Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.264..619s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. 264, NO. 3/OCT1, P. 619, 1993
Astronomy and Astrophysics
Astronomy
6
Accretion, Accretion Discs - Binaries: Eclipsing - Binaries: Spectroscopic - Stars: Individual: V1315 Aql - Novae, Cataclysmic Variables
Scientific paper
V1315 Aquilae is an eclipsing cataclysmic binary with a period of 3.35 h. Its far-red spectrum is dominated by a strong absorption feature, which is identified as the O I triplet near 7773 Å. Time-resolved spectroscopic data have been used to study the radial velocity variations of this absorption feature. A comparison star was observed simultaneously and used to provide approximate spectrophotometry. The velocity variations are about one-fifth of a period out of phase with the mean motion of the disc, and have a semi-amplitude of 72 km s-1. Light curves for the continuum near the O I feature and for the absorption line itself show that the continuum is eclipsed but that the absorption-line strength shows a more nearly sinusoidal variation, with maximum absorption near phase 0.5. Although we are unable to propose a detailed model, the results clearly indicate a non-axisymmetric distribution of absorbing material in the system.
Catalan Maria S.
Fiddik R. J.
Hawkins Nathan A.
Smith Christopher R.
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