Results 11 to 20 of about 1,914,179 (372)
White dwarfs and revelations [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 We use the most recent, complete and independent measurements of masses and radii of white dwarfs in binaries to bound the class of non-trivial modified gravity theories, viable after GW170817/GRB170817, using its effect on the mass-radius relation of ...
I. Saltas, I. Sawicki, I. Lopes
semanticscholar +5 more sources
Stark Broadening and White Dwarfs [PDF]
Open Astronomy, 2011 White dwarf and pre-white dwarfs are the best types of stars for the application of Stark broadening research results in astrophysics, since in the atmospheres of these stars physical conditions are very favorable for this line broadening mechanism - in ...
Dimitrijević Milan S. +3 more
doaj +6 more sources
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
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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
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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
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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
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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
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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
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White Dwarf and Pre-White Dwarf Pulsations [PDF]
AIP Conference Proceedings, 2009 In this review I describe the basic properties of white dwarfs and their pulsations. I then discuss some of the areas in which the pulsations can provide meaningful results, such as internal chemical profiles, possible emission of “exotic” particles, planet detection, crystallization, convection, accretion, and cosmochronology.
M. H. Montgomery +2 more
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UBVR Photometry of white dwarfs and white dwarfs suspects [PDF]
Publications of the Astronomical Society of the Pacific, 1972 Photoelectric UBVr photometry is presented for 33 white-dwarf suspects from the Lowell Observatory lists. On the basis of (B- V) and (U- B) color indices, eight probable white dwarfs are identffied.
Richard D. Schwartz
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