A short review is given of the observations collected in recent years on the infrared emission of active binaries belonging to the RS CVn class. When compared to photometric light curves in optical filters (UBVRI) these data show that about 40 percent of the sources studied so far exhibit a clear infrared excess. The presence of thin circumstellar shells seems to be the most promising way of explaining the observations. Possible interpretations of this excess emission based on the evolutionary status of the binary components are discussed.

On the origin of circumstellar shells around RS CVn-type binaries

BUSSO, Maurizio Maria;
1990

Abstract

A short review is given of the observations collected in recent years on the infrared emission of active binaries belonging to the RS CVn class. When compared to photometric light curves in optical filters (UBVRI) these data show that about 40 percent of the sources studied so far exhibit a clear infrared excess. The presence of thin circumstellar shells seems to be the most promising way of explaining the observations. Possible interpretations of this excess emission based on the evolutionary status of the binary components are discussed.
1990
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11391/1064065
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