We summarize the methods now available to detect the presence of companions to Cepheids, and then we analyze the results of the application of the recent photometric method proposed by Fernie (1980). If applied to the set of VBLUV observations of southern Cepheids carried out by Pel (1976), this method gives a frequency of about 25°/oJ which is consistent with the more recent spectroscopic determinations (Gieren, 1981). The importance of the IUE satellite to directly observe the U flux emitted by the B-companion is emphasized.
THE FREQUENCY OF CEPHEID BINARIES / Russo, Guido. - (1982), pp. 23-26. ( Binary and Multiple Stars as Tracers of Stellar Evolution).
THE FREQUENCY OF CEPHEID BINARIES
Guido Russo
Writing – Original Draft Preparation
1982
Abstract
We summarize the methods now available to detect the presence of companions to Cepheids, and then we analyze the results of the application of the recent photometric method proposed by Fernie (1980). If applied to the set of VBLUV observations of southern Cepheids carried out by Pel (1976), this method gives a frequency of about 25°/oJ which is consistent with the more recent spectroscopic determinations (Gieren, 1981). The importance of the IUE satellite to directly observe the U flux emitted by the B-companion is emphasized.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
