Odessa Astronomical Publications (Jul 2017)

FREQUENCY ANALYSIS OF TWO-YEARS OBSERVATIONS OF RR LYRAE

  • A. V. Yushchenko,
  • Yu. S. Romanov,
  • N. D. Lemeshchenko,
  • V. P. Murnikova

DOI
https://doi.org/10.18524/1810-4215.1994.7.105780
Journal volume & issue
Vol. 7, no. 1

Abstract

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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.