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Issue A&A
Volume 456, Number 3, September IV 2006
Page(s) 1069 - 1075
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361:20065146



A&A 456, 1069-1075 (2006)
DOI: 10.1051/0004-6361:20065146

The new pre-cataclysmic binary PG 2200+085

V. Shimansky1, 2, 3, N. A. Sakhibullin1, 2, 3, I. Bikmaev1, 2, H. Ritter4, V. Suleimanov5, 1, 3, N. Borisov6 and A. Galeev1, 2, 7, 3

1  Kazan State University, Kremlevskaja Str., 18, 420008 Kazan, Russia
    e-mail: Slava.Shimansky@ksu.ru
2  Tatarstan Academy of Science, Baumana Str. 20, 420111 Kazan, Russia
3  Kazan Branch of Isaac Newton Institute, Santiago, Chile
4  Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Strasse 1, 85740 Garching, Germany
5  Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, 72076 Tübingen, Germany
6  Special Astrophysical Observatory, 369167 Nizhnij Arkhyz, Russia
7  Department of Theoretical Physics, Tatar State Humanitarian Pedagogical University, Tatarstan Str. 2, 420021 Kazan, Russia

(Received 6 March 2006 / Accepted 24 April 2006)

Abstract
Aims.We present the results of spectroscopic- and orbit-sampled photometric observations of the faint UV-excess object PG 2200+085.
Methods.The optical CCD photometry observations of this object were performed by the Russian-Turkish 1.5-m telescope RTT150 at the TUBITAK National Observatory (Turkey). The long-slit optical spectroscopy observations with 2.6 Å resolution were carried out by 6-m telescope BTA at the Special Astrophysical Observatory (Russia).
Results.The photometric variations over two nights are almost sinusoidal with an amplitude $\Delta m_V = 0\fm04$ and a period of P = 0.3186 d. Such a light curve is typical of a detached close binary with an illumination effect or the ellipsoidal deformation of a secondary star. The observed spectrum clearly displays a featureless blue continuum of a hot component and a rich absorption-line and molecular band K-star spectrum. The CaII line profiles with strong emission cores are remarkably similar to those of V471 Tau.
Conclusions.We tentatively classify PG 2200+085 as a pre-cataclysmic binary of the V471 Tau type.


Key words: stars: binaries: close -- stars: binaries: spectroscopic -- stars: individual: PG 2200+085 -- stars: novae, cataclysmic variables



© ESO 2006


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