Other
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980cokon..76....1s&link_type=abstract
Communications of the Konkoly Observatory, No. 76 (Vol. VIII, 2), p. 1-134 (1980)
Other
26
Scientific paper
New UBV photoelectric observational data on 42 northern Cepheids with periods of 5-10 days are presented. The period changes and the variations in the light curve of the observed Cepheids are investigated. No secular light curve variation has been discovered. The O-C diagrams of CV Mon and RS Ori show a period jump and a subsequent rejump to the earlier value of the period. These two Cepheids as well as the shorter period ones with a rejumping period are probably members of binary systems. Another effect can be pointed out in AW Per and DD Cas which are also members of binary systems: the apparent period changes due to the orbital motion around the common centre of gravity can be seen. Both the orbital period and the value of a x sin i can be determined for these latter two stars. The combined effect (i.e.. the effect of the orbital motion and the rejumping period) can be seen in the O-C diagram of the short period Cepheid SU Cygni.
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