Spectroscopy of faint, high latitude cataclysmic variable candidates.

Details Spectroscopy of faint, high latitude cataclysmic variable candidates. Spectroscopy of faint, high latitude cataclysmic variable candidates.

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.245..385m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. Vol. 245, No. 3, p. 385 - 391

Astronomy and Astrophysics

Astronomy

48

Cataclysmic Binaries: Spectra, Cataclysmic Binaries: Outbursts, Cataclysmic Binaries: Eclipsing Binaries, Cataclysmic Binaries: Polars

Scientific paper

The fields of several variable stars believed to be cataclysmic binaries at large distances above the Galactic plane have been examined using low resolution spectroscopy in the 3600-10000 Å wavelength range. The spectral characteristics of the stars observed are presented. The authors find that AL Com may be an intermediate polar on the basis of its modulation period, and the observation of hydrogen lines in its spectrum. In four systems, AR Cnc, DV UMa, DO Dra and BC UMa, there is evidence for the spectral signature of the mass-donating secondary, and the authors use the spectral type of the secondary to estimate the system parameters. At least two of these binaries, AR Cnc and DV UMa, are eclipsing. The inferred absolute magnitude of BC UMa is faint, in the range 11.0-13.5. The blue spectrum of this star is remarkably similar to that of the unusual cataclysmic variable WZ Sge. The authors note that BC UMa and WZ Sge also exhibit similar, and extreme, outburst amplitudes, and have very similar orbital periods.

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