Abstract
Secular period changes of one hundred northern Cepheids are investigated with the help of O−C diagrams. With the classical Cepheids the rate of observed period changes is in good agreement with that determined from stellar evolution theory. The period noise cannot mask the evolutionary period changes especially in longer period Cepheids for which the occurrence of parabolic O−C graphs is unusually frequent.
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References
Fernie, J. D.: 1979,Astrophys. J. 231, 841.
Hofmeister, E.: 1967,Z. Astrophys. 65, 194.
Kukarkin B. V. and Florya, N. F.: 1932.,Z. Astrophys. 4, 247.
Kukarkin, B. V., Kholopov, P. N., Efremov, Yu. N., Kukarkina, N. P., Kurochkin, N. E., Medvedeva, G. I., Perova, N. B., Fedorovich, V. P., and Froloy, M. S.: 1969–1970,General Catalogue of Variable Stars, 3rd Ed., Sternberg Astronomical Institute, Moscow.
Kukarkin, B. V., Kholopov, P. N., Efremov, Yu. N., Kukarkina, N. P., Kurochkin, N. E., Medvedeva, G. I., Perova, N. B., Pskovsky, Yu. P., Fedorovich, V. P., and Frolov, M. S.: 1971,1st Suppl. to the 3rd Ed. of G.C.V.S., Sternberg Astronomical Institute, Moscow.
Kukarkin, B. V., Kholopov P. N., Efremov, Yu. N., Kukarkina, N. P., Kurochkin, N. E., Medvedeva G. I., Perova, N. B., Pskovsky, Yu. P., Fedorovich, V. P., and Frolov, M. S.: 1974,2nd Suppl. to the 3rd Ed. of G.C.V.S., Sternberg Astronomical Institute, Moscow.
Kwee, K. K.: 1967,Bull. Astron. Inst. Neth., Suppl. 2, 97.
Makarenko, E. N.: 1968,Perem. Zvezdy 16, 388.
Parenago, P. P.: 1956,Perem. Zvezdy 11, 236.
Petit, M.: 1978,Inf. Bull. Var. Stars. No. 1402.
Sweigart, A. V. and Renzini, A. 1979,Astron. Astrophys. 71, 66.
Szabados, L.: 1977,Mitt. Sternw. ung Akad. Wiss., Budapest, No. 70 (Paper I).
Szabados, L.: 1980,Mitt. Sternw. ung. Akad. Wiss., Budapest, No. 76 (Paper II).
Szabados, L.: 1981,Commun. Konkoly Obs. Hung. Acad. Sci., Budapest, No. 77 (Paper III).
Szeidl, B.: 1975, in W. Sherwood and L. Plaut (eds.), ‘Variable Stars and Stellar Evolution’,IAU Symp. 67, 545.
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Szabados, L. Period changes of Cepheid variables. Astrophys Space Sci 96, 185–194 (1983). https://doi.org/10.1007/BF00661952
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DOI: https://doi.org/10.1007/BF00661952