Period Changes in Dwarf Cepheids, III SZ Lyncis

Details Period Changes in Dwarf Cepheids, III SZ Lyncis Period Changes in Dwarf Cepheids, III SZ Lyncis

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983cokon..84..251s&link_type=abstract

Commumications of the Konkoly Observatory, No. 84 (Vol. IX, 5), p. 251-290 (1983)

Computer Science

5

Scientific paper

2371 photoelectric UBV observations obtained between 1962 and 1979 and twelve radial velocity measurements made in 1971 are reported. The long-periodic variation in time of maximum light discovered by van Genderen has been confirmed and the values of its period (P1= 1170 days = 3.20 yr) and semiamplitude (A = 0.00540 day = 467 sec) were improved. A secular change in the pulsation period (B = 10-12 day x cycle-1) has been found Small cycle-to- cycle variations are clearly seen but a search for periodic modulation failed. The photometric parameters of the light curves are discussed. The two-colour diagram of SZ Lyn suggests an interstellar reddening of E(B-V) = 0.04 magn. Our spectra do not show any feature of the presence of doubled lines. Our observations are compatible with the hypothesis that SZ Lyn is a single-lined spectroscopic binary with a period of 3.20 yr and a total velocity amplitude 18 km x s-1.

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