Results 21 to 30 of about 4,822,469 (343)

New insight into the magnetism of degenerate stars from the analysis of a volume-limited sample of white dwarfs [PDF]

Monthly notices of the Royal Astronomical Society, 2021
Many stars evolve into magnetic white dwarfs (MWDs), and observations may help to understand when the magnetic field appears at the stellar surface, if and how it evolves during the cooling phase, and, above all, what are the mechanisms that generate ...
S. Bagnulo, J. Landstreet
semanticscholar   +1 more source

AdS graviton stars and differential configurational entropy [PDF]

Physics Letters B, 2021
AdS graviton stars are studied in the differential configurational entropy setup, as solutions of the effective Einstein field equations that backreact to compactification.
R. da Rocha
semanticscholar   +1 more source

Constraints on the phase transition and nuclear symmetry parameters from PSR J0740+6620 and multimessenger data of other neutron stars [PDF]

Physical Review D, 2021
Shao-Peng Tang, 2 Jin-Liang Jiang, 2 Ming-Zhe Han, 2 Yi-Zhong Fan, 2, ∗ and Da-Ming Wei 2 Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210033, People’s Republic of China School of ...
Shao-Peng Tang, Jin-Liang Jiang, Ming-Zhe Han, Yizhong Fan, D. Wei   +4 more
semanticscholar   +1 more source

Origin of the DA and non-DA white dwarf stars [PDF]

International Astronomical Union Colloquium, 1989
Understanding the origin of DA and non-DA stars — the bifurcation of the white dwarf cooling sequence — is one of oldest and perniciously difficult problems in the white dwarf research field. Processes which could play a role have been discussed for years. For example, the idea of diffusive element separation was suggested by Schatzman (1958).
openaire   +1 more source

Magnetic activity and hot Jupiters of young Suns : the weak-line T Tauri stars V819 Tau and V830 Tau [PDF]

, 2015
SGG acknowledges support from the Science & Technology Facilities Council (STFC) via an Ernest Rutherford Fellowship [ST/J003255/1]. SHPA acknowledges financial support from CNPq, CAPES and Fapemig.
Delfosse, X., Hébrard, E., Gregory, S. G.; id_orcid, Ménard, F., Gregory, S. G., Alencar, S. H. P., Donati, J. -F., Takami, M., Vidotto, A. A., Petit, P., MaTYSSE Collaboration, Grankin, K., Donati, J.F., Figueira, P., Donati, J. F., Menard, Francois, Morin, J., Gregory, Scott, Herczeg, G., Bouvier, J., Jardine, Moira Mary, Fares, R., Hussain, G. A. J., Jardine, M. M., Boisse, I., Moutou, C., Donati, J.-F., Hussain, Gaitee Ara Jaffer, Fares, Rim, Collaboration, Matysse, Doyon, R., Vidotto, Aline, Malo, L.   +32 more
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The GALAH survey: Accreted stars also inhabit the Spite plateau [PDF]

, 2021
The European Space Agency (ESA) Gaia mission has enabled the remarkable discovery that a large fraction of the stars near the solar neighbourhood are debris from a single in-falling system, the so-called Gaia-Sausage-Enceladus (GSE).
Buder, Sven, Bland-Hawthorn, Joss, Wyse, Rosemary F.G., D'ORAZI, VALENTINA, Sharma, Sanjib, Simpson, Jeffrey D., Tepper-García, Thor, Nordlander, Thomas, Zucker, Daniel B., Čotar, Klemen, Stello, Dennis, Casey, Andrew R., De Silva, Gayandhi M., Lind, Karin,, Freeman, Ken C., Lind, Karin, Ting, Yuan Sen, Kos, Janez, Zwitter, Tomaž, Ting, Yuan-Sen, Martell, Sarah L., Hayden, Michael, Schlesinger, Katharine J., Asplund, Martin, Da Costa, Gary, Wyse, Rosemary F. G., Lewis, Geraint F., Horner, Jonathan   +27 more
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Discovery of 74 new bright ZZ Ceti stars in the first three years of TESS [PDF]

, 2022
We report the discovery of 74 new pulsating DA white dwarf stars, or ZZ Cetis, from the data obtained by the Transiting Exoplanet Survey Satellite (TESS) mission, from Sectors 1 to 39, corresponding to the first 3 cycles.
A. Romero, S. O. Kepler, J. Hermes, L. A. Amaral, M. Uzundag, Zs'ofia Bogn'ar, K. Bell, Madison VanWyngarden, A. Baran, I. Pelisoli, Gabriela Bonifácio da Costa Oliveira, D. Koester, T. Klippel, L. Fraga, P. Bradley, M. Vučković, T. Heintz, J. S. Reding, B. Kaiser, S. Charpinet   +19 more
semanticscholar   +1 more source

Hot DAVs: a probable new class of pulsating white dwarf stars [PDF]

, 2013
We have discovered a pulsating DA white dwarf at the lower end of the temperature range 45 000–30 000 K where a few helium atmosphere white dwarfs are known. There are now three such pulsators known, suggesting that a new class of theoretically predicted
Gansicke, B. T., Marsh, Tom, Kurtz, D.W., Copperwheat, Chris M., Kurtz, Donald Wayne, Copperwheat, C.M., Copperwheat, C. M., Gaensicke, B. T., Littlefair, Stuart P., Dhillon, V. S., Littlefair, S.P., Parsons, Steven G., Parsons, S. G., Kurtz, D. W., Gänsicke, B.T., Parsons, S.G., Marsh, T.R., Dhillon, Vik S., Dhillon, V.S., Littlefair, S. P., Shibahashi, H., Marsh, T. R.   +21 more
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On the Spectral Evolution of Hot White Dwarf Stars. IV. The Diffusion and Mixing of Residual Hydrogen in Helium-rich White Dwarfs

The Astrophysical Journal, 2023
In the framework of our extensive modeling study of the spectral evolution of white dwarfs, we present here a new set of detailed calculations of the transport of residual hydrogen in helium-rich white dwarfs. First, we investigate the so-called float-up
A. Bédard, P. Bergeron, P. Brassard
doaj   +1 more source

Can fermion-boson stars reconcile multimessenger observations of compact stars? [PDF]

Physical Review D, 2021
Fabrizio Di Giovanni, Nicolas Sanchis-Gual, Pablo Cerdá-Durán, and José A. Font 3 Departamento de Astronomı́a y Astrof́ısica, Universitat de València, Dr. Moliner 50, 46100, Burjassot (València), Spain Departamento de Matemática da Universidade de Aveiro
F. Di Giovanni, N. Sanchis-Gual, P. Cerdá-Durán, J. Font   +3 more
semanticscholar   +1 more source