Results 1 to 10 of about 74,403 (250)
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
openaire +3 more sources
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.
doaj +7 more sources
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
doaj +1 more source
Towards Ensemble Asteroseismology of the Pulsating DB White Dwarf Stars [PDF]
International Astronomical Union Colloquium, 2002 The origin of the helium-atmosphere DB white dwarfs is still a matter of debate. In particular, the question is unresolved whether binary evolution produces a significant number of DBs. The pulsating DB white dwarfs (DBV stars) offer a complementary insight into this problem through asteroseismology; DBs descending from binaries will have different ...
G. Handler, M.A. Wood, A. Nitta
openaire +2 more sources
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
openaire +6 more sources
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
doaj +1 more source
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
openaire +4 more sources
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
doaj +1 more source
Seismic Cartography of White-Dwarf Interiors From the Toulouse-Montréal Optimal-Design Approach
Frontiers in Astronomy and Space Sciences, 2022 Probing internal properties of white-dwarf stars has been amongst the earliest objectives of asteroseismology, following the first discovery in the late 1960s of non-radial pulsations in these evolved compact stars.
Noemi Giammichele +2 more
doaj +1 more source
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
openaire +6 more sources