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A search for evolutionary period changes in small-amplitude Cepheids

Л. Н. БердниковV. V. IgnatovaUlugbek Astronomical Institute , Astronomicheskaya ul. 33, Tashkent, 700052, UzbekistanΕ. N. PastukhovaInstitute of Astronomy, Russian Academy of Sciences , Pyatnitskaya ul. 48, Moscow, 109017, Russia

Astronomical and Astrophysical Transactionsjournal1998en

ABI

Annotatsiya

Abstract Moments of maximum brightness were determined using Hertzsprung's method for 39 stars attributed in the GCVS–IV (Kholopov et al., 1985–1987) to small-amplitude DCEPS Cepheids. An analysis of O—C diagrams enabled us to conclude that the periods of SZ Cas, V Oph, EU Tau and α UMi (and possibly of SU Cas, V1726 Cyg, V473 Lyr and UV Mon) show evolutionary changes.

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Mavzular

Stellar, planetary, and galactic studies Astro and Planetary Science Astronomy and Astrophysical Research

Identifikatorlar

DOI: 10.1080/10556799808201753

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