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:
影响因子:
--
通讯作者:
Ting-Yu Xiao
中科院分区:
文献类型:
--
作者:
Fu-Yuan Xiang;Yun-Xia Yu,;Ting-Yu Xiao
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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影响因子:
10.3
作者:
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通讯作者:
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DOI:
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发表时间:
1971-06
期刊:
The Astrophysical Journal
影响因子:
--
作者:
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通讯作者:
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影响因子:
1.9
作者:
P. Rovithis;H. Rovithis-Livaniou
通讯作者:
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DOI:
10.1046/j.1365-8711.1998.01446.x
发表时间:
1998-06
影响因子:
4.8
作者:
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通讯作者:
Antonino Francesco Lanza;M. Rodonò;R. Rosner
DOI:
10.1086/168867
发表时间:
1990-06
期刊:
The Astrophysical Journal
影响因子:
--
作者:
R. E. Wilson
通讯作者:
R. E. Wilson