VARIATIONS OF THE β CEPHEI Hα LINE PARAMETERS IN 1993 - 1998.

Автор(и)

  • E. A. Panko Kalinenkov astronomical observatory, Nikolaev State Pedagogical University, Nikolskaja, 24, Nikolaev, 327030, Ukraine, Україна
  • A. E. Tarasov Crimean Astrophysical Observatory, Nauchny, Crimea, 334413, Ukraine, Україна

DOI:

https://doi.org/10.18524/1810-4215.1999.12.93111

Ключові слова:

Line, profiles - stars, emission line, Be-stars, individual, &#946, Cephei

Анотація

We use high-dispersion CCD spectrograms obtained in 1993 - 1998 to study parameter variations of the absorption and emission components Hα line of the star β Cephei. We show that radial velocity of the emission component does not depend on star pulsation and systematically differs from the star radial velocity. The star radial velocity measured on doublet CII lines and corrected for pulsation decreases quickly than ensues from orbital moving ephemeris. We suppose the envelope appears around the closer β Cep companion, and the changes of the radial velocity of the emission components Hα partially reflects the orbital moving of the closer companion. It is possible, the system periastron passage will come earlier than ensues from the present significance of the orbital period.

Посилання

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Опубліковано

2017-03-16

Номер

Том 12 (1999)

Розділ

Статті

Ліцензія

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