The authors present a complete list of IRAS observations of RS CVn-type binaries, according to the revised version of the IRAS Point Source Catalog. Selected samples of the data are compared to the colour sequences for normal stars compiled by Cohen et al. (1987) and to the flux ratios expected from black bodies. In both cases, some (but not all) of the sources show evidence of an IR excess, pointing out that RS CVn variables do not behave in a unique way at IR wavelengths. Since the excess, when present, is not correlated with the activity level nor with the evolutionary status, it is concluded that its origin still calls for a clear explanation, perhaps in terms of mass-loss phenomena near the Main Sequence.
IRAS observations and IR excesses of RS CVn-type binaries
BUSSO, Maurizio Maria;
1988
Abstract
The authors present a complete list of IRAS observations of RS CVn-type binaries, according to the revised version of the IRAS Point Source Catalog. Selected samples of the data are compared to the colour sequences for normal stars compiled by Cohen et al. (1987) and to the flux ratios expected from black bodies. In both cases, some (but not all) of the sources show evidence of an IR excess, pointing out that RS CVn variables do not behave in a unique way at IR wavelengths. Since the excess, when present, is not correlated with the activity level nor with the evolutionary status, it is concluded that its origin still calls for a clear explanation, perhaps in terms of mass-loss phenomena near the Main Sequence.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
