Axions and the Cooling of White Dwarf Stars [PDF]
The Astrophysical Journal, 2008 White dwarfs are the end-product of the lifes of intermediate- and low-mass stars and their evolution is described as a simple cooling process. Recently, it has been possible to determine with an unprecedented precision their luminosity function, that is, the number of stars per unit volume and luminosity interval.
Silvia Catalan +3 more
openaire +3 more sources
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
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
Asteroseismological study of massive ZZ Ceti stars with fully evolutionary models [PDF]
, 2013 We present the first asteroseismological study for 42 massive ZZ Ceti stars based on a large set of fully evolutionary carbon$-$oxygen core DA white dwarf models characterized by a detailed and consistent chemical inner profile for the core and the ...
Althaus, L. G. +4 more
core +4 more sources
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
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
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
Characterizing the Chemistry of Planetary Materials Around White Dwarf Stars [PDF]
, 2017 Planetary systems that orbit white dwarf stars can be studied via spectroscopic observations of the stars themselves. Numerous white dwarfs are seen to have accreted mostly rocky minor planets, the remnants of which are present in the stellar ...
B. Zuckerman, Edward D. Young
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