INFLUENCE OF SHOCK WAVES ON THE LIGHT CURVES OF LONG-PERIOD VARIABLES

Автор(и)

  • L. S. Kudashkina Astronomical Observatory, Odessa State University T.G.Shevchenko Park, Odessa 270014, Ukraine, Ukraine
  • G. M. Rudnitskij Sternberg Astronomical Institute, Moscow State University 13 Universitetskij prospekt, Moscow 119899 Russia, Russian Federation

DOI:

https://doi.org/10.18524/1810-4215.1994.7.105754

Ключові слова:

Stars, Miras, light curves, stellar atmospheres, shock waves.

Анотація

The shapes of light curves of Mira-type variable stars is analyzed. It is shown that some features of the light curves may be explained by passage of shock waves in the stars' atmospheres. In particular, it is noted that "steps" of the ascending branches of the light curves have very similar durations (of the order of 0.1 stellar period) for a big number of miras. This time span is just approximately the time of propagation of shock waves through stars' atmospheres. The numerical simulation of shock wave propagation support the above suggestion and yield time scales that fit the observed light curve features.

Посилання

Andronov I.L.: 1994, Odessa Astron. Publ., 7, 49.

Kholopov P.N., Samus' N.N., Frolov M.S., Goransky V.P., Gorynya N.A., Karitskaya E.A., Kazarovets E.V., Kireeva N.N., Kukarkina N.P., Medvedeva G.I., Pastukhova E.N., Perova N.B., Shugarov S.Yu.: 1987, General Catalogue of Variable Stars (GCVS), 4th ed., Nauka, Moscow.

Klimishin I.A.: 1984, Shock Waves in Stellar Envelopes, Moscow: Nauka.

Mattei J.A.: 1978, AAVSO Rep,, 38.

Willson L.A.: 1976, Ap.J., 205, 172.

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Опубліковано

2017-07-01

Номер

Том 7 (1994)

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Відповідно Закону України про авторське право і суміжні права N 3792-XII від 23 грудня 1993 року