| A Photometric Study of the Near Contact Binary UU Lyncis |
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| 作者姓名： | Soonthornthum Boonrucksar |
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| 作者单位： | Department of |
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| 基金项目： | 国家自然科学基金;中国科学院基金;国家自然科学基金;云南省科技厅资助项目;云南省自然科学基金 |
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| 摘 要： | The near-contact binary UU Lyn with an F3V-type primary was observed in 2005 and 2006. With the latest version of the Wilson-Devinney code, the photometric elements were computed. The results reveal that UU Lyn is a marginal contact system with a large temperature difference of about 1900K between the primary and secondary components. All available eclipse times, including new ones, were used in the analysis. The results show that the orbital period of this system undergoes a continuous decrease at a rate of dP/dt =-1.84× 10-8dyr-1. With the period decrease, UU Lyn may evolve from the present short- period marginal contact system into a contact system with true thermal contact. This target might just be undergoing the cycles predicted by the theory of thermal relaxation oscillations (TRO). It is an interesting example resembling BL And, GW Tau, ZZ Aur, KQ Gem, CN And and AD Cnc, that lie in the key evolutionary stage.
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| 关 键 词： | techniques: photometric—binaries: eclipsing—stars: individual: UU Lyncis |
A Photometric Study of the Near Contact Binary UU Lyncis |
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| Soonthornthum Boonrucksar.A Photometric Study of the Near Contact Binary UU Lyncis[J].Chinese Journal of Astronomy and Astrophysics,2007,7(2):251-257. |
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| Authors: | Li-Ying Zhu Sheng-Bang Qian Soonthornthum Boonrucksar Jia-Jia He Jin-Zhao Yuan |
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| Abstract: | |
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| Keywords: | techniques: photometric - binaries: eclipsing - stars: individual: UU Lyncis |
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