DOI: https://doi.org/10.18524/1810-4215.2005.18.98250

ON THE NATURE OF ASYMMETRY OF THE LIGHT CURVES OF BM Cas - A LONG PERIOD ECLIPSING SUPERGIANT BINARY

P. Kalv, V. Harvig, T. Aas, I. Pustylnik

Анотація


We report results of the analysis of UBVR light curves of the long period eclipsing binary BM Cas obtained between 1967 and 1996 in Tallinn observatory. The asymmetry of the light curves and color variations are discussed and interpreted in terms of a hot extended region close to the neck connecting the critical Roche lobes of the components.

Ключові слова


stars;binaries;close - stars; individual; BM Cas

Повний текст:

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Посилання


Barwig H.D.: 1976, Spektroskopische Untersuchung des Bedeckungsveranderlichen BM Cassiopeiae. Inaugural- Dissertation zur Erlangung des Doktorgrades des Fachbereiches Physik der Ludwig-Maximilians-Univ. Munchen.

Fernie J.D., Evans N.R.: 1997, The supergiant Binary BM Cas, PASP vol. 109, 541-548.

Kalv P., Harvig V., Pustylnik LB.: 2005, BM Cas a long period eclipsing binary with a supergiant and common envelope, In: Zdenek Kopal binary star legacy, //eds. H.Drechsel and M.Zejda, Aph. and Space Sci., vol. 296, Nos 1-4, 457-460.

Shao C.Y., Gaposhkin S.: 1962, Supergiant Eclipsing Binary BM Cas, Astron. J. vol.67, 283.

Meyer F., Meyer-Hofmeister E.: 1983, A model for the standstill of the Z Camelopardalis variables, A&A, vol. 121, 29-34.




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