CCD PHOTOMETRIC STUDY AND PERIOD INVESTIGATION OF V508 OPH

CCD PHOTOMETRIC STUDY AND PERIOD INVESTIGATION OF V508 OPH
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V508 OPH的CCD光度研究和周期调查

DOI:
10.1088/0004-6256/149/2/62
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发表时间:
2015-01
期刊:
AJ
影响因子:
--
通讯作者:
Ting-Yu Xiao
Ting-Yu Xiao
中科院分区:
其他
文献类型:
--
作者:
Fu-Yuan Xiang;Yun-Xia Yu,;Ting-Yu Xiao

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本文介绍了兴隆天文台2009年和2010年对V508 Oph的CCD测光观测结果。根据新的观测结果,得出了六个新的最小光照时间。通过使用2003版的Wilson-Devinney程序分析光变曲线。研究发现,非对称光变曲线可以用次级元件上的热点来模拟。过接触度为15.4%,表明该系统是一个浅接触双星。结合新的最小光照时间和数据库中的光电和CCD数据,我们研究了它的轨道周期。结果表明,轨道周期可能正在经历多重变化:以dP / dt = −(1.502 ± 0.063)× 10 − 7?日/年-1,以及周期为24.27(±0.34)年的小周期变化。由于V508 Oph是一个过接触系统,两个组成部分都是晚型星,我们讨论了质量转移,磁活动,第三体和轨道周期变化之间的可能联系。
In this paper, new CCD photometric observations of V508 Oph obtained in 2009 and 2010 at the Xinglong Observatory are presented. From the new observations, six new times of minimum light were derived. The light curves were analyzed by using the 2003 version of the Wilson–Devinney program. It is found that the asymmetric light curves can be modeled by a hot spot on the secondary component. The degree of overcontact is 15.4%, implying that the system is a shallow-contact binary. Combining the new times of minimum light with the photoelectric and CCD data compiled from the database, we investigate its orbital period. The results show that the orbital period may be undergoing multiple changes: a long-term decrease at a rate of dP / dt = − ( 1.502 ± 0.063 ) × 10 − 7 ?> days year−1, and a small periodic variation with a period of 24.27(±0.34) years. Since V508 Oph is an overcontact system and both components are late-type stars, we discuss the possible connection between the mass transfer, magnetic activity, the third body, and the orbital period changes.
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发表时间: 1989-06
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