Abstract
The problem of the flare taking place on opposite sides of a star is considered. Such a screened flare, diffused through the star's atmosphere (chromosphere), may also be registered. The theoretical light curve for diffused flare event is derived, which differs strongly from the usual flare light curves. The light curve of diffused flare is characterized first of all by its very slow rise of brightness. This result opens quite a new direction to understand the nature of the so-called ‘slow’ flares, observed often among the UV Cet-type stars as well as flare stars in aggregates. All slow flares can be interpreted as quite ordinary flares of quite ordinary flare stars — taking place, however, on the opposite sides of the star. The results of interpretation of some slow flare events of YY Gem and three flare stars in Orion are presented. An attempt is made for the determination of actual amplitudes of screened flares taking place on the opposite sides of a star.
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References
Gurzadyan, G. A.: 1980,Flare Stars, Pergamon Press, London.
Gurzadyan, G. A.: 1984,Stellar Chromospheres, Moscow, Nauka (in Russian).
Gurzadyan, G. A.: 1985,Stellar Flares — Their Physics and Cosmogony, Moscow, Nauka (in Russian).
Haro, G.: 1968, inStars and Stellar Systems. Vol. VII, p. 141.
Haro, G.: 1976,Bol. Inst. Tonantzintla,2, 3.
Haro, G. and Terrazas, L.: 1954,Bol. Obst. Tonantzintla 10, 3.
Moffett, T. J.: 1974,Astrophys. J. Suppl. 29, 1.
Moffett, T. J., and Bopp, B. W.: 1976,Astrophys. J., Suppl. 31 61.
Parsamyan, E. S.: 1980,Astrofizika 16, 87.
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Gurzadyan, G.A. Flares on opposite sides of the star: Observational aspects. Astrophys Space Sci 125, 127–147 (1986). https://doi.org/10.1007/BF00643978
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DOI: https://doi.org/10.1007/BF00643978