Results 21 to 30 of about 112,298 (365)
New full evolutionary sequences of H- and He-atmosphere massive white dwarf stars using mesa [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We explore the evolution of hydrogen-rich and hydrogen-deficient white dwarf stars with masses between 1.012 and 1.307 Msun, and initial metallicity of Z=0.02.
G. R. Lauffer, A. Romero, S. O. Kepler
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Catalog of Magnetic White Dwarfs with Hydrogen Dominated Atmospheres
The Astrophysical Journal, 2023 White dwarfs are excellent research laboratories as they reach temperatures, pressures, and magnetic fields that are unattainable on Earth. To better understand how these three physical parameters interact with each other and with other stellar features,
L. L. Amorim +4 more
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Relativistic Tidal Disruption and Nuclear Ignition of White Dwarf Stars by Intermediate-mass Black Holes [PDF]
Astrophysical Journal, 2018 We present results from general relativistic calculations of the tidal disruption of white dwarf stars from near encounters with intermediate-mass black holes. We follow the evolution of 0.2 M⊙ and 0.6 M⊙ stars on parabolic trajectories that approach 103–
P. Anninos +7 more
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Pulsation properties of ultra-massive DA white dwarf stars with ONe cores [PDF]
Astronomy & Astrophysics, 2018 Context. Ultra-massive hydrogen-rich white dwarf stars are expected to harbor oxygen/neon cores resulting from the progenitor evolution through the super-asymptotic giant branch phase.
F. D. Ger'onimo +4 more
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The Astrophysical Journal Letters, 2023 ASASSN-V J205543.90+240033.5 (ASJ2055) is a possible post-common-envelope binary system. Its optical photometric data show an orbital variation of about 0.52 days and a fast period modulation of P _0 ∼ 9.77 minutes, whose origin is unknown.
J. Takata +9 more
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Diffusion of neon in white dwarf stars [PDF]
Physical Review E, 2010 Sedimentation of the neutron rich isotope $^{22}$Ne may be an important source of gravitational energy during the cooling of white dwarf stars. This depends on the diffusion constant for $^{22}$Ne in strongly coupled plasma mixtures. We calculate self-diffusion constants $D_i$ from molecular dynamics simulations of carbon, oxygen, and neon mixtures. We
J. Hughto +3 more
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Upper limit on the axion-photon coupling from magnetic white dwarf polarization [PDF]
Physical Review D, 2022 Polarization measurements of thermal radiation from magnetic white dwarf (MWD) stars have been proposed as a probe of axion-photon mixing. The radiation leaving the surface of the MWD is unpolarized, but if low-mass axions exist then photons polarized ...
Christopher Dessert, D. Dunsky, B. Safdi
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Maximum mass ratio of AM CVn-type binary systems and maximum white dwarf mass in ultra-compact X-ray binaries [PDF]
Serbian Astronomical Journal, 2011 AM CVn-type stars and ultra-compact X-ray binaries are extremely interesting semi-detached close binary systems in which the Roche lobe filling component is a white dwarf transferring mass to another white dwarf, neutron star or a black hole ...
Arbutina Bojan
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White dwarf stars with carbon atmospheres [PDF]
Nature, 2007 White dwarfs represent the endpoint of stellar evolution for stars with initial masses between approximately 0.07 and 8-10, where is the mass of the Sun (more massive stars end their life as either black holes or neutron stars). The theory of stellar evolution predicts that the majority of white dwarfs have a core made of carbon and oxygen, which ...
Dufour, Patrick +3 more
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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
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