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| A Photometric Study of the W UMa-type Eclipsing Binary System GSC 0445-1993 | |
| 作者姓名： | M.D.Koppelman |
| 作者单位： | Starhouse Observatory |
| 基金项目： | Supported by the Chinese Academy of Sciences (No. KJCXZSW-T06) The Science and Technology Department of Yunnan Province (2003RC19). |
| 摘 要： | Several new light minimum times for the eclipsing binary GSC 0445-1993 have been determined from the observations by Koppelman et al. and the orbital period of this system was revised. A photometric analysis was carried out using the 2003 version of the Wilson-Devinney code. The results reveal that GSC 0445-1993 is a W-type eclipsing binary with a mass ratio of q = 0.323(±0.002) and an over-contact degree of f = 22.8%(±4.2%). A small temperature difference between the components of △T = 135 K and an orbital inclination of i = 65.7°(±0.3°) were obtained. The asymmetry of its light curve (i.e., the O'Connell effect) for this binary star is explained by the presence of a dark spot on the more massive component. |
| 关 键 词： | 光度测定 重叠双星 恒星 GSC 0445—1993 |
A Photometric Study of the W UMa-type Eclipsing Binary System GSC 0445-1993 |
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| M.D.Koppelman.A Photometric Study of the W UMa-type Eclipsing Binary System GSC 0445-1993[J].Chinese Journal of Astronomy and Astrophysics,2005,5(2):137-143. | |
| Authors: | Yuan-Gui Yang Sheng-Bang Qian and M D Koppelman National Astronomical Observatories /Yunnan Observatory Chinese Academy of Sciences Kunming yygcn@com United Laboratory of Optical Astronomy Chinese Academy of Sciences |
| Abstract: | |
| Keywords: | stars: binaries: close-stars: binaries: eclipsing-star: individual:GSC 0445-1993 |
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