FREQUENCY ANALYSIS OF PHOTOGRAPHIC OBSERVATIONS OF PULSATING STARS

V. P. Bezdenezhnyi

Анотація


The Fourier analysis are performed for photoelectric and photographic B-observations (Goranskij and Shugarov, 1979) of RR Lyrae star RW Ari. Besides the main frequency f0 and four its first harmonics two more frequencies are found: f1 =f0 /3 and f2 =0.711f0 c/d. It permits to identify frequencies: f0 as fs, introduced by us earlier (Bezdenezhnyi, 1997b) for RR Lyrae star T Sex, and f2 - as f1H. Such analysis of photographic author's observations of RR Lyrae star BK Dra is performed too. It is shown that BK Dra is a multiperiodic variable star. Its frequencies identifications are carried out and given. Three data sets of Cepheid V477 Oph: visual author's (Bezdenezhnyi and Mandel, 1977), photographic Mandel's (1970) observations and (O-C) - residuals (Hacke, 1988) show that V477 Oph apparently can be referred to bimodal Cepheids.

Ключові слова


Stars; RR Lyrae; individual; RW Ari; BK Dra; Cepheids; individual; V477 Oph; Fourier analysis; mode identifications

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Посилання


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Bezdenezhnyi V.P.: 1997a, Odessa Astron. Publ, 10, 89.

Bezdenezhnyi V.P.: 1997b, Odessa Astron. PubL, 10, 95.

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Breger M.: 1991, Delta Scuti Star Newsletter, Issue 3, 21.

Detre L.: 1937, AN, 262, 81.

Goranskij V.P., Shugarov S.Yu.: 1979, Variable Stars, 21, 211.

Hacke G.: 1988, Sonn. Mitt, 340, 146.

Kholopov P.N. et al.: 1985, General Catalogue of Variable Stars, v.l, Nauka, Moscow.

Mandel O.E.: 1970, Variable Stars, 17, No. 4 (130), 347.

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DOI: https://doi.org/10.18524/1810-4215.2001.14.99147

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