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Visual orbit of the third body on the eclipsing binary SZ Cam

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Abstract:

On the basis of new speckle interferometric and photometric observations of the eclipsing binary SZ Cam, executed on the 6 m telescope at the Special Astrophysical Observatory, Russian Academy of Sciences, and the 0.5 m telescope of the Astronomical Observatory, Ural State University, and data added from the literature, a complete set of parameters for the apparent relative orbit of the third body are determined for the first time. The mass of the third body, M3=23.4 Mo, and the distance to SZ Cam, d=1125 pc, are estimated. The duality of the third body is confirmed. The assumption is stated that SZ Cam is probably not a member of the open star cluster NGC 1502, on which centre it is projected.

Keywords: Double stars; Eclipsing binary systems; Speckle interferometry; Stellar photometry

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/10556790701306527

Affiliations: 1: Astronomical Observatory, Ural State University, Ekaterinburg, Russia 2: Special Astrophysical Observatory, Russian Academy of Sciences, Zelenchukskaya, Karachaevo-Cherkesia, Russia 3: Subaru Telescope, National Astronomical Observatory of Japan, Tokyo, Japan

Publication date: February 1, 2007

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