UBVRI POLARIMETRY OF CLOSE BINARY SYSTEM V448 Cyg

Автор(и)

  • N. M. Shakhovskoy Department of Astronomy and Astronomical Observatory, Odessa National University, Odessa 65014 Ukraine, Ukraine
  • G. V. Volkova Astronomical Observatory, Odessa State University, T.G.Shevchenko Park, Odessa 270014 Ukraine, Ukraine
  • Yu. L. Manilov Astronomical Observatory, Odessa State University, T.G.Shevchenko Park, Odessa 270014 Ukraine, Ukraine
  • N. H. Minikulov Crimean Astrophysical Observatory, Nauchny 334413 Crimea, Ukraine, Ukraine

DOI:

https://doi.org/10.18524/1810-4215.1994.7.98779

Ключові слова:

Stars, binaries, close, eclipsing, circumstellar matter, polarization.

Анотація

ABSTRACT. Analysis of the polarimetric measurements of the eclipsing binary system V448 Cyg in wide UBVRI niters has shown the presence of the following components of the polarization: a) interstellar; b) constant intrinsic polarization with a flat spectrum; c) phase-dependent contribution, the amplitude of which decreases with wavelength. Constant component is possibly caused by an extended disk-like optically thin refracting envelope; the variable one may be caused by relatively dense condensations near the Lagrangian points in a binary. By analyzing the Fourier harmonics, the inclination angle is found to be i = 82°. The orbital plane of the system is inclined in respect to the Galaxy plane at an angle 70°. Mass of the extended envelope is estimated to be 1.5 x 10-8 M☉ with a mass loss rate 8.6 x 10-7 M☉/yr. Key words: Stars: binaries: close, eclipsing; circumstellar matter; polarization.

Посилання

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Опубліковано

2017-08-11

Номер

Том 7 (1994)

Розділ

Статті

Ліцензія

Авторське право (c) 2017 Odessa Astronomical Publications

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