Negative superhumps and red noise in the cataclysmic binary TT Arietis: the international campaign "TT Ari-94"

Автор(и)

  • I. L Andronov Department of Astronomy, Odessa State University, Ukraine
  • K. Arai Kuki-Hokuyo Senior High School, Japan
  • L. L. Chinarova Department of Astronomy, Odessa State University, Ukraine
  • N. I. Dorokhov Department of Astronomy, Odessa State University, Ukraine
  • T. N. Dorokhova Department of Astronomy, Odessa State University, Ukraine
  • A. Dumitrescu Astronomical Institute of the Romanian Academy of Sciences, Romania
  • D. Nogami Department of Astronomy, Faculty ОГ Science, Kyoto University, Japan
  • S. V. Kolesnikov Department of Astronomy, Odessa State University, Ukraine
  • A. Lepardo Stazione Astronomica Remanzacco, Italy
  • P. A. Mason New Mexico State University, Department of Astronomy, Mexico
  • K. Matsumoto Osaka Kyoiku University, Japan
  • G. Oprescu Astronomical Institute of the Romanian Academy of Sciences, Romania
  • G. Pajdosz MtSuhora Observatory, Pedagogical University, Poland
  • R. Passuelo Stazione Astronomica Remanzacco, Italy
  • L. Patkos Konkoly Observatory, Hungary
  • D. S. Senio Department ОГ Astronomy, Kazan State University, Russian Federation
  • G. Sostero Stazione Astronomica Remanzacco, Italy
  • V. F. Suleimanov Department ОГ Astronomy, Kazan State University, Russian Federation
  • J. Tremko Astronomical Institute of the Slovak Academy of Sciences, Slovakia
  • G. V. Zhukov Department ОГ Astronomy, Kazan State University, Russian Federation
  • S. Zola Astronomical Observatory, Jagiellonian University, Poland

DOI:

https://doi.org/10.18524/1810-4215.1997.10.98743

Ключові слова:

Stars, binary, novalike, superhumps, red noise, Individual, ТТ Ari

Анотація

Results obtained during the international observational campaign ” Т Т Ari-94” are briefly discussed. During 258 hours, totally 51299 observations were obtained in 12 observatories. The moments of 68 individual maxima and 74 minima are tabulated. The linear ephemeris for the maximum is MachJD : 2449645.4255:і:0510003+(051133160і051000004) -Е for our data obtained in JD 2449 614-690. The period value is distinctly outside the interval 0511326 – 05113298 obtained for previous years. It still corresponds to the ’negative superhump’ state, whereas for a normal ’positive superhump’ the value predieted by Tremko et al. (1996, As.Ap. 312, 121) is P : 0.011426 105100006. The data prewhitened in respect to the superhump variations show the red noise power-law power spectrum with an index ”у : 1.3...2.6.

Посилання

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Опубліковано

2017-04-12

Номер

Том 10 (1997)

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