Results 51 to 60 of about 1,914,179 (372)
Convective overshoot and macroscopic diffusion in pure-hydrogen-atmosphere white dwarfs [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We present a theoretical description of macroscopic diffusion caused by convective overshoot in pure-hydrogen DA white dwarfs using 3D, closed-bottom, radiation hydrodynamics co5bold simulations.
T. Cunningham +4 more
semanticscholar +1 more source
White dwarfs as dark matter detectors [PDF]
Physical Review D, 2018 Dark matter that is capable of sufficiently heating a local region in a white dwarf will trigger runaway fusion and ignite a type Ia supernova. This was originally proposed in Graham et al.
P. Graham +4 more
semanticscholar +1 more source
A White Dwarf Search Model Based on a Deep Transfer-learning Method
The Astrophysical Journal Supplement Series, 2023 White dwarfs represent the ultimate stage of evolution for over 97% of stars and play a crucial role in studies of the Milky Way’s structure and evolution.
Lei Tan +5 more
doaj +1 more source
A Systematic Study of the Connection Between White Dwarf Period Spectra and Model Structure
The Astrophysical Journal, 2023 To date, pulsational variability has been measured for nearly 70 pulsating helium-atmosphere white dwarfs (DBVs) and 500 pulsating hydrogen-atmosphere white dwarfs (DAVs), with only a fraction of these having been the subject of asteroseismic analysis ...
Agnès Bischoff-Kim
doaj +1 more source
On the Spectral Evolution of Helium-atmosphere White Dwarfs Showing Traces of Hydrogen [PDF]
, 2018 We present a detailed spectroscopic analysis of 115 helium-line (DB) and 28 cool, He-rich hydrogen-line (DA) white dwarfs based on atmosphere fits to optical spectroscopy and photometry.
B. Rolland, P. Bergeron, G. Fontaine
semanticscholar +1 more source
, 2022 48 pages, 6 figures, Invited (and accepted) chapter for the Handbook of X-ray and Gamma-ray Astrophysics, Editors: Cosimo Bambi, Andrea ...
openaire +2 more sources
Symposium - International Astronomical Union, 1974 The effects of core crystallization and of convection in the envelope on the cooling of white dwarfs are reviewed. The case of a 0.6 M⊙ white dwarf composed of an oxygen core and a helium envelope is taken as example. Also the amount of hydrogen that a white dwarf can accrete before nuclear burning occurs is estimated and possible evolutionary ...
openaire +1 more source
EPJ Web of Conferences, 2013 The recognition that planets may survive the late stages of stellar evolution, and the prospects for finding them around White Dwarfs, are growing. We discuss two aspects governing planetary survival through stellar evolution to the White Dwarf stage. First we discuss the case of a single planet, and its survival under the effects of stellar mass loss,
Dimitri Veras +4 more
openaire +3 more sources
The Possible White Dwarf-Neutron Star Connection [PDF]
, 1997 The current status of the problem of whether neutron stars can form, in close binary systems, by accretion-induced collapse (AIC) of white dwarfs is examined. We find that, in principle, both initially cold C+O white dwarfs in the high-mass tail of their
C Ritossa +27 more
core +2 more sources
Fundamental parameter accuracy of DA and DB white dwarfs inGaiaData Release 2 [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We report on a comparison of spectroscopic analyses for hydrogen (DA) and helium atmosphere (DB) white dwarfs with Gaia Data Release 2 (DR2) parallaxes and photometry.
P. Tremblay +4 more
semanticscholar +1 more source