Symbiotic Binary YY Her – Eclipses, Flares and Outbursts |
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| Authors: | L. Hric R. Gális P. Niarchos K. Gazeas |
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| Affiliation: | (1) Astronomical Institute of the Slovak Academy of Sciences, 059 60 Tatranská Lomnica, Slovakia;(2) Faculty of Sciences, University of P. J. Šafárik, Moyzesova 16, 041 54 Košice, Slovakia;(3) Department of Astrophysics, Astronomy and Mechanics, University of Athens, GR 157 84 Zografos, Athens, Greece |
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| Abstract: | The long-term CCD and photoelectric observations of 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 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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| Keywords: | Stars: Binaries: Symbiotic Stars: Individual: YY Her |
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