Results 11 to 20 of about 5,483 (223)
The dB and gK Stars Near the Direction of the Galactic Center
Journal of Mathematical and Fundamental Sciences, 2019 . An objective prism survey of the Palomar-Groningen Variable-Stars Field no. 3 has been undertaken in order to determine the stellar space distribution of dB and gK stars.
B. Hidajat, I. Radiman
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Results on (UN)Published Wet Runs on Pulsating DB White Dwarfs [PDF]
Open Astronomy, 2003 I have collected all the WET archival data on the pulsating DB white dwarf stars (DBVs) and re-reduced them. In addition, the WET has recently observed three DBVs.
Handler G.
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An Example Demonstrating the Potential for Asteroseismology of DB White Dwarf Stars [PDF]
International Astronomical Union Colloquium, 1993 AbstractWe present the results of a parametric survey of evolutionary models of compositionally stratified white dwarfs with helium surface layers (DB white dwarfs). Because white dwarfs are the most common final end state of stellar evolution, determining their internal structure will offer us many clues about stellar evolution, the physics of matter ...
P.A. Bradley, M.A. Wood
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MULTIWAVELENGTH OBSERVATIONS OF THE HOT DB STAR PG 0112+104 [PDF]
The Astrophysical Journal, 2010 10 pages in emulateapj, 9 figures, accepted for publication in ...
Dufour, P. +10 more
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The rate of period change in pulsating DB white dwarf stars [PDF]
Astronomy & Astrophysics, 2004 13 pages, including 5 postscript figures and 9 tables.
Córsico, Alejandro Hugo +1 more
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Gravity and limb-darkening coefficients for compact stars: DA, DB, and DBA eclipsing white dwarfs [PDF]
Astronomy & Astrophysics, 2020 Context. The distribution of the specific intensity over the stellar disk is an essential tool for modeling the light curves in eclipsing binaries, planetary transits, and stellar diameters through interferometric techniques, line profiles in rotating stars, gravitational microlensing, etc.
Claret, A. +5 more
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New Chondritic Bodies Identified in Eight Oxygen-bearing White Dwarfs
The Astrophysical Journal, 2023 We present observations and analyses of eight white dwarf stars (WDs) that have accreted rocky material from their surrounding planetary systems. The spectra of these helium-atmosphere WDs contain detectable optical lines of all four major rock-forming ...
Alexandra E. Doyle +10 more
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The Astrophysical Journal, 2023 In the framework of our extensive modeling study of the spectral evolution of white dwarfs, we present here a new set of detailed calculations of the transport of residual hydrogen in helium-rich white dwarfs. First, we investigate the so-called float-up
A. Bédard, P. Bergeron, P. Brassard
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A search for a new class of pulsating DA white dwarf stars in the DB gap [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 While white dwarf stars are classified into many subgroups based on the appearance of hydrogen, helium, carbon, oxygen and other spectral lines – or even pure continuum with no lines in the case of the DC stars – the vast majority fall into two major subgroups: those with hydrogen atmospheres (the DA white dwarfs), and those with helium atmospheres ...
D. W. Kurtz +4 more
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The pulsational properties of ultra-massive DB white dwarfs with carbon-oxygen cores coming from single-star evolution [PDF]
Astronomy & Astrophysics, 2021 Context. Ultra-massive white dwarfs are relevant for many reasons: their role as type Ia supernova progenitors, the occurrence of physical processes in the asymptotic giant branch phase, the existence of high-field magnetic white dwarfs, and the occurrence of double white dwarf mergers.
Córsico, Alejandro H. +3 more
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