A 4.86-h periodic modulation in the UV resonance lines of the cataclysmic variable V795 Herculis

Details A 4.86-h periodic modulation in the UV resonance lines of the cataclysmic variable V795 Herculis A 4.86-h periodic modulation in the UV resonance lines of the cataclysmic variable V795 Herculis

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.262l..37p&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 262, no. 3, p. L37-L42.

Astronomy and Astrophysics

Astronomy

13

Cataclysmic Variables, Resonance Lines, Ultraviolet Spectra, Astronomical Spectroscopy, Iue, Rosat Mission, X Ray Spectra

Scientific paper

Low-resolution IUE spectroscopy of V795 Her secured in 1992 August is used to authenticate the presence of an approximately 4.86-h periodic variation in the mainly wind-formed Si IV 1400-A and C IV 1549-A resonance lines. The modulation is demonstrated to be coherent across a 3-yr time-span, and is discordant with the mooted orbital (optical spectroscopic) period of about 2.60 h. Constraints are discussed for some possible configurations of the system that introduce asymmetries and can potentially yield modulated profile variability. The first ROSAT X-ray detection of V795 Her is also described.

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