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Long-Term Photometric and Spectroscopic Behaviour of Symbiotic System AG Dra

Published online by Cambridge University Press:  22 February 2018

R. Gális ,
L. Hric  and
K. Petrík
R. Gális
Affiliation:
Faculty of Sciences, University of P. J. Šafárik, 041 54 Košice, Slovakia ([email protected])
L. Hric
Affiliation:
Astronomical Institute of the Slovak Academy of Sciences, 059 60 Tatranská Lomnica, Slovakia
K. Petrík
Affiliation:
Faculty of Education, 918 43 Trnava University, Slovakia

Extract

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The general behaviour of AG DRA was studied in the context of the long-term photometry and radial velocity analysis.

AG DRA is a symbiotic binary with quiescent and active stages; the latter may be explainable by increased thermonuclear burning of a white dwarf accreting from the wind of the cool component.

In our previous studies a second period in addition to the orbital period of 549.7 days has been found for AG DRA. Such a period of about 350 days was indicated in our study using photometry (Friedjung et al. 1998, Petrík et al. 1998)as well as radial velocities (Gális et al. 1999 Friedjung et al. 2003).

Type
The Contributed Papers
Information
International Astronomical Union Colloquium , Volume 194: Compact binaries in the galaxy and beyond , 2004 , pp. 242
Copyright
Copyright © Instituto de astronomia/revista mexicana de astronomίa y astrofίsica 2004

References

Friedjung, M., Hric, L., Petrík, K., Gális, R., 1998, A&A 335, 545 Google Scholar
Friedjung, M., Gális, R., Hric, L., Petrík, K., 2003, A&A 400, 595 Google Scholar
Gális, R., Hric, L., Priedjung, M., Petrík, K., 1999, A&A 348, 533 Google Scholar
Iijima, T., Viotti, R. F., 2003, private comm.Google Scholar
Petrík, K., Hric, L., Gális, R., Friedjung, M., Dobrotka, A., 1998, IBVS 4588Google Scholar
Van Hamme, W., Wilson, R. E., 2002, ASP Conf. Ser. 279, 161 Google Scholar