Deposition of steeply infalling debris around white dwarf stars [PDF]
, 2017 High-metallicity pollution is common in white dwarf (WD) stars hosting remnant planetary systems. However, they rarely have detectable debris accretion discs, possibly because much of the influx is fast steeply-infalling debris in star-grazing orbits ...
JOHN C. Brown, D. Veras, B. Gaensicke
semanticscholar +1 more source
Eclipsing binary and white dwarf features associated with K2 target EPIC251248385 [PDF]
, 2019 White dwarfs, remnants of Sun-like stars which have completed their evolution, are one of the most common types of stars in space. Despite this, very few white dwarfs have been observed in transiting or eclipsing systems, and only two planetary systems ...
Armstrong, James D. +5 more
core +1 more source
Numerical Simulations of Collisional Cascades at the Roche Limits of White Dwarf Stars [PDF]
, 2017 We consider the long-term collisional and dynamical evolution of solid material orbiting in a narrow annulus near the Roche limit of a white dwarf.
S. Kenyon, B. Bromley
semanticscholar +1 more source
Numerical Simulations of Gaseous Disks Generated from Collisional Cascades at the Roche Limits of White Dwarf Stars [PDF]
, 2017 We consider the long-term evolution of gaseous disks fed by the vaporization of small particles produced in a collisional cascade inside the Roche limit of a 0.6 white dwarf. Adding solids with radius at a constant rate into a narrow annulus leads to two
S. Kenyon, B. Bromley
semanticscholar +1 more source
The White Dwarf Initial–Final Mass Relation for Progenitor Stars from 0.85 to 7.5 M⊙ [PDF]
Astrophysical Journal, 2018 We present the initial–final mass relation (IFMR) based on the self-consistent analysis of Sirius B and 79 white dwarfs from 13 star clusters. We have also acquired additional signal on eight white dwarfs previously analyzed in the NGC 2099 cluster field,
J. Cummings +4 more
semanticscholar +1 more source
HST Spectra of GW Librae: A Hot Pulsating White Dwarf in a Cataclysmic Variable [PDF]
, 2002 We have obtained Hubble Space Telescope UV spectra of the white dwarf in GW Lib, the only known non-radially pulsating white dwarf in a cataclysmic variable, and the first known DAZQ variable. The UV light curve reveals large amplitude (10%) pulsationsin
Boris T. Gänsicke +4 more
core +3 more sources
White dwarf stars in modified gravity [PDF]
International Journal of Geometric Methods in Modern Physics, 2021 A few questions related to white dwarfs’ physics is posed. It seems that the modified gravity framework can be a good starting point to provide alternative explanations to cooling processes, their age determination, and Chandrasekhar mass limits. Moreover, we have also obtained the Chandrasekhar limit coming from Palatini [Formula: see text] gravity ...
openaire +4 more sources
Probing the Gravitational Dependence of the Fine-Structure Constant from Observations of White Dwarf Stars [PDF]
, 2017 Hot white dwarf stars are the ideal probe for a relationship between the fine-structure constant and strong gravitational fields, providing us with an opportunity for a direct observational test.
M. Bainbridge +14 more
semanticscholar +1 more source
Asteroseismology of pulsating DA white dwarfs with fully evolutionary models
EPJ Web of Conferences, 2013 We present a new approach for asteroseismology of DA white dwarfs that consists in the employment of a large set of non-static, physically sound, fully evolutionary models representative of these stars.
Althaus L.G. +3 more
doaj +1 more source
The Astrophysical Journal, 2023 AllS single stars that are born with masses up to 8.5–10 M _⊙ will end their lives as white dwarf (WD) stars. In this evolutionary stage, WDs enter the cooling sequence, where the stars radiate away their thermal energy and are basically cooling.
Weston Hall +2 more
doaj +1 more source