Results 121 to 130 of about 2,620,915 (156)
Multi-wavelength observations of cataclysmic variable stars [PDF]
Observations of the cataclysmic variable systems EX Dra, Z Cha, and OY Car using multi-wavelength data ranging from near-infrared to X-ray bands are presented and analysed. Obscuration of the white dwarf by intervening material is discussed in context of all three systems, including the confirmation of iron lines in the spectrum of OY Car and the ...
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A spectroscopic analysis of three cataclysmic variable stars [PDF]
, 2005 Cataclysmic variable stars (CVs) are binary systems in which matter is transferred from a low mass star to a white dwarf via an accretion disc. My thesis is a spectroscopic study of three of these objects: U Gem, GD 552 and GY Cnc. I present high-resolution optical spectra of U Gem taken during quiescent.
openaire
Variable Stars with the Kepler Space Telescope
, 2016 The Kepler space telescope has revolutionized our knowledge about exoplanets and stars and is continuing to do so in the K2 mission. The exquisite photometric precision, together with the long, uninterrupted observations opened up a new way to ...
Szabó, Róbert +2 more
core
Star spots and the period gap in cataclysmic variables
The Astrophysical Journal, 1994 M. Livio, J. E. Pringle
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, 1995 The study of cataclysmic variables - interacting binary stars containing a white dwarf accreting from an orbiting companion - is undergoing an exciting renaissance, as it embraces observations at all wavelengths. Cataclysmic variables allow, in particular, the direct and detailed study of equilibrium and non-equilibrium accretion discs; in turn these ...
Brian Warner
exaly +3 more sources
Dwarf Nova-Type Cataclysmic Variable Stars Are Significant Radio Emitters [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 We present 8–12 GHz radio light curves of five dwarf nova (DN) type cataclysmic variable stars (CVs) in outburst (RX And, U Gem, and Z Cam), or superoutburst (SU UMa and YZ Cnc), increasing the number of radio-detected DN by a factor of 2.
Deanne Coppejans +2 more
exaly +5 more sources
VY Sculptoris Stars as Magnetic Cataclysmic Variables [PDF]
Astronomy and Astrophysics, 2002 AbstractWe show that VY Scl stars must be magnetized in order to account for the absence of outbursts during their low and intermediate states. Absence of outbursts during low states requires only rather low magnetic moments but in systems in which the drops and rises of luminosity are slower than it takes for the accretion disc to adjust viscously to ...
Jean-Pierre Lasota-Hirszowicz +1 more
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Irradiation of the Secondary Star in Cataclysmic Variables [PDF]
Monthly Notices of the Royal Astronomical Society, 1992 It is shown how the relative strength of the Na I doublet over the surface of the secondary star can be calculated from radial velocity curves obtained using the Na I absorption feature around 8190 A. The results for 11 dwarf novae and one magnetic cataclysmic binary system are presented.
Robert Connon Smith
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On the Evidence for Brown Dwarf Secondary Stars in Cataclysmic Variables [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 6 pages, to appear in Monthly Notices ...
Stuart Littlefair +2 more
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