Photometry and spectroscopy of V Sagittae through eclipse

Details Photometry and spectroscopy of V Sagittae through eclipse Photometry and spectroscopy of V Sagittae through eclipse

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.219..809w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 219, April 15, 1986, p. 809-814.

Astronomy and Astrophysics

Astronomy

30

Eclipsing Binary Stars, Stellar Spectrophotometry, Ubv Spectra, Cataclysmic Variables, Line Spectra, Stellar Models, Stellar Occultation, Stellar Rotation, Stellar Winds

Scientific paper

The authors present simultaneous spectroscopy and UBV photometry obtained for the binary system V Sagittae through several eclipses. The spectroscopy clearly reveals a rotational disturbance similar to those seen in eclipsing cataclysmic variables, but with a duration longer than can be explained as a disc occulted by a secondary star. An uneclipsed component to the line suggests a high-velocity wind is being expelled from the system. If the rotational disturbance represents disc material being occulted, its velocity implies that the primary must be a compact object, and not a main-sequence star or helium star. The difficulties in modelling this system are discussed.

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