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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

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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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