Photometric Study of the Possible Cool Quadruple System PY Virginis
作者： L. Y. Zhu , S. B. Qian , N. P. Liu , L. Liu , L. Q. Jiang
DOI: 10.1088/0004-6256/145/2/39
关键词:
摘要: Complete CCD photometric light curves in BV(RI)(c) bands obtained 2012 for the short-period close binary system PY Virginis are presented. A new analysis with Wilson-Van Hamme code shows that Vir is an A-type marginal contact system. The absolute parameters of derived using spectroscopic and solutions. Combining determined times minimum others published literature, O - C diagram star investigated. periodic variation, a period 5.22(+/- 0.05) years amplitude 0.0075(+/- 0.0004) days, was discovered. Since spectrum third component has been detected by Rucinski et al., we consider this cyclic oscillation to be result light-time effect due presence body. This may also itself. Therefore, should quadruple composed two cool-type systems. good astrophysical laboratory study formation evolution binaries multiple
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