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Title:
S193: another non-eclipsing SW Sex star
Authors:
Martínez-Pais, I. G.; Rodríguez-Gil, P.; Casares, J.
Affiliation:
AA(Instituto de Astrofísica de Canarias, C/ Via Lactea s/n, E 38200 La Laguna, Tenerife, Spain), AB(Instituto de Astrofísica de Canarias, C/ Via Lactea s/n, E 38200 La Laguna, Tenerife, Spain), AC(Instituto de Astrofísica de Canarias, C/ Via Lactea s/n, E 38200 La Laguna, Tenerife, Spain)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 305, Issue 3, pp. 661-670. (MNRAS Homepage)
Publication Date:
05/1999
Origin:
MNRAS
MNRAS Keywords:
ACCRETION, ACCRETION DISCS, BINARIES: CLOSE, BINARIES: SPECTROSCOPIC, STARS: INDIVIDUAL: S193, NOVAE, CATACLYSMIC VARIABLES
DOI:
10.1046/j.1365-8711.1999.02483.x
Bibliographic Code:
1999MNRAS.305..661M

Abstract

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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