X-ray observations of selected cataclysmic variable stars using the Einstein Observatory

Abstract

view Abstract Citations (113) References (46) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS X-ray observations of selected cataclysimic variable stars using the Einstein Observatory. Cordova, F. A. ; Mason, K. O. ; Nelson, J. E. Abstract X-ray observations of 12 cataclysmic variable stars using the Einstein Observatory are reported. Nine of these stars, representing all subclasses of cataclysmic variables, were detected. Their fluxes range from 2 x 10 to the -13th to 1 x 10 to the -11th ergs/sq cm-s in the energy interval 0.16-4.5 keV. The spectra of all the sources detected are relatively hard (kT not less than 5 keV). There is no evidence for an ultrasoft emission component (kT of about 50 eV) such as has been observed from the dwarf novae SS Cyg and U Gem during optical outburst. The X-ray and optical fluxes of the objects observed can be understood in terms of differences in mass accretion rate if the accreting stars in these close binary systems possess a weak magnetic field. Publication: The Astrophysical Journal Pub Date: April 1981 DOI: 10.1086/158836 Bibcode: 1981ApJ...245..609C Keywords: Binary Stars; Dwarf Stars; Novae; Stellar Radiation; Variable Stars; X Ray Sources; Emission Spectra; Heao 2; Spaceborne Astronomy; Stellar Magnetic Fields; Stellar Mass Accretion; Stellar Spectra; Astronomy full text sources ADS | data products SIMBAD (17)