FREQUENCY ANALYSIS OF TWO-YEARS OBSERVATIONS OF RR LYRAE

Автор(и)

  • A. V. Yushchenko Astronomical Observatory, Odessa State University, T.G.Shevchenko Park, Odessa 270014, Ukraine, Ukraine
  • Yu. S. Romanov Astronomical Observatory, Odessa State University, T.G.Shevchenko Park, Odessa 270014, Ukraine, Ukraine
  • N. D. Lemeshchenko Astronomical Observatory, Odessa State University, T.G.Shevchenko Park, Odessa 270014, Ukraine, Ukraine
  • V. P. Murnikova Astronomical Observatory, Odessa State University, T.G.Shevchenko Park, Odessa 270014, Ukraine, Ukraine

DOI:

https://doi.org/10.18524/1810-4215.1994.7.105780

Ключові слова:

Stars, individual - Stars, pulsation - Stars, RR Lyrae

Анотація

2964 photoelectric observation of RR Lyrae were obtained at the Odessa observatory during two years: 1977 and 1978. Observations were transformed to standard BV photometric system and frequency-analyzed in the interval 0.08-700 days. A number of harmonics were detected. The main harmonic coincides with the well known photometric period (v0=1.764129), second harmonic ( vb=1.789093) is related with a period of Blazhko effect. There is a sequence of harmonics, which can be written by equation v=kv0 + vb where k=0,1,2,3,4. Two harmonics are connected with known periods of RR Lyrae: 123 days and four years.

Посилання

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Preston G.W., Smak J., Paczynsky B.: 1965, Ap. J. Suppl, 12, 99.

Walraven T.: 1949, . Bulletin of the Astronomical Institute of the Netherlands, XI, 403, 1.

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Опубліковано

2017-07-01

Номер

Том 7 (1994)

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