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http://dx.doi.org/10.5140/JASS.2013.30.4.213

The First Comprehensive Photometric Study of the Neglected Binary System V345 Cassiopeiae  

Jeong, Min-Ji (Department of Astronomy & Space Science, Chungbuk National University)
Kim, Chun-Hwey (Department of Astronomy & Space Science, Chungbuk National University)
Publication Information
Journal of Astronomy and Space Sciences / v.30, no.4, 2013 , pp. 213-221 More about this Journal
Abstract
We present the first BVRI CCD photometric observations of V345 Cas made on 22 nights during the observing seasons in 2007-2008. Our light curves, resembling those of EB-type binary stars, are analyzed with the 2003 version of the Wilson-Devinney binary code. The photometric study shows that V345 Cas is a typical semi-detached binary system with the primary star being about ${\Delta}T$ = 2400 K hotter, two times more massive, but only 17% larger than the secondary star being filled with it's Roche-lobe. The orbit has a relatively large inclination of about $88^{\circ}$. A cool spot on the secondary component is modeled to explain a small light curve asymmetry. Absolute dimensions and related radiometric parameters of the eclipsing pair are calculated and their evolutionary states are discussed with the HR diagrams of mass-radius and temperature-luminosity. A period analysis of all available times of minima, including our measurements, indicates that the orbital period may vary in a cyclical way, unfortunately the secondary period for the variation can not be uniquely determined because of lack of present timing data.
Keywords
eclipsing binary star; V345 Cassiopeiae; photometric solution; cool spot; fundamental parameters; evolutionary status;
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