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New Clues on the Model of YY Her After Two Seasons

Published online by Cambridge University Press:  22 February 2018

L. Hric ,
R. Gális ,
A. Dobrotka ,
V. Śimon ,
K. Petrík ,
P. Niarchos ,
Z. Velić ,
K. Gazeas ,
L. Šmelcer  and
P. Hájek
...Show all authors
L. Hric
Affiliation:
Astronomical Institute of the Slovak Academy of Sciences, 059 60 Tatranská Lomnica, Slovakia (hric@ta3.sk)
R. Gális
Affiliation:
Faculty of Sciences, University of P. J. Šafárik, 041 54 Košice, Slovakia (galis@kosice.upjs.sk)
A. Dobrotka
Affiliation:
Faculty of Materials Science and Technology STU, 917 24 Trnava, Slovakia (dobrotka@mtf.stuba.sk)
V. Śimon
Affiliation:
Astronomical Institute, 251 65 Ondejov, Czech Republic
K. Petrík
Affiliation:
Faculty of Education, 918 43 Trnava University, Slovakia
P. Niarchos
Affiliation:
Faculty of Physics, University of Athens, Grecce
Z. Velić
Affiliation:
Observatory, 018 61 Beluša, Slovakia
K. Gazeas
Affiliation:
Faculty of Physics, University of Athens, Grecce
L. Šmelcer
Affiliation:
Observatory, 757 01 Valašské Meziříčí, Czech Republic
P. Hájek
Affiliation:
Observatory, 682 01 Vyškov, Czech Republic
P. Sobotka
Affiliation:
MEDUZA Group, 616 01 Brno, Czech Republic
K. Koss
Affiliation:
Observatory, 682 01 Vyškov, Czech Republic
L. Brát
Affiliation:
MEDUZA Group, 616 01 Brno, Czech Republic
F. Lomoz
Affiliation:
MEDUZA Group, 616 01 Brno, Czech Republic

Extract

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During two observational seasons of international campaign of YY Her we secured photometric data which covered the primary as well as the secondary minima and revealed unexpected outburst activity of this system.

YY Her belongs to the classical symbiotic binaries with nova-like outbursts. Recently Mikolajewska et al. (2002) explained the light variability of YY Her by combining the ellipsoidal changes and sinusoidal variations of the nebular continuum and line emission. In 2001 (Hric et al. 2001) we discovered in the binary system YY Her the presence of the secondary minimum that was indicated, however, by only three photometric observations from one observatory.

Type
The Contributed Papers
Information
International Astronomical Union Colloquium , Volume 194: Compact binaries in the galaxy and beyond , 2004 , pp. 222
Copyright
Copyright © Instituto de astronomia/revista mexicana de astronomίa y astrofίsica 2004

References

Hric, L., Petrík, K., Niarchos, P., Velič, Z., Gális, R. 2001, IBVS No. 5046Google Scholar
Mikolajewska, J., Kolotilov, E.A., Shugarov, S. Yu, Yudin, B.F. 2002. AA 392, 197 CrossRefGoogle Scholar