White dwarf and subdwarf stars in the Sloan Digital Sky Survey Data Release 16 [PDF]
Monthly notices of the Royal Astronomical Society, 2019 White dwarfs are the end state of the evolution of more than 97 per cent of all stars, and therefore carry information on the structure and evolution of the Galaxy through their luminosity function and initial-to-final mass relation.
S. O. Kepler +8 more
semanticscholar +5 more sources
Stark Broadening and White Dwarfs [PDF]
Open Astronomy, 2011 White dwarf and pre-white dwarfs are the best types of stars for the application of Stark broadening research results in astrophysics, since in the atmospheres of these stars physical conditions are very favorable for this line broadening mechanism - in ...
Dimitrijević Milan S. +3 more
doaj +4 more sources
White Dwarf.Org - Establishing a Permanent Endowment for the Whole Earth Telescope [PDF]
Open Astronomy, 2003 White Dwarf Research Corporation is a non-profit organization dedicated to scientific research and public education on topics relevant to white dwarf stars.
Metcalfe Travis S.
doaj +4 more sources
Constraints on light dark matter particles using white dwarf stars [PDF]
International Journal of Modern Physics D, 2020 We report constraints on the nucleon-dark matter particle cross-section using the internal luminosity of observed white dwarf stars in the globular cluster Messier 4.
Grigoris Panotopoulos, Ilídio Lopes
openalex +3 more sources
An overview of white dwarf stars
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 +2 more sources
X-Ray Signatures of Axion Conversion in Magnetic White Dwarf Stars [PDF]
Physical Review Letters, 2019 White dwarf (WD) stars may radiate keV-energy axions produced in their stellar cores. This has been extensively studied as an extra channel by which WDs may cool, with some analyses even suggesting that axions can help explain the observed WD luminosity ...
Christopher Dessert +2 more
openalex +3 more sources
The white dwarf binary pathways survey – I. A sample of FGK stars with white dwarf companions [PDF]
, 2016 The number of spatially unresolved white dwarf plus main-sequence star binaries has increased rapidly in the last decade, jumping from only ∼30 in 2003 to over 3000. However, in the majority of known systems the companion to the white dwarf is a low-mass
S. G. Parsons +5 more
openalex +3 more sources
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
On the Spectral Evolution of Hot White Dwarf Stars. I. A Detailed Model Atmosphere Analysis of Hot White Dwarfs from SDSS DR12 [PDF]
Astrophysical Journal, 2020 As they evolve, white dwarfs undergo major changes in surface composition, a phenomenon known as spectral evolution. In particular, some stars enter the cooling sequence with helium atmospheres (type DO) but eventually develop hydrogen atmospheres (type ...
A. Bédard +3 more
semanticscholar +1 more source
Barium and related stars, and their white-dwarf companions [PDF]
Astronomy & Astrophysics, 2019 Barium (Ba) dwarfs and CH subgiants are the less evolved analogues of Ba and CH giants. They are F- to G-type main-sequence stars polluted with heavy elements by their binary companions when the companion was on the asymptotic giant branch (AGB).
A. Escorza +14 more
openalex +3 more sources