Results 71 to 80 of about 5,486 (209)
A Catalog of Spectroscopically Confirmed White Dwarfs from the Sloan Digital Sky Survey Data Release 4 [PDF]
, 2006 We present a catalog of 9316 spectroscopically confirmed white dwarfs from the Sloan Digital Sky Survey Data Release 4. We have selected the stars through photometric cuts and spectroscopic modeling, backed up by a set of visual inspections. Roughly 6000
Atsuko Nitta +19 more
core +2 more sources
The population of hot subdwarf stars studied withGaia [PDF]
Astronomy & Astrophysics, 2017 In preparation for the upcoming all-sky data releases of the Gaia mission we compiled a catalogue of known hot subdwarf stars and candidates drawn from the literature and yet unpublished databases. The catalogue contains 5613 unique sources and provides multi-band photometry from the ultraviolet to the far infrared, ground based proper motions ...
Geier S. +7 more
openaire +3 more sources
Constraining Roche-Lobe Overflow Models Using the Hot-Subdwarf Wide Binary Population
Open Astronomy, 2017 One of the important issues regarding the final evolution of stars is the impact of binarity. A rich zoo of peculiar, evolved objects are born from the interaction between the loosely bound envelope of a giant, and the gravitational pull of a companion ...
Vos Joris, Vučković Maja
doaj +1 more source
New Pulse Timing Measurements of the sdBV Star CS 1246
Open Astronomy, 2017 CS 1246 is a hot subdwarf B star discovered in 2009 to exhibit a single, large-amplitude radial pulsation. An O-C diagram constructed from this mode revealed reflex motion due to the presence of a low-mass M dwarf, as well as a long-term trend consistent
Hutchens Zackary L. +7 more
doaj +1 more source
Astronomy & AstrophysicsContext. Hot subdwarf B (sdB) stars in close binaries with white dwarf (WD) companions are potential progenitors of double-detonation thermonuclear supernovae.
Hernandez Mercedes S. +3 more
doaj +1 more source
On the 3He anomaly in hot subdwarf B stars
Open Astronomy, 2017 Decades ago, 3He isotope enrichment in helium-weak B-type main-sequence, in blue horizontal branch and in hot subdwarf B (sdB) stars, i.e., helium-core burning stars of the extreme horizontal branch, were discovered. Diffusion processes in the atmosphere
Schneider David +4 more
doaj +1 more source
Odessa Astronomical Publications, 2011 The data about occurrence frequency of substars and white dwarfs among close stars are analyzed. The estimation of partial content of subdwarfs and stellar remains among populations II and III as function of power of initial mass function have been made.
В. А. Захожай +2 more
doaj +1 more source
The First Substellar Subdwarf? Discovery of a Metal-poor L Dwarf with Halo Kinematics
, 2003 We present the discovery of the first L-type subdwarf, 2MASS J05325346+8246465. This object exhibits enhanced collision-induced H$_2$ absorption, resulting in blue NIR colors ($J-K_s = 0.26{\pm}0.16$). In addition, strong hydride bands in the red optical
Adam Burrows +20 more
core +1 more source
Abundance analysis of a nitrogen-rich extreme-helium hot subdwarf from the SALT survey [PDF]
, 2023 L. J. A. Scott. +4 more
openalex +3 more sources
Spectroscopic follow-up of hot subdwarf variables found in ZTF
Astronomy & AstrophysicsContext. Hot subdwarf variables (sdBVs) that display large-amplitude (> 1%) short-period variability as a result of radial-mode pulsations have recently become objects of interest, as they show unique properties among the sdBV classes.
Bradshaw Corey W. +4 more
doaj +1 more source