RE1844 - 74: A new AM HER star from the ROSAT Wide Field Camera Survey

Details RE1844 - 74: A new AM HER star from the ROSAT Wide Field Camera Survey RE1844 - 74: A new AM HER star from the ROSAT Wide Field Camera Survey

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.265..545o&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 265, p. 545

Astronomy and Astrophysics

Astronomy

13

Sky Surveys (Astronomy), Cataclysmic Variables, Light Curve, Stellar Orbits, Ultraviolet Astronomy, Astronomical Photography, Astronomical Photometry, Astronomical Spectroscopy

Scientific paper

The ROSAT Wide Field Camera EUV source RE1844 - 74 has been identified with an approximately 16th-mag cataclysmic variable. Optical photometry shows that the system varies with an amplitude of more than 1 mag about the mean. The light curve is complex and shows substantial variations from one orbital cycle to the next. Optical spectroscopy confirms the 90-min orbital period suggested by the photometry, and shows large-amplitude (about 500 km/s) radial velocity variations. The strength and shape of the line profiles vary systematically with orbital phase. The above evidence suggests that RE1844 - 74 belongs to the AM Her subclass of cataclysmic variables.

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