2A0526-328, an optical and X-ray study of a cataclysmic variable

Details 2A0526-328, an optical and X-ray study of a cataclysmic variable 2A0526-328, an optical and X-ray study of a cataclysmic variable

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.200.1039w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 200, Sept. 1982, p. 1039-1051.

Astronomy and Astrophysics

Astronomy

6

Light (Visible Radiation), Radial Velocity, Radiant Flux Density, Stellar Spectrophotometry, Variable Stars, X Ray Spectra, Emission Spectra, Light Curve, Line Spectra, Periodic Variations, Stellar Evolution, Stellar Magnetic Fields, Stellar Mass Accretion, Stellar Models, Stellar Spectra, X Ray Astronomy

Scientific paper

Spectroscopic observations of the cataclysmic variable 2A0526-328 confirm that the emission line radial velocity period (5.48 hr) is significantly different from the photometric period (5.19 hr). Changes in the emission line velocity and profiles suggest that the accretion process is controlled by the white dwarf's magnetic field. Einstein X-ray observations show it is a hard source with a thermal spectrum of about 19 keV. There is no evidence of any strong, soft X-ray component present as in the majority of X-ray-emitting cataclysmic variables. Quasi-periodic variations on a time-scale of about 700s are observed in the X-ray light curve. Similar fluctuations have been reported in the optical emissions. A model for the object is proposed in which a rotating white dwarf revolves with a 4-day period in a retrograde orbit with a subluminous red giant.

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