Results 11 to 20 of about 1,877,533 (362)
A catalogue of white dwarfs in Gaia EDR3 [PDF]
Monthly notices of the Royal Astronomical Society, 2021 We present a catalogue of white dwarf candidates selected from Gaia early data release three (EDR3). We applied several selection criteria in absolute magnitude, colour, and Gaia quality flags to remove objects with unreliable measurements while ...
N. G. Fusillo +9 more
semanticscholar +1 more source
Improved treatment of dark matter capture in white dwarfs [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 White dwarfs, the most abundant stellar remnants, provide a promising means of probing dark matter interactions, complimentary to terrestrial searches. The scattering of dark matter from stellar constituents leads to gravitational capture, with important
N. Bell +4 more
semanticscholar +1 more source
The origin and evolution of magnetic white dwarfs in close binary stars [PDF]
Nature Astronomy, 2021 The origin of magnetic fields in white dwarfs remains a fundamental unresolved problem in stellar astrophysics. In particular, the very different fractions of strongly (more than about a megagauss) magnetic white dwarfs in evolutionarily linked ...
M. Schreiber +4 more
semanticscholar +1 more source
On the Spectral Evolution of Hot White Dwarf Stars. I. A Detailed Model Atmosphere Analysis of Hot White Dwarfs from SDSS DR12 [PDF]
Astrophysical Journal, 2020 As they evolve, white dwarfs undergo major changes in surface composition, a phenomenon known as spectral evolution. In particular, some stars enter the cooling sequence with helium atmospheres (type DO) but eventually develop hydrogen atmospheres (type ...
A. Bédard +3 more
semanticscholar +1 more source
Ultra-low-mass and small-radius white dwarfs made of heavy elements
Frontiers in Astronomy and Space Sciences, 2023 Seven possible ultra-low-mass and small-radius white dwarfs have been recently identified, with masses ranging from ∼0.02 M⊙ to ∼0.08 M⊙ and radii ranging from ∼ 4,270 km to 10670 km.
Cheng-Jun Xia +8 more
doaj +1 more source
Gaia white dwarfs within 40 pc II: the volume-limited Northern hemisphere sample [PDF]
, 2020 We present an overview of the sample of northern hemisphere white dwarfs within 40 pc of the Sun detected from $Gaia$ Data Release 2 (DR2). We find that 521 sources are spectroscopically confirmed degenerate stars, 111 of which were first identified as ...
J. McCleery +8 more
semanticscholar +1 more source
Gaia white dwarfs within 40 pc – I. Spectroscopic observations of new candidates [PDF]
Monthly notices of the Royal Astronomical Society, 2020 We present a spectroscopic survey of 230 white dwarf candidates within 40 pc of the Sun from the William Herschel Telescope and Gran Telescopio Canarias.
P. Tremblay +32 more
semanticscholar +1 more source
Proceedings of Supernovae: lights in the darkness — PoS(SUPERNOVA), 2008 Thermonuclear (type Ia) supernovae are explosions in accreting white dwarfs, but the exact scenario leading to these explosions is still unclear. An important step to clarify this point is to understand the behaviour of accreting white dwarfs in close binary systems.
Hernanz, Margarita, José, Jordi
openaire +4 more sources
The frequency of gaseous debris discs around white dwarfs [PDF]
, 2020 A total of 1–3 per cent of white dwarfs are orbited by planetary dusty debris detectable as infrared emission in excess above the white dwarf flux. In a rare subset of these systems, a gaseous disc component is also detected via emission lines of the Ca ...
C. Manser +7 more
semanticscholar +1 more source
I Spy Transits and Pulsations: Empirical Variability in White Dwarfs Using Gaia and the Zwicky Transient Facility [PDF]
, 2020 We present a novel method to detect variable astrophysical objects and transient phenomena using anomalous excess scatter in repeated measurements from public catalogs of Gaia DR2 and Zwicky Transient Facility (ZTF) DR3 photometry.
J. A. Guidry +15 more
semanticscholar +1 more source