Results 1 to 10 of about 172,722 (314)
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 Release 13 in 2016, which lead to the increase in the number of spectroscopically identified white dwarf
Gustavo Ourique +3 more
arxiv +5 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
openaire +3 more sources
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
doaj +3 more sources
Detached white-dwarf close-binary stars -- CV's extended family [PDF]
, 1999 I review detached binaries consisting of white dwarfs with either other white dwarfs or low mass main-sequence stars in tight orbits around them. Orbital periods have been measured for 15 white dwarf/white dwarf systems and 22 white dwarf/M dwarf systems.
T. R. Marsh
arxiv +3 more sources
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
SED Signatures of Jovian Planets Around White Dwarf Stars [PDF]
arXiv, 2001 The problem of detecting Jovian-sized planets orbiting White Dwarf stars is considered. Significant IR excesses result from warm Jupiters orbiting a White Dwarf of $T_{\rm eff}=10000$ K at a distance of $\sim 10^3$ White Dwarf radii (corresponding to $\sim 10^2$ Jupiter radii or a few tenths of an AU) with an orbital period of $\sim 100$ days.
Richard Ignace
arxiv +3 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
openaire +3 more sources
A Determination of the Local Density of White Dwarf Stars [PDF]
, 2001 The most recent version of the Catalog of Spectroscopically Identified White Dwarfs lists 2249 white dwarf stars. Among these stars are 118 white dwarfs that have either reliable trigonometric parallaxes or color-based distance moduli which place them at a distance within 20 pc of the Sun.
J. B. Holberg, T. D. Oswalt, E. M. Sion
arxiv +3 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 ...
Jordi Isern +6 more
openaire +6 more sources
A Chondritic Solar Neighborhood
The Planetary Science Journal, 2023 A persistent question in exoplanet demographics is whether exoplanetary systems form from similar compositional building blocks to our own. Polluted white dwarf stars offer a unique way to address this question, as they provide measurements of the bulk ...
Isabella L. Trierweiler +2 more
doaj +1 more source