S193: another non-eclipsing SW Sex star

Details S193: another non-eclipsing SW Sex star S193: another non-eclipsing SW Sex star

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.305..661m&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 305, Issue 3, pp. 661-670.

Astronomy and Astrophysics

Astronomy

15

Accretion, Accretion Discs, Binaries: Close, Binaries: Spectroscopic, Stars: Individual: S193, Novae, Cataclysmic Variables

Scientific paper

We present time-resolved optical spectroscopy of the cataclysmic variable S193. The emission lines are remarkably similar to those of V795 Her and exhibit high-velocity S-waves and complex absorptions that are modulated with the orbital period. Evidence for transient anomalous spectral features is seen during the first two nights of our run. We propose that S193 and V795 Her are non-eclipsing SW Sex stars. Finally, we show that the `disc overflow' model fails to explain the Balmer line orbital behaviour in these low-inclination systems.

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