On the nature of H alpha outbursts in the RS Canum Venaticorum binary SZ PISCIUM

Details On the nature of H alpha outbursts in the RS Canum Venaticorum binary SZ PISCIUM On the nature of H alpha outbursts in the RS Canum Venaticorum binary SZ PISCIUM

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pasp...93..732r&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 93, Dec. 1981, p. 732-734.

Astronomy and Astrophysics

Astronomy

5

Binary Stars, Emission Spectra, H Alpha Line, Roche Limit, Stellar Spectra, Light Curve, Mass Transfer, Radial Velocity, Stellar Mass Ejection, Stellar Models

Scientific paper

An H-alpha emission episode on the RS CVn binary SZ Psc was observed in 1979. These observations are compared with a recently reported 1978 outburst, and both data are discussed and interpreted in terms of the surface phenomena or star-spot model. Bopp (1981) had attributed the 1978 H-alpha outburst as due to a mass-transfer or mass-loss event caused by the cooler primary expanding on a short-time scale and overfilling its Roche lobe. This interpretation appeared to be inconsistent with the surface phenomena model. Evidence is presented which supports the bizarre behavior of the H-alpha emission line as being due to the existence of a disk fed by flare-like eruptions. Bopp's 1978 observations can also be explained in terms of such a model, only more material would be involved in that event, since its H-alpha emission is about twice as strong.

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