally driven winds that deplete the outer parts of disks. These winds have previously been studied via forbidden oxygen emission lines, which also arise in isolated disks in low-mass star forming-regions (SFRs) with weak external UV fields in photoevaporative or magnetic (internal) disk winds. It is crucial to determine how to disentangle external winds from internal ones. Here, we report a proxy for unambiguously identifying externally driven winds with a forbidden line of neutral atomic carbon, [C i] 8727 A. We compare for the first time the spatial location of the emission in the [O i] 5577 A, [O i] 6300 A, and [C i] 8727 A lines traced by VLT/MUSE-NFM, with the ALMA Band 7 continuum disk emission in a sample of 12 proplyds in the Orion Nebula Cluster (ONC). We confirm that the [O i] 5577 A emission is co-spatial with the disk emission, whereas the [O i] 6300 A is emitted both on the disk surface and on the ionization front of the proplyds. We show for the first time that the [C i] 8727 A line is also co-spatial with the disk surface in proplyds, as seen in the MUSE and ALMA data comparison. To verify whether the [C i] 8727 A line is detected in regions where external photoevaporation is not expected, we examine VLT/X-Shooter spectra for young stars in low-mass SFRs. Although the [O i] lines are well detected in all these targets, there is <<10% detection rate in the case of the [C i] 8727 A line. This number increases substantially to a ~40% detection rate in sigma-Orionis, a region with intermediate UV radiation. The spatial location of the [C i] 8727 A line emission and the lack of its detection in isolated disks in low-mass SFRs strongly suggest that this line is a tell-tale tracer of externally driven photoevaporative winds, which agrees with recent excitation models.
description: Accepted to A&A on October 25, 2024
H$_{2}$-H$_{2}$O demixing in Uranus and Neptune: Adiabatic structure models
Creators: name: Amoros, Marina Cano
name: Nettelmann, Nadine
name: Tosi, Nicola
name: Baumeister, Philipp
name: Rauer, Heike
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Demixing properties of planetary major constituents influence the interior structure and evolution of planets. Comparing experimental and computational data on the miscibility of hydrogen and water to adiabatic profiles suggests phase separation between these components occurs in the ice giants Uranus and Neptune. We aim to predict the atmospheric water abundance and transition pressure between the water-poor outer envelope and the water-rich deep interior in Uranus and Neptune. We construct seven H2-H2O phase diagrams from the available experimental and computational data. We compute interior adiabatic structure models and compare these to the phase diagrams to infer whether demixing is occurring. We obtain a strong water depletion in the top layer due to rain-out of water and find upper limits on the atmospheric water mass fraction Z_atm of 0.21 for Uranus and 0.16 for Neptune. The transition from the water-poor to the water-rich layer is sharp and occurs at pressures P_Z between 4 and 11 GPa. Using these constraints on Z_atm and P_Z, we find that the observed gravitational harmonics J2 and J4 can be reproduced if P_Z > 10 GPa in Uranus and > 5 GPa in Neptune, and if the deep interior has a high primordial water mass fraction of 0.8, unless rocks are also present. The agreement with J4 is improved if rocks are confined deeper than P_Z, for instance below a rock cloud level at 2000 K (20-30 GPa). These findings confirm classical few-layer models and suggest that a layered structure may result from a combination of primordial mass accretion and subsequent phase separation. Reduced observational uncertainty in J4 and its dynamic contribution, atmospheric water abundance measurements from an Orbiter with a Probe mission to Uranus (UOP) or Neptune, and better understanding of the mixing behaviour of constituents are needed to constrain the interiors of ice giants.
description: Accepted for publication in Astronomy and Astrophysics