Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..330..455h&link_type=abstract
The Astrophysics of Cataclysmic Variables and Related Objects, Proceedings of ASP Conference Vol. 330. Edited by J.-M. Hameury a
Astronomy and Astrophysics
Astrophysics
Scientific paper
The indetermination of light curves behaviour of the symbiotic system YY Her stimulated us to call an international photometric campaign for a detailed coverage of its light curve. Our attention was oriented to cover the period of the expected secondary minimum that was discovered in 2001 tep{hr-hr2001}. The campaign was very successful; it covered the secondary as well as primary minimum affected by a flare in about JD 2,452,440 that was later followed by an energetic outburst (JD 2,452,700). One possibility to explain the periodic variations of the brightness of YY Her is the eclipsing model proposed by tet{hr-hr2003}. Some spectroscopic behaviour still remains inconsistent with this model. In the present work the energetic balances of the afore-mentioned events are calculated and a model with a deformed (non-homogeneous) envelope, surrounding the white dwarf is discussed.
Dobrotka Andrej
Galis Rudolf
Hric Ladislav
Simon Veronica
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