Phase-resolved Hubble Space Telescope ultraviolet spectroscopy of V795 HER

Details Phase-resolved Hubble Space Telescope ultraviolet spectroscopy of V795 HER Phase-resolved Hubble Space Telescope ultraviolet spectroscopy of V795 HER

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.299..305r&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 299, Issue 2, pp. 305-318.

Astronomy and Astrophysics

Astronomy

8

Accretion, Accretion Discs, Binaries: Close, Stars: Individual: V795 Her, Novae, Cataclysmic Variables, Ultraviolet: Stars

Scientific paper

We present highly time-resolved HST FOS UV spectroscopy of the nova-like binary V795 Her. Several key results emerge. For the first time we find a strong 2.6-h signature in the variability of the UV lines. The HST data reveal no evidence of a 4.8-h `period', in contrast to our previous IUE observations. This, and differences in the spectral line characteristics, suggests that HST found the system in a different state from earlier IUE observations. The CIV line alone contains a fairly stable, asymmetric, extended blueward absorption trough which we associate with a wind outflow. The 2.6-h variations of the line profiles are largely confined to an interval of about 0.4 in phase and to the velocity regime -1500

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