High-speed photometry and spectroscopy of the dwarf nova TY Piscis Austrini

Details High-speed photometry and spectroscopy of the dwarf nova TY Piscis Austrini High-speed photometry and spectroscopy of the dwarf nova TY Piscis Austrini

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238...73w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, May 1, 1989, p. 73-96.

Astronomy and Astrophysics

Astronomy

39

Dwarf Novae, Light Curve, Stellar Spectrophotometry, Absorption Spectra, Emission Spectra, High Speed

Scientific paper

High-speed photometry of TY PsA was obtained during quiescence, in a normal outburst, and in a superoutburst. Simultaneous spectroscopy was also obtained for four nights of the superoutburst. The photometry is used to derive an orbital period of 0.08400 + or - 0.00006 day and a superhump period of 0.08765 day. It is found that the observed spectroscopic properties may be explained if TY PsA develops a nonaxially symmetric accretion disk during superoutbursts. It is suggested that cool gas lying above the accretion disk of TY PsA is occasionally projected against the bright center of the disk. The results are similar to those of observations in the soft X-rays from SS Cyg by Cordova et al. (1983).

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