CAOSP abstracts, Volume: 36, No.: 1, year: 2006

Author(s): Hric, L.; Gális, R.; Niarchos, P.; Dobrotka, A.; Šimon, V.; Šmelcer, L.; Velič, Z.; Hájek, P.; Gazeas, K.; Sobotka, P.; Koss, K.
Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 36, no. 1, p. 26-46.
Date: 02/2006
Title: The photometric study of the symbiotic binary YY Her. I. The eclipsing model
Keyword(s): stars: binaries: symbiotic, stars: individual: YY Her
Pages: 26 -- 46

Abstract: The extensive long-term CCD and photoelectric photometric observations of the classical symbiotic star YY Her covering the period of its post-outburst activity (JD 2 451 823 -- 2 452 996) are presented. We explain the periodic variations of the brightness of YY Her by the eclipses of the components in the symbiotic system. The model with a deformed (non-homogeneous) envelope, surrounding the white dwarf is discussed. In addition, we observed a flare in about JD 2 452 440, during the primary minimum, that was later followed by an energetic outburst in JD 2 452 700.

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