cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Integrated photometry of multiple stellar populations in Globular Clusters
Creators: name: Jang, S.
name: Milone, A. P.
name: Lagioia, E. P.
name: Tailo, M.
name: Carlos, M.
name: Dondoglio, E.
name: Martorano, M.
name: Mohandasan, A.
name: Marino, A. F.
name: Cordoni, G.
name: Lee, Y. -W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Evidence that the multiple populations (MPs) are common properties of globular clusters (GCs) is accumulated over the past decades from clusters in the Milky Way and in its satellites. This finding has revived GC research, and suggested that their formation at high redshift must have been a much-more complex phenomenon than imagined before. However, most information on MPs is limited to nearby GCs. The main limitation is that most studies on MPs rely on resolved stars, facing a major challenge to investigate the MP phenomenon in distant galaxies. Here we search for integrated colors of old GCs that are sensitive to the multiple-population phenomenon. To do this, we exploit integrated magnitudes of simulated GCs with MPs, and multi-band Hubble Space Telescope photometry of 56 Galactic GCs, where MPs are widely studied, and characterized as part of the UV Legacy Survey of Galactic GCs. We find that both integrated $C_{\rm F275W,F336W,F438W}$ and $m_{\rm F275W}-m_{\rm F814W}$ colors strongly correlate with the iron abundance of the host GC. In second order, the pseudo two-color diagram built with these integrated colors is sensitive to the MP phenomenon. In particular, once removed the dependence from cluster metallicity, the color residuals depend on the maximum internal helium variation within GCs and on the fraction of second-generation stars. This diagram, which we define here for Galactic GCs, has the potential of detecting and characterizing MPs from integrated photometry of old GCs, thus providing the possibility to extend their investigation outside the Local Group.
description: 17 pages, 10 figures, 2 tables
The Hottest Horizontal-Branch Stars in omega Centauri - Late Hot Flasher vs. Helium Enrichment
Creators: name: Moehler, S.
name: Dreizler, S.
name: Lanz, T.
name: Bono, G.
name: Sweigart, A. V.
name: Calamida, A.
name: Monelli, M.
name: Nonino, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: UV observations of some massive globular clusters uncovered a significant population of very hot stars below the hot end of the horizontal branch (HB), the so-called blue hook stars. This feature might be explained either as results of the late hot flasher scenario where stars experience the helium flash while on the white dwarf cooling curve or by the progeny of the helium-enriched sub-population recently postulated to exist in some clusters. Moderately high resolution spectra of stars at the hot end of the blue HB in omega Cen were analysed for atmospheric parameters and abundances using LTE and Non-LTE model atmospheres. In the temperature range 30,000K to 50,000K we find that 35% of our stars are helium-poor (log(n_He/n_H) < -2), 51% have solar helium abundance within a factor of 3 (-1.5 <= log(n_He/n_H) <= -0.5) and 14% are helium-rich (log(n_He/n_H)> -0.4). We also find carbon enrichment in step with helium enrichment, with a maximum carbon enrichment of 3% by mass. At least 14% of the hottest HB stars in omega Cen show helium abundances well above the highest predictions from the helium enrichment scenario (Y = 0.42 corresponding to log(n_He/n_H) ~ -0.74). In addition, the most helium-rich stars show strong carbon enrichment as predicted by the late hot flasher scenario. We conclude that the helium-rich HB stars in omega Cen cannot be explained solely by the helium-enrichment scenario invoked to explain the blue main sequence. (Abridged)
description: 4 pages, 3 figures, uses aa.cls (enclosed), accepted as A&A Letter
Photoproduction in Ultra-Peripheral Heavy Ion Collisions at STAR
Creators: name: Grube, Boris
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present recent STAR results on photoproduction in ultra-peripheral relativistic heavy ion collisions. In these collisions the impact parameter of the beam particles is larger than the sum of their nuclear radii, so that they interact via their long-range Coulomb fields. STAR has measured the production of $ρ^0(770)$ mesons in exclusive reactions as well as in processes with mutual nuclear excitation of the beam particles. We present results for the $ρ^0$ production cross section in Au-Au collisions at $\sqrt{s_{NN}}=200$ GeV for coherent as well as incoherent coupling. The dependence of the cross section on the $ρ^0$ rapidity is compared to theoretical models. We also studied the ratio of coherent $ρ^0$ to direct $π^+π^-$ production as well as the $ρ^0$ helicity matrix elements and we observe interference effects in the $ρ^0$ production. In addition STAR has measured the production of $ρ^0$ mesons in d-Au collisions at $\sqrt{s_{NN}}=200$ GeV and that of $e^+e^-$-pairs in Au-Au at $\sqrt{s_{NN}}=200$ GeV. We also see an enhancement around 1510 MeV/c in $π^+π^-π^+π^-$ final states in Au-Au collisions at $\sqrt{s_{NN}}=200$ GeV.
description: 8 pages, 9 figures, Proceedings of Workshop on "High energy photon collisions at the LHC", Geneva, Switzerland, Apr. 22-25, 2008
Third turn repair
Creators: name: Pfeiffer, Martin
name: Mostovaia, Irina
Publisher: name: OSF
Year: 2022
Subjects: Conversation Analysis
Encyclopedia
Ethnomethodology
Interactional Linguistics

description: A third turn repair is a self-initiated self-repair that sequentially occurs neither within the same turn-constructional unit (TCU) as the trouble source nor in the transition-relevance place (TRP) after the trouble-source TCU but after the “intervening talk” (Schegloff 1997: 36) by the recipient of the trouble source (cf. Schegloff 1992, 1997; see also Liddicoat 2007: 203-206).
Maranta friedrichsthaliana Kornicke 1862
Creators: name: Fraga, Fernanda Ribeiro De Mello
name: Braga, João Marcelo Alvarenga
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Zingiberales
Marantaceae
Maranta
Maranta friedrichsthaliana

description: Maranta friedrichsthaliana Körnicke (1862: 42)
Type (lectotype, designated here):— COSTA RICA. Monte Aguacate, November 1845 -1848, Ørsted s.n. (C10014454; isolectotypes: C10014452, C10014453, W [†]). (Fig. 12)
Remaining syntype:— COSTA RICA. no date, Friedrichsthal 1269 (W [†]).
Protologue citation:—“ Guatemala in monte Aquacate leg. Friedrichsthal n. l269 (Herb. Vindob.), et Oersted (Herb. Oersted).”
Notes:— Körnicke (1862) cited the gatherings Friedrichsthal 1269 (W) and Ørsted (C). The Friedrichsthal 1269 (W) specimen was destroyed, and no duplicates were found by us. The Ørsted s.n. gathering is represented by three specimens at C herbarium, as well as a photograph of Macbride’s Collection (Photo Negative no. F 22238). The specimen C 10014454 (Ørsted s.n.) is designated here as the lectotype since it has a stamp which says “Specimen originale”, probably made by the author.
description: Published as part of Fraga, Fernanda Ribeiro De Mello & Braga, João Marcelo Alvarenga, 2020, Nomenclatural notes and typification of names in Maranta (Marantaceae), pp. 133-163 in Phytotaxa 435 (2) on pages 142-148, DOI: 10.11646/phytotaxa.435.2.3, http://zenodo.org/record/13875628
Maximally Mutable Laurent Polynomials
Creators: name: Coates, Tom
name: Kasprzyk, Alexander M.
name: Pitton, Giuseppe
name: Tveiten, Ketil
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J33, 52B20 (Primary), 14J45, 14N35, 13F60, 32G20 (Secondary)

description: We introduce a class of Laurent polynomials, called maximally mutable Laurent polynomials (MMLPs), that we believe correspond under mirror symmetry to Fano varieties. A subclass of these, called rigid, are expected to correspond to Fano varieties with terminal locally toric singularities. We prove that there are exactly 10 mutation classes of rigid MMLPs in two variables; under mirror symmetry these correspond one-to-one with the 10 deformation classes of smooth del~Pezzo surfaces. Furthermore we give a computer-assisted classification of rigid MMLPs in three variables with reflexive Newton polytope; under mirror symmetry these correspond one-to-one with the 98 deformation classes of three-dimensional Fano manifolds with very ample anticanonical bundle. We compare our proposal to previous approaches to constructing mirrors to Fano varieties, and explain why mirror symmetry in higher dimensions necessarily involves varieties with terminal singularities. Every known mirror to a Fano manifold, of any dimension, is a rigid MMLP.
description: 21 pages, plus a 321 page appendix; 7 figures; 100 tables
Photometric Survey for Stellar Clusters in the Outer Part of M33
Creators: name: Zloczewski, K.
name: Kaluzny, J.
name: Hartman, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a catalog of 4780 extended sources from the outer field of M33. The catalog includes 73 previously identified clusters or planetary nebulae, 1153 likely background galaxies, and 3554 new candidate stellar clusters. The survey is based on deep ground-based images obtained with the MegaCam instrument on the CFHT telescope. We provide g'r'i' photometry for detected objects as well as estimates of the FWHM and ellipticity of their profiles. The sample includes 122 new, relatively bright, likely globular clusters. Follow-up observations of fainter candidates from our list may extend the faint-end of the observed luminosity function of globular clusters in M33 by up to 3 magnitudes. The catalog includes several cluster candidates located in the outskirts of the galaxy. These objects are promising targets for deep photometry with the HST. We present a color-magnitude diagram for one detected object, showing that it is an extended and low-surface-brightness old cluster located at an angular distance of 27' from the center of M33.
description: 19 pages, 9 figures, for an on-line catalog of cluster canidates, please see: http://www.camk.edu.pl/case/results/M33/index.html
Contemporary criticism and ’Le cas Satie’
Creators: name: Sandberg-Brennan, Karin
Publisher: name: University of British Columbia
Year: 2010

description: While scholars recognize Satie's important influence on the music of our century, the extent and specific nature of his influence has yet to be defined. Focusing on analyses of his personality and his music, modern literature continually neglects to study Satie's historical importance. It is his so-called bizarre and eccentric personality and the pretended simplicity of his musical style that have, in general, attracted modern authors' attention. Consequently, a controversy known as "Le Cas Satie" has developed: How could an eccentric composer whose music is frequently considered inconsequential, have truly exerted the great influence attributed to him in modern literature? If Satie's historical position is to be understood, modern literature's portrayal of the composer must be examined for accuracy, and the extent of his impact must be clarified. This study makes a contribution in this direction by examining criticism (in music reviews, art and theatrical journals and in daily newspapers) published in Paris from 1892 to 1930. Our thesis first surveys this criticism, familiarizing the reader with it and revealing how widely Satie was known through the press. An analysis of the criticism then demonstrates how Satie was generally regarded by his contemporaries. Three facets of the composer are discussed: his personality, his humor, and his music. We learn that the contemporary view of Satie was that of a respected composer, unlike the typical modern depiction of him as an eccentric. Furthermore, an examination of contemporary comments about Satie's significance provides insights into his historical position, for they reveal that it was not his music, but rather the influence of his musical compositions and his aesthetics that were considered his most important contributions. By defining those areas in which Satie was believed to be most significant, we begin to understand the extent and specific nature of his influence.
Radiation hydrodynamics simulations of line-driven AGN disc winds: metallicity dependence and black hole growth
Creators: name: Nomura, Mariko
name: Omukai, Kazuyuki
name: Ohsuga, Ken
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Growth of the black holes (BHs) from the seeds to supermassive BHs (SMBHs, $\sim\!10^9\,M_\odot$) is not understood, but the mass accretion must have played an important role. We performed two-dimensional radiation hydrodynamics simulations of line-driven disc winds considering the metallicity dependence in a wide range of the BH mass, and investigated the reduction of the mass accretion rate due to the wind mass loss. Our results show that denser and faster disc winds appear at higher metallicities and larger BH masses. The accretion rate is suppressed to $\sim\! 0.4$--$0.6$ times the mass supply rate to the disc for the BH mass of $M_{\rm BH}\gtrsim 10^5\,M_{\odot}$ in high-metallicity environments of $Z\gtrsim Z_\odot$, while the wind mass loss is negligible when the metallicity is sub-solar ($\sim 0.1Z_\odot$). By developing a semi-analytical model, we found that the metallicity dependence of the line force and the BH mass dependence of the surface area of the wind launch region are the cause of the metallicity dependence ($\propto\! Z^{2/3}$) and BH mass dependencies ($\propto\! M_{\rm BH}^{4/3}$ for $M_{\rm BH}\leq 10^6\,M_\odot$ and $\propto\! M_{\rm BH}$ for $M_{\rm BH}\geq 10^6\,M_\odot$) of the mass-loss rate. Our model suggests that the growth of BHs by the gas accretion effectively slows down in the regime $\gtrsim 10^{5}M_\odot$ in metal-enriched environments $\gtrsim Z_\odot$. This means that the line-driven disc winds may have an impact on late evolution of SMBHs.
description: 11 pages, 7 figures, accepted for publication in MNRAS
Semileptonic bc to cc Baryon Decay and Heavy Quark Spin Symmetry
Creators: name: Flynn, Jonathan M.
name: Nieves, Juan
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the semileptonic decays of the lowest-lying bc baryons to the lowest-lying cc baryons (Xi_{bc}^{(\prime*)}--> Xi_{cc}^{(*)} and Omega_{bc}^{(\prime*)}--> Omega_{cc}^{(*)}), in the limit m_b, m_c >> Lambda_{QCD} and close to the zero recoil point. The separate heavy quark spin symmetries make it possible to describe all these decays using a single form factor. We recover results derived previously by White and Savage in a manner which we think is more straightforward and parallels the method applied later to study Bc semileptonic decays. We further discuss the resemblance between the bc baryon decays and those of Bc mesons to eta_c and J/ψmesons and comment on the relation between the slopes of the single functions describing each set of decays. Our results can straightforwardly be applied to the decays of bb baryons to bc baryons.
description: 4 pages,1 figure. Version accepted for publication
Suppression of Supergravity Anomalies in Conformal Sequestering
Creators: name: Endo, Motoi
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that the anomaly-mediated supersymmetry breaking via the Kahler and sigma-model anomalies is suppressed by conformal dynamics in the supersymmetry breaking sector.
description: 8 pages
Entropy points and applications for free semigroup actions
Creators: name: Rodrigues, Fagner B.
name: Jacobus, Thomas
name: Silva, Marcus V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37A35 37A50 37B55 37B05

description: The aim of this manuscript is to study some local properties of the topological entropy of a free semigroup action. In order to do that we focus on the set of entropy points of a free semigroup action, show that this set carries the full entropy of the system (which, with respect to the chaocity of the system, gives a fundamental relevance to such set) and obtain many interesting properties of such set. Our results are inspired by the ones presented in \cite{YZ}.
Maranta protracta Miquel 1844
Creators: name: Fraga, Fernanda Ribeiro De Mello
name: Braga, João Marcelo Alvarenga
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Zingiberales
Marantaceae
Maranta
Maranta protracta

description: Maranta protracta Miquel (1844: 71)
Type (lectotype, designated here):— SURINAME. “La Rencontre”, April 1843, Focke 793 (U 0003919, isolectotypes HAL 0110074, L 0041054). (Fig. 22)
Protologue citation:—“Crescit Surinami ad plant. La Rencontre, m. Aprilis florens. [H. C.Focke]”
Notes:— Maranta protacta was based only on Focke 793. Three duplicates were found in HAL, L and U herbarium, and we herein designated the specimen U 0003919 as the lectotype.
description: Published as part of Fraga, Fernanda Ribeiro De Mello & Braga, João Marcelo Alvarenga, 2020, Nomenclatural notes and typification of names in Maranta (Marantaceae), pp. 133-163 in Phytotaxa 435 (2) on page 158, DOI: 10.11646/phytotaxa.435.2.3, http://zenodo.org/record/13875628
A geometric distance to the supermassive black Hole of NGC 3783
Creators: name: GRAVITY Collaboration
name: Amorim, A.
name: Bauböck, M.
name: Bentz, M. C.
name: Brandner, W.
name: Bolzer, M.
name: Clénet, Y.
name: Davies, R.
name: de Zeeuw, P. T.
name: Dexter, J.
name: Drescher, A.
name: Eckart, A.
name: Eisenhauer, F.
name: Schreiber, N. M. Förster
name: Garcia, P. J. V.
name: Genzel, R.
name: Gillessen, S.
name: Gratadour, D.
name: Hönig, S.
name: Kaltenbrunner, D.
name: Kishimoto, M.
name: Lacour, S.
name: Lutz, D.
name: Millour, F.
name: Netzer, H.
name: Onken, C. A.
name: Ott, T.
name: Paumard, T.
name: Perraut, K.
name: Perrin, G.
name: Petrucci, P. O.
name: Pfuhl, O.
name: Prieto, M. A.
name: Rouan, D.
name: Shangguan, J.
name: Shimizu, T.
name: Stadler, J.
name: Sternberg, A.
name: Straub, O.
name: Straubmeier, C.
name: Street, R.
name: Sturm, E.
name: Tacconi, L. J.
name: Tristram, K. R. W.
name: Vermot, P.
name: von Fellenberg, S.
name: Widmann, F.
name: Woillez, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The angular size of the broad line region (BLR) of the nearby active galactic nucleus (AGN) NGC 3783 has been spatially resolved by recent observations with VLTI/GRAVITY. A reverberation mapping (RM) campaign has also recently obtained high quality light curves and measured the linear size of the BLR in a way that is complementary to the GRAVITY measurement. The size and kinematics of the BLR can be better constrained by a joint analysis that combines both GRAVITY and RM data. This, in turn, allows us to obtain the mass of the supermassive black hole in NGC3783 with an accuracy that is about a factor of two better than that inferred from GRAVITY data alone. We derive $M_\mathrm{BH}=2.54_{-0.72}^{+0.90}\times 10^7\,M_\odot$. Finally, and perhaps most notably, we are able to measure a geometric distance to NGC 3783 of $39.9^{+14.5}_{-11.9}$ Mpc. We are able to test the robustness of the BLR-based geometric distance with measurements based on the Tully-Fisher relation and other indirect methods. We find the geometric distance is consistent with other methods within their scatter. We explore the potential of BLR-based geometric distances to directly constrain the Hubble constant, $H_0$, and identify differential phase uncertainties as the current dominant limitation to the $H_0$ measurement precision for individual sources.
description: 9 pages and 5 figures in main text, Accepted for publication in A&A
Maranta ruiziana Kornicke 1862
Creators: name: Fraga, Fernanda Ribeiro De Mello
name: Braga, João Marcelo Alvarenga
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Zingiberales
Marantaceae
Maranta
Maranta ruiziana

description: Maranta ruiziana Körnicke (1862: 45)
Type (lectotype, designated here):— PERU. “Peruvia subandin”, January 1829 -1830, Poeppig 1682 (G00302578; isolectotypes: LE00001344, LE00001345, B [†], W [†]). (Fig. 23). Remaining syntype:— PERU. “Ad Chicoplaya”, 1798, Pavón 26 (s.n. on protologue) (G00168735, MA810689, B [†]).
Protologue citation:—Peruvia: Ad Chicoplaya anno 1798 leg. Pavon (Herb. Berolin.). In Peruvia subandina Versurae leg. Poeppig n. 1682 (Herb. Berolin., Vindob., Hort. et Acad. Petrop. Turczaninow).
Notes: — Körnicke (1862) cited the gatherings Pavón (B) and Poeppig 1682 (B, KW, W). Three sheets were assigned as Poeppig 1682, and some were identified as “ Maranta dichotoma Poepp. ” This name appeared only in the herbarium, but it was listed in the protologue of M. ruiziana (see “ Maranta dichotoma Poeppig in mss. Herb nec A. Dietr”). Two specimens and a negative of Macbride’s Collection (Photo Negative no. F 9846) were identified as Pavón. We herein designate specimen G 00302578 (Poeppig 1682) as lectotype, because it has more abundant flowers.
description: Published as part of Fraga, Fernanda Ribeiro De Mello & Braga, João Marcelo Alvarenga, 2020, Nomenclatural notes and typification of names in Maranta (Marantaceae), pp. 133-163 in Phytotaxa 435 (2) on pages 158-162, DOI: 10.11646/phytotaxa.435.2.3, http://zenodo.org/record/13875628
Modeling Stellar Atmospheres with a Spherically Symmetric Version of the Atlas Code: Testing the Code by Comparisons to Interferometric Observations and PHOENIX Models
Creators: name: Neilson, Hilding R.
name: Lester, John B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: One of the current opportunities for stellar atmospheric modeling is the interpretation of optical interferometric data of stars. Starting from the robust, open source ATLAS atmospheric code (Kurucz, 1979), we have developed a spherically symmetric code, SATLAS, as a new option for modeling stellar atmospheres of low gravity stars. The SATLAS code is tested against both interferometric observations of M giants by Wittkowski and collaborators, and spherically symmetric M giant NextGen models from the PHOENIX code. The SATLAS models predict interferometric visibilities that agree with the observed visibilities and with predicted visibilities, and the SATLAS atmospheric structures also agree with those from spherical PHOENIX models, with just small differences in temperature and pressure at large depths in the atmospheres.
description: 4 pages, 4 figures, 1 table. To appear in the proceedings of Cool Stars, Stellar Systems and the Sun, 15th Cambridge Workshop, St. Andrews, UK, AIP Conference Series, fixed typos
CORBEL Report on integrated biomedical data and project proposals for biomarker validation in clinical trial monitoring
Creators: name: van Ommen, Gertjan
Publisher: name: Zenodo
Year: 2019
Subjects: biobanks
preclinical biomarkers
pancreatic cancer

description: The work package aimed to integrate the resources in four (later five) different biobanks in four countries to find early (preclinical) biomarkers for pancreatic cancer, a currently rapidly lethal cancer for which no treatment is available, most likely due largely to the late and advanced stage in which it is diagnosed. First this was attempted with metabolomics, through which two biomarkers of potential interest were found, glutamine and histidine, these were of too low impact to have clinical utility, despite findings of biological interest. Then the attention was turned to proteomics and here 6 proteins of oncological relevance were found as potential biomarkers: GZMH, VEGFR2, FGFBP1, GPNMB, CRTAC1 and ITGAV. As the next step, their clinical interest is being independently validated followed by integrated multi-omics analysis.
Constraints on the electromagnetic counterpart of the Neutron Star Black Hole merger GW200115
Creators: name: Dichiara, S.
name: Becerra, R. L.
name: Chase, E. A.
name: Troja, E.
name: Lee, W. H.
name: Watson, A. M.
name: Butler, N. R.
name: O'Connor, B.
name: Pereyra, M.
name: López, K. O. C.
name: Lien, A. Y.
name: Gottlieb, A.
name: Kutyrev, A. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the results of our follow-up campaign for the neutron star - black hole (NSBH) merger GW200115 detected during the O3 run of the Advanced LIGO and Advanced Virgo detectors. We obtained wide-field observations with the Deca-Degree Optical Transient Imager (DDOTI) covering ~20% of the total probability area down to a limiting magnitude of $w$=20.5 AB at ~23 h after the merger. Our search for counterparts returns a single candidate (AT2020aeo), likely not associate to the merger. In total, only 25 sources of interest were identified by the community and later discarded as unrelated to the GW event. We compare our upper limits with the emission predicted by state-of-the-art kilonova simulations and disfavor high mass ejecta (>0.1$M_{\odot}$), indicating that the spin of the system is not particularly high. By combining our optical limits with gamma-ray constraints from $Swift$ and $Fermi$, we disfavor the presence of a standard short duration burst for viewing angles $\lesssim$15 deg from the jet axis. Our conclusions are however limited by the large localization region of this GW event, and accurate prompt positions remain crucial to improving the efficiency of follow-up efforts.
description: 6 pages, 4 figures, accepted for publication ApJ
Capillary filling in patterned channels
Creators: name: Kusumaatmaja, H.
name: Pooley, C. M.
name: Girardo, S.
name: Pisignano, D.
name: Yeomans, J. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We show how the capillary filling of microchannels is affected by posts or ridges on the sides of the channels. Ridges perpendicular to the flow direction introduce contact line pinning which slows, or sometimes prevents, filling; whereas ridges parallel to the flow provide extra surface which may enhances filling. Patterning the microchannel surface with square posts has little effect on the ability of a channel to fill for equilibrium contact angle $θ_e \lesssim 30^{\mathrm{o}}$. For $θ_e \gtrsim 60^{\mathrm{o}}$, however, even a small number of posts can pin the advancing liquid front.
description: 4 pages, 4 figures
On the constant in the Mertens product for arithmetic progressions. I. Identities
Creators: name: Languasco, Alessandro
name: Zaccagnini, Alessandro
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11N13

description: The aim of the paper is the proof of new identities for the constant in the Mertens product for arithmetic progressions. We deal with the problem of the numerical computation of these constants in another paper.
description: References added, misprints corrected. 9 pages
On the Stability of Electrostatic Orbits
Creators: name: Banerjee, Shubho
name: Taylor, Bradford
name: Banerjee, Anand
Publisher: name: arXiv
Year: 2008
Subjects: subject: Classical Physics (physics.class-ph)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: We analyze the stability of two charged conducting spheres orbiting each other. Due to charge polarization, the electrostatic force between the two spheres deviates significantly from $1/r^2$ as they come close to each other. As a consequence, there exists a critical angular momentum, $L_c$, with a corresponding critical radius $r_c$. For $L > L_c$ two circular orbits are possible: one at $r > r_c$ that is stable and the other at $r < r_c$ that is unstable. This critical behavior is analyzed as a function of the charge and the size ratios of the two spheres.
description: Added references, corrected typos, clarified language
Quantum oscillations in 2D insulators induced by graphite gates
Creators: name: Zhu, Jiacheng
name: Li, Tingxin
name: Young, Andrea F.
name: Shan, Jie
name: Mak, Kin Fai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We demonstrate a mechanism for magnetoresistance oscillations in insulating states of two-dimensional (2D) materials arising from the interaction of the 2D layer and proximal graphite gates. We study a series of devices based on different two-dimensional systems, including mono- and bilayer Td-WTe2, angle-aligned MoTe2/WSe2 heterobilayers and Bernal-stacked bilayer graphene, which all share a similar graphite-gated geometry. We find that the resistivity of the 2D system generically shows quantum oscillations as a function of magnetic field corresponding to a high-density Fermi surface when they are tuned near an insulating state, in contravention of naïve band theory. Simultaneous measurement of the resistivity of the graphite gates show that these oscillations are precisely correlated with quantum oscillations in the resistivity of the graphite gates themselves. Further supporting this connection, the oscillations are quenched when the graphite gate is replaced by TaSe2, a high-density metal that does not show quantum oscillations. The observed phenomenon arises from the oscillatory behavior of graphite density of states, which modulates the device capacitance and, as a consequence, the carrier density in the sample layer even when a constant electrochemical potential is maintained between the sample and the gate electrode. Oscillations are most pronounced near insulating states where the resistivity is strongly density dependent. Our study suggests a unified mechanism for quantum oscillations in graphite-gated 2D insulators based on sample-gate coupling.
Trapping and cooling of rf-dressed atoms in a quadrupole magnetic field
Creators: name: Morizot, Olivier
name: Alzar, Carlos L. Garrido
name: Pottie, Paul-Eric
name: Lorent, Vincent
name: Perrin, Hélène
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We observe the spontaneous evaporation of atoms confined in a bubble-like rf-dressed trap (Zobay and Garraway, 2001). The atoms are confined in a quadrupole magnetic trap and are dressed by a linearly polarized rf field. The evaporation is related to the presence of holes in the trap, at the positions where the rf coupling vanishes, due to its vectorial character. The final temperature results from a competition between residual heating and evaporation efficiency, which is controlled via the height of the holes with respect to the bottom of the trap. The experimental data are modeled by a Monte-Carlo simulation predicting a small increase in phase space density limited by the heating rate. This increase was within the phase space density determination uncertainty of the experiment.
description: 6 pages, 6 figures; to appear in J. Phys. B
Trapping Horizons as inner boundary conditions for black hole spacetimes
Creators: name: Jaramillo, J. L.
name: Gourgoulhon, E.
name: Cordero-Carrion, I.
name: Ibanez, J. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a set of inner boundary conditions for the numerical construction of dynamical black hole space-times, when employing a 3+1 constrained evolution scheme and an excision technique. These inner boundary conditions are heuristically motivated by the dynamical trapping horizon framework and are enforced in an elliptic subsystem of the full Einstein equation. In the stationary limit they reduce to existing isolated horizon boundary conditions. A characteristic analysis completes the discussion of inner boundary conditions for the radiative modes.
description: 4 pages, no figures, RevTeX4
Changes in Dark Matter Properties After Freeze-Out
Creators: name: Cohen, Timothy
name: Morrissey, David E.
name: Pierce, Aaron
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The properties of the dark matter that determine its thermal relic abundance can be very different from the dark matter properties today. We investigate this possibility by coupling a dark matter sector to a scalar that undergoes a phase transition after the dark matter freezes out. If the value of Omega_DM h^2 calculated from parameters measured at colliders and by direct and indirect detection experiments does not match the astrophysically observed value, a novel cosmology of this type could provide the explanation. This mechanism also has the potential to account for the "boost factor" required to explain the PAMELA data.
description: 5 pages; v2: Fixed minor typo, added short discussion of application to PAMELA and appropriate references, results unchanged
The effects of repeated aerobic and non-aerobic exercise on cigarette smoking
Creators: name: Reesor, Kenneth Alan
Publisher: name: University of British Columbia
Year: 2010

description: While there is strong evidence of an inverse relationship between levels of physical activity and cigarette consumption, there are few experimental investigations of the effect of exercise on cigarette smoking. Moreover, the available research is limited by research design flaws such as non-random assignment, lack of appropriate controls, inadequate specification of exercise, and reliance on self-report measures. In this investigation, twenty-four female and twelve male cigarette smokers, who were not attempting to quit, were randomly assigned to one of three groups: 1) an aerobic exercise condition consisting of continuous, high-intensity cycling on stationary bikes; 2) a non-aerobic exercise condition consisting of discontinuous, minimal-intensity muscle stretching and tensing exercises; or 3) a no-exercise control condition. Subjects monitored the time and rated their 'enjoyment' of each cigarette smoked on weekdays during 4 consecutive weeks and participated in eight standardized exercise or control sessions scheduled during the second and third weeks. Pre- and post-session measures of state anxiety and blood pressure were taken at the first and last exercise or corresponding control session. Surreptitious observations of smoking topography were taken immediately afterward. Contrary to predictions, only the non-aerobic exercise produced a significant reduction in both the rate and number of puffs taken and a significant increase in the latency to smoke for the first two cigarettes following exercise. No effect was found on cigarette consumption during the observation period or on self-reported daily cigarette consumption. Also contrary to" expectations, self-reported anxiety prior to exercise increased over repeated sessions in the aerobic exercise condition, but decreased over sessions in the non-aerobic condition. At the end of the study, subjects in the aerobic condition rated themselves as significantly more likely to quit smoking than subjects in either of the other conditions. There were, however, no significant differences in cigarette consumption or intention to quit at a 4-month follow-up. These results do not support the hypothesis that increasing aerobic exercise reduces cigarette smoking. They do indicate, however, that minimal-intensity exercise can modify smoking topography in a manner previously shown to reduce health risk. The results also suggest that previous demonstrations of anxiolytic effects of aerobic exercise may have been confounded by increased anxiety occurring in anticipation of aerobic exercise.
Ultracool Dwarfs Observed with the Spitzer Infrared Spectrograph. I. An Accurate Look at the L-to-T Transition at $\sim$300 Myr from Optical through Mid-infrared Spectrophotometry
Creators: name: Suárez, Genaro
name: Metchev, Stanimir
name: Leggett, Sandy K.
name: Saumon, Didier
name: Marley, Mark S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present $Spitzer$ IRS 5--14 $μ$m spectra and 16 $μ$m and 22 $μ$m photometry of the T2.5 companion to the $\sim$300 Myr-old G0V star HN Peg. We incorporate previous 0.8--5 $μ$m observations to obtain the most comprehensive spectral energy distribution of an intermediate-gravity L/T-transition dwarf which, together with an accurate Gaia EDR3 parallax of the primary, enable us to derive precise fundamental parameters. We find that young ($\approx$0.1--0.3 Gyr) early-T dwarfs on average have $\approx$140 K lower effective temperatures, $\approx$20% larger radii, and similar bolometric luminosities compared to $\gtrsim$1 Gyr-old field dwarfs with similar spectral types. Our accurate infrared spectrophotometry offers new detail at wavelengths where the dominant carbon-bearing molecules have their strongest transitions: at 3.4 $μ$m for methane and at 4.6 $μ$m for carbon monoxide. We assess the performance of various widely available photospheric models and find that models with condensates and/or clouds better reproduce the full SED of this moderately young early-T dwarf. However, cloud-free models incorporating a more general convective instability treatment reproduce at least the low-resolution near-IR spectrum similarly well. Our analysis of $R\approx2300$ $J$-band spectra shows that the near-infrared potassium absorption lines in HN Peg B have similar strengths to those seen in both younger and older T2-T3 dwarfs. We conclude that while alkali lines are well-established as surface gravity indicators for L-type or warmer stars, they are insensitive to surface gravity in early-T dwarfs
description: Accepted for publication in ApJ
title: International Corporate Governance
Creators: name: Larcker, David F.
name: Tayan, Brian
Publisher: name: Corporate Governance Research Initiative
Year: 2020

description: The governance system that a company adopts is not independent of its environment. Instead, it is shaped by a variety of factors inherent to the business setting. This Quick Guide explains the factors that shape governance systems around the world. It also provides an overview of governance systems in selected countries. It answers the questions: Why do governance systems vary? How important are capital markets? What is the impact of legal tradition? Why do accounting standards matter? How do societal values shape governance?
On the Outage Capacity of a Practical Decoder Using Channel Estimation Accuracy
Creators: name: Piantanida, Pablo
name: Sadough, Sajad
name: Duhamel, Pierre
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The optimal decoder achieving the outage capacity under imperfect channel estimation is investigated. First, by searching into the family of nearest neighbor decoders, which can be easily implemented on most practical coded modulation systems, we derive a decoding metric that minimizes the average of the transmission error probability over all channel estimation errors. This metric, for arbitrary memoryless channels, achieves the capacity of a composite (more noisy) channel. Next, according to the notion of estimation-induced outage capacity (EIO capacity) introduced in our previous work, we characterize maximal achievable information rates associated to the proposed decoder. The performance of the proposed decoding metric over uncorrelated Rayleigh fading MIMO channels is compared to both the classical mismatched maximum-likelihood (ML) decoder and the theoretical limits given by the EIO capacity (i.e. the best decoder in presence of channel estimation errors). Numerical results show that the derived metric provides significant gains, in terms of achievable information rates and bit error rate (BER), in a bit interleaved coded modulation (BICM) framework, without introducing any additional decoding complexity.
Transport and spectral properties of the XX$+$XXZ diode and stability to dephasing
Creators: name: Lee, Kang Hao
name: Balachandran, Vinitha
name: Guo, Chu
name: Poletti, Dario
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the transport and spectral property of a segmented diode formed by an XX $+$ XXZ spin chain. This system has been shown to become an ideal rectifier for spin current for large enough anisotropy. Here we show numerical evidence that the system in reverse bias has three different transport regimes depending on the value of the anisotropy: ballistic, diffusive and insulating. In forward bias we encounter two regimes, ballistic and diffusive. The system in forward and reverse bias shows significantly different spectral properties, with distribution of rapidities converging towards different functions. In the presence of dephasing the system becomes diffusive, rectification is significantly reduced, the relaxation gap increases and the spectral properties in forward and reverse bias tend to converge. For large dephasing the relaxation gap decreases again as a result of Quantum Zeno physics.
(Multi)Matrix Models and Interacting Clones of Liouville Gravity
Creators: name: Kiritsis, Elias
name: Niarchos, Vasilis
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Large-N matrix models coupled via multitrace operators are used to define, via appropriate double-scaling limits, solvable models of interacting multi-string theories. It is shown that although such theories are non-local at the world-sheet level they have a simple description of the spacetime physics. Such theories share the main characteristics of similarly coupled higher-dimensional CFTs. An interpretation has been given in the past of similar continuum limits in terms of Liouville interactions that violate the Seiberg bound. We provide a novel interpretation of this relation which agrees with the current understanding of Liouville theory and analogous observations in the AdS/CFT correspondence.
description: 45 pages, 4 figures; v2 references added, version to appear in JHEP
Liparis mai X. D. Tu, M. Z. Huang & M. H. Li FJFC 2020, sp. nov.
Creators: name: Tu, Xiong-De
name: Huang, Ming-Zhong
name: Liu, Ding-Kun
name: Ma, Liang
name: Li, Ming-He
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Liparis
Liparis mai

description: Liparis mai X.D.Tu, M.Z.Huang & M.H.Li, sp. nov. (Μ氏¥Ąŵ; Figs. 2, 3)
Type:— CHINA. Guangxi (广ƃ): Jingxi (fflƃ), terrestrial in evergreen broad-leaved forests, 1300 m, May 2018, FJFC 0676 (holotype FJFC!; isotype FJFC!).
This new species is similar to L. nervosa, from which it differs by the older pseudobulb often bearing bulbil; leaves 4–7, leaf blade elliptic-lanceolate to ovate-elliptic, 11.0–17.0 × 4.5–7.5 cm; lateral sepal revolute, narrowly ovateoblong; lip obovate-elliptic and base with a two-lobed callus.
Plants terrestrial, Herbs, 22.0–33.0 cm. Pseudobulb cylindric, tapering, surrounded by 3–4 basal leaf sheaths; old leafless pseudobulbs covering several membranous sheaths at internodes and usually bearing bulbils; bulbils subspherical to ellipsoid, black, surrounded by white sheaths. Leaves 4–7, base, clasping, leaf blade elliptic-lanceolate to ovate-elliptic, wrinkled, membranous or grassy, base slightly sloping and contracting to petiole, margin undulate, 11.0–17.0 × 4.5–7.5 cm; petiole sheathing, 3.0–5.0 cm long. Inflorescences terminal, racemose, 14.0–17.0 cm long; peduncle ridged, bracteate; rachis 9.0–12.0 cm with 5–8 flowered. Floral bracts ovate-triangular, carinate on the abaxial, purple, 2.0– 2.5 mm long. Column 5.0–6.0 mm, with narrow wings on both sides. Dorsal sepal oblong-lanceolate, 10.5–11.0 mm long, 1.0– 1.3 mm wide, obtuse at apex, usually curved or reflexed, margin revolute; Lateral sepals revolute, narrowly ovate oblong, 8.0– 8.5 mm long, 3.5–4.5 mm wide, obtuse at apex. Petals linear, more or less sickleshaped, 10.0–11.0 mm long, 0.7–0.9 mm wide, margin revolved; lip curved, obovate-elliptic, slightly fleshy and thick, 7.0–8.0 mm long, 6.5–7.5 mm wide, base narrowed and with 2 caniniform callus. Column elongated, slightly curved at apex, 5.0– 5.5 mm long, column wings conspicuous. Stigma transverse, concave, subquadrate. Anther terminal, 2- celled, persistent, oblong ovoid, ca. 1.0 mm long. Pollen obovoid, flat, hard, waxy, yellow.
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Phenology: —Flowering May.
Distribution and habitat: —Grows in evergreen, broad-leaved forest at 1300 m of Jingxi County, Guangxi Zhuang Autonomous Region, China.
Etymology: —Species epithet refers name of its discoverer, Kuan Ma.
description: Published as part of Tu, Xiong-De, Huang, Ming-Zhong, Liu, Ding-Kun, Ma, Liang & Li, Ming-He, 2020, Liparis mai (Orchidaceae; Malaxideae), a new species from China: evidence from morphological and molecular analyses, pp. 235-242 in Phytotaxa 435 (3) on pages 236-239, DOI: 10.11646/phytotaxa.435.3.3, http://zenodo.org/record/13875702