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An overview of white dwarf stars [PDF]
EPJ Web of Conferences, 2013 We present a brief summary of what is currently known about white dwarf stars, with an emphasis on their evolutionary and internal properties. As is well known, white dwarfs represent the end products of stellar evolution for the vast majority of stars ...
Charpinet S. +4 more
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Cooling Process of White Dwarf Stars in Palatini f(R) Gravity [PDF]
Universe, 2022 A simple cooling model of white dwarf stars is re-analyzed in Palatini f(R) gravity. Modified gravity affects the white dwarf structures and consequently their ages.
Surajit Kalita +2 more
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International Journal of Modern Physics: Conference Series, 2017 White dwarf stars are the final stage of most stars, born single or in multiple systems. We discuss the identification, magnetic fields, and mass distribution for white dwarfs detected from spectra obtained by the Sloan Digital Sky Survey up to Data ...
Souza Oliveira Kepler +3 more
semanticscholar +4 more sources
Asteroseismology of white dwarf stars [PDF]
Symposium - International Astronomical Union, 1997 The theoretical potential of white dwarf asteroseismology is summarized. It is shown how one can derive fundamental parameters on the internal structure and evolution of these stars. The analysis of the non-radial g-modes permits in principle to determine the total mass, the rotation rate, the magnetic field strength. The mass of the outer layers, left
G. Vauclair
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Asteroseismology of DAV white dwarf stars [PDF]
Open Astronomy, 1998 Following the recent mode identification by Clemens suggesting the hydrogen layer mass of the DAV (ZZ Ceti) stars is nearly the same, I make the extreme assumption that models with a single composition profile with a hydrogen layer mass of 1.5 × 10−4M* may be able to fit the observed pulsation periods.
Bradley P. A.
doaj +4 more sources
A Jovian analogue orbiting a white dwarf star [PDF]
Nature, 2021 Studies1,2 have shown that the remnants of destroyed planets and debris-disk planetesimals can survive the volatile evolution of their host stars into white dwarfs3,4, but few intact planetary bodies around white dwarfs have been detected5–8. Simulations
J. Blackman +15 more
semanticscholar +8 more sources
Properties and Evolution of White Dwarf Stars [PDF]
Symposium - International Astronomical Union, 1989 This paper reviews the properties and evolutionary status of white dwarf stars, focusing most closely on those aspects which are likely to be of significance to understanding the ultimate fate of planetary nebulae and their central stars. White dwarf stars show a broad variety of chemical compositions.
H. L. Shipman
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Lithium production in the merging of white dwarf stars [PDF]
Astronomy & Astrophysics, 2012 The origin of R Coronae Borealis stars has been elusive for over 200 years. Currently, two theories for their formation have been presented. These are the Final Flash scenario, in which a dying asymptotic giant branch (AGB) star throws o its atmosphere ...
R. Longland +4 more
semanticscholar +7 more sources
The age and colors of massive white dwarf stars [PDF]
Astronomy & Astrophysics, 2007 We present evolutionary calculations and colors for massive white dwarfs with oxygen-neon cores for masses between 1.06 and 1.28 Mo. The evolutionary stages computed cover the luminosity range from log(L/Lo) approx. 0.5 down to -5.2. Our cooling sequences are based on evolutionary calculations that take into account the chemical composition expected ...
L. G. Althaus +4 more
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On the Spectral Evolution of Hot White Dwarf Stars. II. Time-dependent Simulations of Element Transport in Evolving White Dwarfs with STELUM [PDF]
Astrophysical Journal, 2021 White dwarf stars are subject to various element transport mechanisms that can cause their surface composition to change radically as they cool, a phenomenon known as spectral evolution.
A. Bédard +3 more
semanticscholar +1 more source