Symbiotic Binary YY Her — Eclipses, Flares and Outbursts

  • L. Hric
  • R. Gális
  • P. Niarchos
  • K. Gazeas


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.


Stars: Binaries: Symbiotic Stars: Individual: YY Her 


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  1. Hric, L., Petrík, K., Niarchos, P., Veliç, Z., Gális, R.: Inf. Bull. Variable Stars 5046, 1 (2001a)ADSGoogle Scholar
  2. Hric, L., Petrík, K., Veliç, Z., Gális, R.: Perseus 1, 4 (2001b)Google Scholar
  3. Huang, C.C.: Astron. Astrophys. 135, 410 (1984)ADSGoogle Scholar
  4. Mikolajewska, J., Kolotilov, E.A., Shugarov, S.Yu., Yudin, B.F.: Astron. Astrophys. 392, 197 (2002)CrossRefADSGoogle Scholar
  5. Munari, U., Kolotilov, E.A., Popova, A.A., Yudin, B.F.: Astron Zh. 74, 898 (1997a)Google Scholar
  6. Munari, U., Rejkuba, M., Hazen, M., Mattei, J., Schweitzer, E., Luthardt, R., Shugarov, S., Yudin, B.F., Popova, A.A., Chugainov, P.V., Sostero, G., Lepardo, A.: Astron. Astrophys. 323, 113 (1997b)ADSGoogle Scholar
  7. Tatarnikova, A.A., Esipov, V.F., Kolotilov, E.A., Mikolajewska, J., Munari, U., Shugarov, S. Yu.: Astron. Lett. 27(11), 703 (2001)CrossRefADSGoogle Scholar

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© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  1. 1.Astronomical Institute of the Slovak Academy of SciencesTatranská LomnicaSlovakia
  2. 2.Faculty of SciencesUniversity of P. J. ŠafárikKošiceSlovakia
  3. 3.Department of Astrophysics, Astronomy and MechanicsUniversity of AthensZografos, AthensGreece

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