bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Spectroscopic Classification Survey to Search for New ρ Puppis Stars
Authors: McGahee Courtney , Gray Richard O. , Griffin R. E. M. , Birchard Mariah , Day Jared 
Published: July 2020

Abstract
The ρ Puppis stars are mid-F-type stars that show peculiar chemical-abundance patterns similar to those of the Am stars. Typically they exhibit overabundances of iron-peak elements such as Fe and Ni and s- and r-process elements such as Sr and Eu, and underabundances of certain other elements including He, Ca, and Sc. It has been proposed that these stars are evolving Am stars passing through the short-lived phase that occurs between the re-establishment of convection and the consequent erasure of their chemical peculiarities. In this paper we suggest a second hypothesis: these stars may have acquired their peculiar abundance patterns in a fashion similar to the Barium stars, i.e., they may have gained the s-process element enhancements via mass transfer from a once asymptotic giant-branch companion star, now turned white dwarf. This study will detail our efforts to investigate the ρ Puppis stars with regard to these two hypotheses, with a view to understanding these stars and their significance in terms of stellar evolution. We have performed a spectral classification survey, and a detailed chemical-abundance analysis of selected ρ Puppis stars. This paper gives an overview of the ρ Puppis stars and describes the spectral classification survey which has increased the number of ρ Puppis stars currently known from 6 to 49. A future paper will describe the chemical-abundance analysis which should provide insight into the nature of these stars.
Two Intermediate-mass Transiting Brown Dwarfs from the TESS Mission
Authors: Carmichael Theron W. , Quinn Samuel N. , Mustill Alexander J. , Huang Chelsea , Zhou George , Persson Carina M. , Nielsen Louise D. , Collins Karen A. , Ziegler Carl , Collins Kevin I. , Rodriguez Joseph E. , Shporer Avi , Brahm Rafael , Mann Andrew W. , Bouchy Francois , Fridlund Malcolm , Stassun Keivan G. , Hellier Coel , Seidel Julia V. , Stalport Manu , Udry Stephane , Pepe Francesco , Ireland Michael , Žerjal Maruša , Briceño César , Law Nicholas , Jordán Andrés , Espinoza Néstor , Henning Thomas , Sarkis Paula , Latham David W. 
Published: July 2020

Abstract
We report the discovery of two intermediate-mass transiting brown dwarfs (BDs), TOI-569b and TOI-1406b, from NASA’s Transiting Exoplanet Survey Satellite mission. TOI-569b has an orbital period of P = 6.55604 ± 0.00016 days, a mass of M

b
= 64.1 ± 1.9

, and a radius of R

b
= 0.75 ± 0.02

. Its host star, TOI-569, has a mass of M
⋆ = 1.21 ± 0.05

, a radius of R
⋆ = 1.47 ± 0.03

,

dex, and an effective temperature of T
eff = 5768 ± 110 K. TOI-1406b has an orbital period of P = 10.57415 ± 0.00063 days, a mass of M

b
= 46.0 ± 2.7

, and a radius of R

b
= 0.86 ± 0.03

. The host star for this BD has a mass of M
⋆ = 1.18 ± 0.09

, a radius of R
⋆ = 1.35 ± 0.03

,

dex, and an effective temperature of T
eff = 6290 ± 100 K. Both BDs are in circular orbits around their host stars and are older than 3 Gyr based on stellar isochrone models of the stars. TOI-569 is one of two slightly evolved stars known to host a transiting BD (the other being KOI-415). TOI-1406b is one of three known transiting BDs to occupy the mass range of 40–50

and one of two to have a circular orbit at a period near 10 days (with the first being KOI-205b). Both BDs have reliable ages from stellar isochrones, in addition to their well-constrained masses and radii, making them particularly valuable as tests for substellar isochrones in the BD mass–radius diagram.
Feasibility of Observing Gamma-Ray Polarization from Cygnus X-1 Using a CubeSat
Authors: Yang Chien-Ying , Chang Yi-Chi , Liang Hung-Hsiang , Chu Che-Yen , Hsiang Jr-Yue , Chiu Jeng-Lun , Lin Chih-Hsun , Laurent Philippe , Rodriguez Jerome , Chang Hsiang-Kuang 
Published: July 2020

Abstract
Instruments flown on CubeSats are small. Meaningful applications of CubeSats in astronomical observations rely on the choice of a particular subject that is feasible for CubeSats. Here we report the result of a feasibility study for observing gamma-ray polarization from Cygnus X-1 using a small Compton polarimeter on board a 3U CubeSat. Silicon detectors and cerium bromide scintillators were employed in the instrument models that we discuss in this study. Through Monte Carlo simulations with a Geant4-based MEGAlib package, we found that, with a 10 Ms on-axis, zenith-direction observation in a low-inclination, low-altitude, Earth-orbit radiation background environment, the minimum detectable polarization degree can be down to about 10% in 160–250 keV, 20% in 250–400 keV, and 65% in 400–2000 keV. A 3U CubeSat dedicated to observing Cygnus X-1 can therefore yield useful information on the polarization state of gamma-ray emissions from the brightest persistent X-ray black hole binary in the sky.
Planes of Satellites around Simulated Disk Galaxies. I. Finding High-quality Planar Configurations from Positional Information and Their Comparison to MW/M31 Data
Authors: Santos-Santos Isabel , Domínguez-Tenreiro Rosa , Artal Héctor , Pedrosa Susana E. , Bignone Lucas , Martínez-Serrano Francisco , Gómez-Flechoso M. Ángeles , Tissera Patricia B. , Serna Arturo 
Published: July 2020

Abstract
We address the “plane of satellites problem” by studying planar configurations around two disk galaxies with no late major mergers, formed in zoom-in hydro-simulations. Due to the current lack of good-quality kinematic data for M31 satellites, we use only positional information. So far, positional analyses of simulations are unable to find planes as thin and populated as the observed ones. We follow a novel systematic and detailed plane searching technique to study the properties and quality of planes of satellites, in both simulations or real data. In particular, (i) we extend the four-galaxy-normal density plot method (Pawlowski et al. 2013) in a way designed to efficiently identify high-quality planes (i.e., thin and populated) without imposing extra constraints on their properties, and (ii), we apply it for the first time to simulations. Using zoom-in simulations allows us to mimic Milky Way/M31-like systems regarding the number of satellites involved as well as galactic disk effects. In both simulations, we find satellite planar configurations that are compatible, along given time intervals, with all of the spatial characteristics of observed planes identified using the same methodology. During most of these periods, planes are approximately perpendicular to the galactic disk. However, the fraction of co-orbiting satellites within them is, in general, low, suggesting time-varying satellite membership. We conclude that high-quality positional planes of satellites could be not infrequent in ΛCDM-formed disk galaxies with a quiet assembly history. Detecting kinematically coherent, time-persistent planes demands considering the full six-dimensional phase-space information of satellites.
The Spin-period History of Intermediate Polars
Authors: Patterson Joseph , de Miguel Enrique , Kemp Jonathan , Dvorak Shawn , Monard Berto , Hambsch Franz-Josef , Vanmunster Tonny , Skillman David R. , Cejudo David , Campbell Tut , Roberts George , Jones Jim , Cook Lewis M. , Bolt Greg , Rea Robert , Ulowetz Joseph , Krajci Thomas , Menzies Kenneth , Lowther Simon , Goff William , Stein William , Wood Matt A. , Myers Gordon , Stone Geoffrey , Uthas Helena , Karamehmetoglu Emir , Seargeant Jim , McCormick Jennie 
Published: July 2020

Abstract
We report the detailed history of spin-period changes in five intermediate polars (DQ Herculis, AO Piscium, FO Aquarii, V1223 Sagittarii, and BG Canis Minoris) during the 30–60 yr since their original discovery. Most are slowly spinning up, although there are sometimes years-long episodes of spin-down. This is supportive of the idea that the underlying magnetic white dwarfs are near spin equilibrium. In addition to the ∼40 stars sharing many properties and defined by their strong, pulsed X-ray emission, there are a few rotating much faster (P < 80 s), whose membership in the class is still in doubt—and who are overdue for closer study.
Coherent Stellar Motion in Galactic Spiral Arms by Swing Amplification
Authors: Michikoshi Shugo , Kokubo Eiichiro 
Published: July 2020

Abstract
We perform local N-body simulations of disk galaxies and investigate the evolution of spiral arms. We calculate the time autocorrelation of the surface density of spiral arms and find that the typical evolution timescale is described by the epicycle period. We investigate the distribution of the orbital elements of stars and find that in spiral arms the epicycle motions of stars are in phase while the spatial distribution of the guiding center is nearly uniform. These facts clearly show that the phase synchronization of the epicycle motion takes place, which is theoretically predicted by the swing amplification.
Implications of Inhomogeneous Metal Mixing for Stellar Archaeology
Authors: Tarumi Yuta , Hartwig Tilman , Magg Mattis 
Published: July 2020

Abstract
The first supernovae enrich the previously pristine gas with metals, out of which the next generation of stars form. Based on hydrodynamical simulations, we develop a new stochastic model to predict the metallicity of star-forming gas in the first galaxies. On average, in internally enriched galaxies, the metals are well mixed with the pristine gas. However, in externally enriched galaxies, the metals cannot easily penetrate into the dense gas, which yields a significant metallicity difference between the star-forming and average gas inside a halo. To study the consequences of this effect, we apply a semianalytical model to Milky Way–like dark matter merger trees and follow stellar fossils from high redshift until the present day with a novel realistic metal mixing recipe. We calibrate the model to reproduce the metallicity distribution function (MDF) at low metallicities and find that a primordial initial mass function (IMF) with a slope of

from 2 to

best reproduces the MDF. Our improved model for inhomogeneous mixing can have a large impact for individual minihalos but does not significantly influence the modeled MDF at [Fe/H] ≳ −4 or the best-fitting Population III IMF.
Thermally Unstable Cooling Stimulated by Uplift: The Spoiler Clusters
Authors: Martz C. G. , McNamara B. R. , Nulsen P. E. J. , Vantyghem A. N. , Gingras M-J. , Babyk Iu. V. , Russell H. R. , Edge A. C. , McDonald M. , Tamhane P. D. , Fabian A. C. , Hogan M. T. 
Published: July 2020

Abstract
Chandra X-ray observations are analyzed for five galaxy clusters whose atmospheric cooling times, entropy parameters, and ratios of cooling time to freefall time within the central galaxies lie below 1 Gyr, below 30 keV cm2, and between 20 ≲ min(t
cool/t
ff) ≲ 50, respectively. These thermodynamic properties are commonly associated with molecular clouds, bright Hα emission, and star formation in central galaxies. However, all have Hα luminosities below 1040 erg s−1 in the ACCEPT database. Star formation and molecular gas are absent at the levels seen in other central galaxies with similar atmospheric properties. Only RBS 0533 may host a radio/X-ray bubble, which are commonly observed in cooling atmospheres. Signatures of uplifted, high-metallicity atmospheric gas are absent. Their atmospheres are apparently thermodynamically stable despite the absence of strong nuclear feedback. We suggest that extended filaments of nebular emission and associate molecular clouds are absent at appreciable levels because their central radio sources have failed to lift low-entropy atmospheric gas to an altitude where the ratio of the cooling time to the freefall time falls below unity and the gas becomes thermally unstable.
Du paradoxe du dire à sa forclusion
Authors: Toboul Bernard 
Published: July 2020

L’exil est une réalité historique. Or, c’est aussi le propre du sujet de l’inconscient que Lacan définit comme exilé du rapport sexuel. Le réel du non rapport sexuel se constitue-t-il comme impossible par forclusion d’un dire ? Telle est la question qui sous-tend l’affirmation de Lacan : « il n’est forclusion que du dire ». Elle répercute ses effets dans les tentatives de la civilisation de produire des dires forclos.
Sur la « forclusion du dire »
Authors: Pellion Frédéric 
Published: July 2020

On tente ici de mettre en forme la perplexité suscitée par un point du texte de Bernard Toboul, « Exilés du rapport sexuel ». Pour ce faire, il semble falloir repasser par une rapide archéologie de la Verwerfung freudienne, puis suivre son devenir jusqu’à la « forclusion de fait » de Lacan.
Trois petits mots, un univers
Authors: Vellut Natacha 
Published: July 2020

Parler d’amour et haine c’est articuler ce qui paraît inarticulable : le symbolique des signifiants et le réel ineffable de ce qui s’éprouve. La nuit du chasseur , film qu’aima Marguerite Duras, et le mot d’esprit, qui enchanta Sigmund Freud, nous éclairent.
Quand Géry Legrand amusait les Lillois avec Les Chansons de Desrousseaux (29 décembre 1871)
Authors: Marchand Philippe 
Published: July 2020

Si Géry Legrand est resté dans l’histoire pour sa carrière politique, on ignore tout de l’homme de lettres, auteur d’une œuvre considérable et reconnue de son temps, mais ignorée de nos jours. Pour évoquer cet aspect de sa personnalité, nous retenons ici une de ses œuvres, Les Chansons de Desrousseaux. Tableau populaire , représentée à Lille le 29 décembre 1871. Après avoir évoqué la carrière littéraire de Géry Legrand, nous présenterons le synopsis et les personnages des Chansons de Desrousseaux . On s’interrogera ensuite sur les raisons qui ont pu inciter Géry Legrand à écrire cette pièce qui peut surprendre quand on connaît ses autres productions littéraires. Enfin, on abordera la question de sa réception et de son destin.
De l’impôt du sang au devoir du citoyen (1789-1872). L’engagement de la France septentrionale dans la défense de la Nation
Authors: Crépin Annie 
Published: July 2020

La Révolution française invente la participation du citoyen – même celui qui ne fait pas métier des armes – à la défense nationale. Ce devoir finit par être considéré comme la liberté suprême du citoyen, voire comme l’incarnation de la citoyenneté. Elle est institutionnalisée par la création de la conscription que chacun des régimes qui se succèdent au xix e siècle remodèle à sa façon mais garde, tant elle est pour l’État-nation centralisateur un outil d’achèvement de l’unité nationale. Pour autant, les Français n’y adhèrent pas unanimement ni immédiatement. Il s’en faut de quatre-vingt ans. Le processus d’enracinement de l’institution varie selon les époques, selon les couches sociales et selon les régions. Il emprunte des chemins particuliers à chaque région. En France septentrionale, par exemple, l’engagement des citoyens connaît trois phases. Au commencement des guerres de la Révolution, une acceptation initiale qui n’est pas durable. Puis, à partir de 1793, un basculement place la France septentrionale dans le « camp du refus » jusqu’à la fin de la conscription napoléonienne. L’engagement prend la forme d’une résistance à la conscription. Après la chute du premier Empire, s’ouvre une troisième phase. La France septentrionale rejoint le camp des bons départements conscriptionnels. Il est vrai que la conscription n’est pas encore le service militaire obligatoire et ne requiert pas non plus alors l’engagement personnel de chaque citoyen. La population la perçoit comme l’impôt du sang même si elle ne conteste plus la nécessité pour la collectivité de s’en acquitter.
Sites of Lomelosia graminifolia (Scabiosa graminifolia) on the northeasternmost known locality in the Alps / Rastišča vrste Lomelosia graminifolia (Scabiosa graminifolia) na najbolj severovzhodnem znanem nahajališču v Alpah
Authors: Dakskobler Igor , Trnkoczy Amadej 
Published: July 2020

We studied the sites of Lomelosia graminifolia on its newly discovered, northeasternmost locality in the Alps, at the Sravnik ravine in the Trenta Valley. Individual specimens or smaller groups grow in the ravine itself or on the sunny slopes nearby at 520 to 810 m a.s.l. on gravelly and rocky sites with shallow initial soils. The communities in which it occurs can be classified into two associations. The stands on scree slopes were classified into the association Stipetum calamagrostis. The stands on gravelly grasslands were compared with similar, previously described communities in the Southern and Southeastern Alps. In view of obvious floristic and ecological differences between them we described a new association – Aquilegio einseleanae-Caricetum mucronatae.
Key words: phytosociology, synsystematics, Lomelosia graminifolia, Stipetum calamagrostis, Julian Alps, Triglav National Park, Slovenia

Izvleček
Preučili smo rastišča vrste Lomelosia graminifolia na njenem novo odkritem najbolj severovzhodnem nahajališču v Alpah, v grapi Sravnik v dolini Trente. Tam posamezni primerki ali manjše skupine rastejo v sami grapi ali na prisojnih pobočjih ob njej na nadmorski višini od 520 m do 810 m na gruščnatih in skalnatih rastiščih s plitvimi inicialnimi tlemi. Združbe, v katerih uspeva, lahko uvrstimo v dve asociaciji. Sestoje na meliščih smo uvrstili v asociacijo Stipetum calamagrostis. Sestoje na gruščnatih traviščih smo primerjali s podobnimi že opisanimi združbami v Južnih in Jugovzhodnih Alpah in na podlagi očitnih florističnih in ekoloških razlik med njimi opisali novo asociacijo Aquilegio einseleanae-Caricetum mucronatae.
Ključne besede: fitocenologija, sinsistematika, Lomelosia graminifolia, Stipetum calamagrostis, Julijske Alpe, Triglavski narodni park, Slovenija
Phytosociological analysis of Castanea sativa woods in Slovenian Istria / Fitocenološka analiza gozdnih sestojev evropskega pravega kostanja (Castanea sativa) v Slovenski Istri
Authors: Dakskobler Igor , Sadar Zvone 
Published: July 2020

In Slovenian Istria we conducted a phytosociological analysis of forest stands with dominating Castanea sativa in the tree layer. These forest stands are situated in the vicinity of the village of Puče (between Šmarje and Koštabona) in the Drnica river basin, in the catchment area of the creek Malinska (between Gradin and Abitanti, near the village of Stara Mandrija) and in the catchment area of the creek Pregon (south of Pregara at the villages of Reparec and Tuniši). Based on the comparison with similar sweet chestnut woods in Croatia and Bosnia they were classified into the association Helleboro istriaci-Castaneetum sativae Medak 2009 and two new subassociations: -ornithogaletosum pyrenaici and -ruscetosum aculeati. According to our findings, the studied stands are secondary, pioneer or degradation stages, probably on former beech or oak sites from associations Ornithogalo pyrenaici-Fagetum, Seslerio autumnalis-Fagetum and Seslerio autumnalis-Quercetum petraeae. However, because Castanea sativa regenerates in these stands and persists there for generations, these stands could also be treated as a special habitat and/or forest site type, but this is an assessment best left to the competent experts.
Key words: phytosociology, synsystematics, Helleboro istriaci-Castaneetum sativae, Carpinion orientalis, Istria, Slovenia

Izvleček
Fitocenološko smo analizirali gozdne sestoje v Slovenski Istri, v katerih v drevesni plasti prevladuje pravi kostanj (Castanea sativa). Našli smo jih v okolici vasi Puče (med Šmarjami in Koštabono) v porečju Drnice, v povodjih potoka Malinska (med Gradinom in Abitanti, blizu vasi Stara Mandrija) in v povodju potoka Pregon (južno od Pregare pri vaseh Reparec in Tuniši). Na podlagi primerjave s podobnimi kostanjevimi gozdovi na Hrvaškem in v Bosni smo jih uvrstili v asociacijo Helleboro istriaci-Castaneetum sativae Medak 2009 in v dve novi subasociaciji: -ornithogaletosum pyrenaici in -ruscetosum aculeati. Po naših spoznanjih so preučeni sestoji drugotni, pionirski ali degradacijski stadiji na nekoč najbrž bukovih ali hrastovih rastiščih iz asociacij Ornithogalo pyrenaici-Fagetum, Seslerio autumnalis-Fagetum in Seslerio autumnalis-Quercetum petraeae. Ker pa se pravi kostanj v njih pomlajuje in ohranja več generacij, jih je mogoče vrednotiti tudi kot poseben habitatni in/ali gozdni rastiščni tip, a presojo o tem prepuščamo pristojnim strokovnjakom.
Ključne besede: fitocenologija, sinsistematika, Helleboro istriaci-Castaneetum sativae, Carpinion orientalis, Istra, Slovenija
Le Paysage de la vallée de l’Ondaine. Complexité et paradoxe de la transformation et de la narration d’un territoire post minier
Authors: Laffont Georges-Henry , Rojas Luc 
Published: July 2020

Haut lieu de l’activité industrielle durant plusieurs siècles, la vallée de l’Ondaine est aujourd’hui encore marquée par les traces de l’industrialisation. Au sein de celle-ci, l’héritage minier est une trace prégnante au regard de l’importance de l’extraction houillère dans l’histoire de ce territoire. Malgré une phase de deuil débutant à la fin des années 1970, les acteurs locaux ont encore des difficultés à prendre en compte les artefacts miniers dans leurs politiques territoriales. La vallée de l’Ondaine, majoritairement composée de trois petites villes dont les populations oscillent entre 8 000 et 16 000 habitants, nous donne à voir un territoire sur lequel s’expriment trois « projets » différents en matière de gestion de l’héritage minier. Le paysage est ainsi l’expression de ces « projets » considérant l’héritage minier comme un élément qui participe à la construction d’un imaginaire, qui constitue également une ressource à exploiter et parfois une histoire à oublier au profit d’un autre récit du territoire.