Results 51 to 60 of about 114,517 (388)
The age-metallicity dependence for white dwarf stars [PDF]
, 2015 We present a theoretical study on the metallicity dependence of the initial to final mass relation and its influence on white dwarf age determinations.
A. Romero, F. Campos, S. O. Kepler
semanticscholar +1 more source
A New Generation of Cool White Dwarf Atmosphere Models. I. Theoretical Framework and Applications to DZ Stars [PDF]
Astrophysical Journal, 2018 The photospheres of the coolest helium-atmosphere white dwarfs are characterized by fluidlike densities. Under those conditions, standard approximations used in model atmosphere codes are no longer appropriate. Unfortunately, the majority of cool He-rich
S. Blouin, P. Dufour, N. Allard
semanticscholar +1 more source
A Search for Jovian Planets around Hot White Dwarfs [PDF]
, 2000 Current searches for extrasolar planets have concentrated on observing the reflex Doppler shift of solar-type stars. Little is known, however, about planetary systems around non-solar-type stars.
Bryan C. Dunne +5 more
core +2 more sources
Pulsations in white dwarf stars [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractWe first present a brief description of the six distinct families of pulsating white dwarfs that are now known. These are all opacity-driven pulsators showing low- to mid-order, low-degree gravity modes. We then discuss some recent highlights that have come up in the field of white dwarf asteroseismology.
Gilles Fontaine +7 more
openaire +2 more sources
New white dwarf stars in the Sloan Digital Sky Survey Data Release 10 [PDF]
, 2014 We report the discovery of 9 089 new spectroscopically confirmed white dwarfs and subdwarfs in the Sloan Digital Sky Survey Data Release 10. We obtain Teff, log g and mass for hydrogen atmosphere white dwarf stars (DAs) and helium atmosphere white dwarf ...
S. O. Kepler +13 more
semanticscholar +1 more source
Limits on a gravitational field dependence of the proton-electron mass ratio from H2 in white dwarf stars. [PDF]
Physical Review Letters, 2014 Spectra of molecular hydrogen (H2) are employed to search for a possible proton-to-electron mass ratio (μ) dependence on gravity. The Lyman transitions of H2, observed with the Hubble Space Telescope towards white dwarf stars that underwent a ...
J. Bagdonaite +11 more
semanticscholar +1 more source
The mass ratio distribution of short period double degenerate stars [PDF]
, 2002 Short period double degenerates (DDs) are close white dwarf - white dwarf binary stars which are the result of the evolution of interacting binary stars.
Marsh, T. R. +2 more
core +2 more sources
ELM of ELM-WD: An Extremely-low-mass Hot Star Discovered in LAMOST Survey
The Astronomical Journal, 2023 The extremely-low-mass white dwarfs (ELM WDs) and pre-ELM WDs are helium-core white dwarfs with mass
Hailong Yuan (袁海龙) +9 more
doaj +1 more source
Frontiers in Astronomy and Space Sciences, 2022 In this research, first considering the electron–electron interaction in the high-density Fermi electron gas at T = 0 K, this interaction causes the pressure 2/137 time less than the original value.
Ting-Hang Pei
doaj +1 more source
Methods of asteroseismology for white dwarf stars
Open Astronomy, 1993 Bradley P.A.
doaj +3 more sources