Results 51 to 60 of about 116,162 (381)
SDSS J142625.71+575218.3: A Prototype for A New Class of Variable White Dwarf [PDF]
, 2008 We present the results of a search for pulsations in six of the recently discovered carbon-atmosphere white dwarf ("hot DQ") stars. On the basis of our theoretical calculations, the star SDSS J142625.71 + 575218.3 is the only object expected to pulsate ...
DeGennaro, Steven +5 more
core +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
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
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
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
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
Evolutionary and Pulsational Properties of Ultra-massive White Dwarfs. The Role of Oxygen-Neon Phase Separation. [PDF]
, 2018 The 21st European Workshop on White Dwarfs was held in Austin, TX from July 23rd to 27th of 2018Ultra-massive hydrogen-rich white dwarf stars are expected to harbour oxygen/neon cores resulting from semidegenerate carbon burning when the progenitor ...
Althaus, L.G. +3 more
core +2 more sources
The Physical Nature of Subdwarf A Stars: White Dwarf Impostors [PDF]
, 2017 We address the physical nature of subdwarf A-type (sdA) stars and their possible link to extremely low mass (ELM) white dwarfs (WDs). The two classes of objects are confused in low-resolution spectroscopy. However, colors and proper motions indicate that
Warren R. Brown, M. Kilic, A. Gianninas
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