Evolutionary and pulsational properties of white dwarf stars
Leandro Gabriel Althaus,Leandro Gabriel Althaus,Alejandro H. Córsico,Alejandro H. Córsico,Jordi Isern,Enrique García-Berro +5 more
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TLDR
A detailed review of the physics of white dwarfs can be found in this paper, with a focus on the physical processes that lead to the formation of the stars and the different energy sources responsible for chemical abundance changes that occur along their evolution.Abstract:
White dwarf stars are the final evolutionary stage of the vast majority of stars, including our Sun. Since the coolest white dwarfs are very old objects, the present population of white dwarfs contains a wealth of information on the evolution of stars from birth to death, and on the star formation rate throughout the history of our Galaxy. Thus, the study of white dwarfs has potential applications in different fields of astrophysics. In particular, white dwarfs can be used as independent reliable cosmic clocks, and can also provide valuable information about the fundamental parameters of a wide variety of stellar populations, such as our Galaxy and open and globular clusters. In addition, the high densities and temperatures characterizing white dwarfs allow these stars to be used as cosmic laboratories for studying physical processes under extreme conditions that cannot be achieved in terrestrial laboratories. Last but not least, since many white dwarf stars undergo pulsational instabilities, the study of their properties constitutes a powerful tool for applications beyond stellar astrophysics. In particular, white dwarfs can be used to constrain fundamental properties of elementary particles such as axions and neutrinos and to study problems related to the variation of fundamental constants. These potential applications of white dwarfs have led to renewed interest in the calculation of very detailed evolutionary and pulsational models for these stars. In this work, we review the essentials of the physics of white dwarf stars. We enumerate the reasons that make these stars excellent chronometers, and we describe why white dwarfs provide tools for a wide variety of applications. Special emphasis is placed on the physical processes that lead to the formation of white dwarfs as well as on the different energy sources and processes responsible for chemical abundance changes that occur along their evolution. Moreover, in the course of their lives, white dwarfs cross different pulsational instability strips. The existence of these instability strips provides astronomers with a unique opportunity to peer into their internal structure that would otherwise remain hidden from observers. We will show that this allows one to measure stellar masses with unprecedented precision and to infer their envelope thicknesses, to probe the core chemical stratification, and to detect rotation rates and magnetic fields. Consequently, in this work, we also review the pulsational properties of white dwarfs and the most recent applications of white dwarf asteroseismology.read more
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Journal ArticleDOI
The Dark Energy Survey: more than dark energy - an overview
T. M. C. Abbott,F. B. Abdalla,Jelena Aleksić,S. Allam,Adam Amara,David Bacon,Eduardo Balbinot,Manda Banerji,Keith Bechtol,A. Benoit-Lévy,A. Benoit-Lévy,Gary Bernstein,E. Bertin,Jonathan Blazek,C. Bonnett,Sarah Bridle,David Brooks,Robert J. Brunner,Robert J. Brunner,E. Buckley-Geer,D. L. Burke,D. L. Burke,G. B. Caminha,Diego Capozzi,J. Carlsen,A. Carnero-Rosell,Marcella Carollo,M. Carrasco-Kind,M. Carrasco-Kind,J. Carretero,J. Carretero,Francisco J. Castander,L. Clerkin,Thomas E. Collett,Christopher J. Conselice,Martin Crocce,Carlos E. Cunha,C. B. D'Andrea,L. N. da Costa,Tamara M. Davis,Shantanu Desai,H. T. Diehl,J. P. Dietrich,Scott Dodelson,Scott Dodelson,Peter Doel,Alex Drlica-Wagner,Juan Estrada,J. Etherington,August E. Evrard,J. Fabbri,D. A. Finley,B. Flaugher,Ryan J. Foley,Pablo Fosalba,Joshua A. Frieman,Joshua A. Frieman,Juan Garcia-Bellido,Enrique Gaztanaga,D. W. Gerdes,Tommaso Giannantonio,Daniel A. Goldstein,Daniel A. Goldstein,Daniel Gruen,Daniel Gruen,Robert A. Gruendl,Robert A. Gruendl,P. Guarnieri,G. Gutierrez,William G. Hartley,K. Honscheid,Bhuvnesh Jain,David J. James,Tesla E. Jeltema,Stephanie Jouvel,Richard Kessler,A. L. King,Donnacha Kirk,Richard G. Kron,Kyler Kuehn,Nikolay Kuropatkin,Ofer Lahav,Tianjun Li,Marcos Lima,Huan Lin,Marcio A. G. Maia,Martin Makler,Marc Manera,Claudia Maraston,Jennifer L. Marshall,Paul Martini,Richard G. McMahon,Peter Melchior,Alex Merson,Christopher J. Miller,Ramon Miquel,Ramon Miquel,Joseph J. Mohr,Xan Morice-Atkinson,Krishna Naidoo,Eric H. Neilsen,Robert C. Nichol,Brian Nord,Ricardo L. C. Ogando,F. Ostrovski,Antonella Palmese,A. Papadopoulos,A. Papadopoulos,Hiranya V. Peiris,John Peoples,Will J. Percival,A. A. Plazas,S. L. Reed,Alexandre Refregier,A. K. Romer,A. Roodman,A. Roodman,Ashley J. Ross,Eduardo Rozo,Eli S. Rykoff,Eli S. Rykoff,I. Sadeh,M. Sako,C. Sánchez,E. J. Sanchez,Basilio X. Santiago,V. Scarpine,Michael Schubnell,I. Sevilla-Noarbe,Erin Sheldon,Mathew Smith,Robert Connon Smith,Marcelle Soares-Santos,Flavia Sobreira,Maayane T. Soumagnac,E. Suchyta,Mark Sullivan,M. E. C. Swanson,G. Tarle,Jon J Thaler,Daniel Thomas,Daniel Thomas,R. C. Thomas,Douglas L. Tucker,Joaquin Vieira,Joaquin Vieira,Vinu Vikram,Alistair R. Walker,Risa H. Wechsler,Risa H. Wechsler,Jochen Weller,W. C. Wester,L. Whiteway,H. Wilcox,Brian Yanny,Yanming Zhang,Joe Zuntz +156 more
TL;DR: In this paper, the authors presented the results of the Dark Energy Survey (DES) 2013, 2014, 2015, 2016, 2017, 2018, 2019 and 2019 at the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign.
Journal ArticleDOI
A Gaia Data Release 2 catalogue of white dwarfs and a comparison with SDSS
Nicola Pietro Gentile Fusillo,Pier-Emmanuel Tremblay,Boris T. Gänsicke,Christopher J. Manser,Tim Cunningham,Elena Cukanovaite,Mark Hollands,Tom Marsh,Roberto Raddi,Stefan Jordan,Silvia Toonen,Stephan Geier,Martin A. Barstow,Jeffrey D. Cummings +13 more
TL;DR: In this paper, a catalogue of white dwarf candidates selected from the second data release of Gaia (DR2) is presented, consisting of 486641 stars with calculated probability of being a white dwarf (PWD) for all Gaia sources that passed the initial selection.
Journal ArticleDOI
Mixed modes in red-giant stars observed with CoRoT
Benoit Mosser,C. Barban,Josefina Montalbán,Paul G. Beck,Andrea Miglio,Andrea Miglio,K. Belkacem,K. Belkacem,M. J. Goupil,Saskia Hekker,Saskia Hekker,J. De Ridder,Marc-Antoine Dupret,Y. P. Elsworth,Alfred F. Noels,Frédéric Baudin,Eric Michel,Reza Samadi,Michel Auvergne,Annie Baglin,Claude Catala +20 more
TL;DR: In this paper, a method based on the envelope autocorrelation function is proposed to identify the mixed-mode signature separation thanks to their pattern that is compatible with the asymptotic law of gravity modes.
Journal ArticleDOI
New evolutionary sequences for extremely low-mass white dwarfs - Homogeneous mass and age determinations and asteroseismic prospects
TL;DR: In this paper, a fine and homogeneous grid of evolutionary sequences for helium (He) core white dwarfs for the whole range of their expected masses (0.15 − 0.45 ) is provided.
Journal ArticleDOI
Post-main-sequence planetary system evolution
TL;DR: In this article, the authors review the diverse dynamical processes which affect planets, asteroids, comets and pebbles as their parent stars evolve into giant branch, white dwarf and neutron stars.
References
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TL;DR: The Sloan Digital Sky Survey (SDSS) as discussed by the authors provides the data to support detailed investigations of the distribution of luminous and non-luminous matter in the universe: a photometrically and astrometrically calibrated digital imaging survey of π sr above about Galactic latitude 30° in five broad optical bands to a depth of g' ~ 23 mag.
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TL;DR: In this paper, the theory of the internal structure of stars and their evolution in time is introduced and the basic physics of stellar interiors, methods for solving the underlying equations, and the most important results necessary for understanding the wide variety of stellar types and phenomena.