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DETECTION OF A WHITE DWARF COMPANION TO THE WHITE DWARF SDSSJ125733.63+542850.5 [PDF]
The Astrophysical Journal, 2011 SDSSJ125733.63+542850.5 (hereafter SDSSJ1257+5428) is a compact white dwarf binary from the Sloan Digital Sky Survey that exhibits high-amplitude radial velocity variations on a period of 4.56 hours. While an initial analysis suggested the presence of a neutron star or black-hole binary companion, a follow-up study concluded that the spectrum was ...
Marsh, T. R. +6 more
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ON THE EVOLUTION OF MAGNETIC WHITE DWARFS [PDF]
The Astrophysical Journal, 2015 We present the first radiation magnetohydrodynamics simulations of the atmosphere of white dwarf stars. We demonstrate that convective energy transfer is seriously impeded by magnetic fields when the plasma-beta parameter, the thermal to magnetic pressure ratio, becomes smaller than unity.
P.-E. Tremblay +7 more
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Simulation of the white dwarf–white dwarf galactic background in the LISA data [PDF]
Classical and Quantum Gravity, 2005 14 pages and 6 figures. Submitted to Classical and Quantum Gravity (Proceedings of GWDAW9)
Edlund, J. +3 more
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White Dwarf and Pre-White Dwarf Oscillations [PDF]
International Astronomical Union Colloquium, 1993 AbstractCompact stars that result from extreme mass loss on the asymptotic giant branch and planetary nebula formation are observed to pulsate in a very large surface effective temperature range as they cool to become the classical white dwarfs. The hottest and most luminous of these display periods in excess of 1000 seconds because they are large, but
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, 2022 48 pages, 6 figures, Invited (and accepted) chapter for the Handbook of X-ray and Gamma-ray Astrophysics, Editors: Cosimo Bambi, Andrea ...
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The DB gap and a new class of pulsating white dwarfs
EPJ Web of Conferences, 2013 The recent systematic surveys providing enormously massive datasets of white dwarfs show that there is still a deficit of a factor of 2.5 in the DA/non-DA ratio within the temperature range of 30 000 K < Teff < 45 000 K, which has been regarded as the ...
Shibahashi H.
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Universe, 2023 In 1995, Glendenning, Kettner and Weber postulated the existence of a new class of compact stars resembling white dwarfs but containing a small strange quark-matter core surrounded by hadronic layers attaining much higher densities than those found in ...
Loïc Perot, Nicolas Chamel
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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
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Stellar equilibrium configurations of white dwarfs in the f(R, T) gravity
European Physical Journal C: Particles and Fields, 2017 In this work we investigate the equilibrium configurations of white dwarfs in a modified gravity theory, namely, f(R, T) gravity, for which R and T stand for the Ricci scalar and trace of the energy-momentum tensor, respectively.
G. A. Carvalho +6 more
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White Dwarf Cooling Curves and Searches For White Dwarfs [PDF]
Highlights of Astronomy, 1998 White dwarf (WD) evolution is essentially a cooling problem in two parts. Degenerate electrons in the core provide the support while non-degenerate C and O ions provide the thermal reservoir (Koester & Chanmugam 1990, Kawaler 1996). The rate of energy loss through the non-degenerate envelope of H and He—segregated by gravitational settling—is ...
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