Two particular EA-type binaries in the globular cluster ω Centauri
Li Kai; Qian Shengbang
Source Publication天文和天体物理学研究:英文版
AbstractWe analyzed the B and V light curves of two EA-type binaries V211 and NV358 for the first time using the Wilson-Devinney code. Our analysis shows that V211 is a typical Algol-type binary and NV358 is a well detached binary system. As the two binaries are definite members of ω Centauri due to their proper motion, we estimated their physical parameters, obtaining M1 = 1.13 4±0.03 M⊙, R1 = 0.98±0.01 R⊙, M2 = 0.33 ±0.01 M⊙ and R2 = 0.92 ±0.01 R⊙ forV211; M1 = 1.304-0.05 M⊙, R1 = 1.03±0.01 R⊙, M2 = 0.58±0.02 M⊙ and R2 = 0.78±0.01 R⊙ for NV358. On the color-magnitude diagram of ω Centauri, V211 is located in the faint blue straggler region and its primary component is more massive than a star at the main-sequence turnoff. Therefore, V211 is a blue straggler and was formed by mass transfer from the secondary component to the primary. The age of NV358 is less than 1.93 Gyr, indicating that it is much younger than the first generation of stars in ω Centaufi. Like NV364 in ω Centaufi, NV358 should be a second-generation binary.
Keyword二进制文件 半人马座 球状星团 光变曲线 物理参数 质量传递 威尔逊 恒星年
Document Type期刊论文
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li Kai,Qian Shengbang. Two particular EA-type binaries in the globular cluster ω Centauri[J]. 天文和天体物理学研究:英文版,2013,000(007):827.
APA Li Kai,&Qian Shengbang.(2013).Two particular EA-type binaries in the globular cluster ω Centauri.天文和天体物理学研究:英文版,000(007),827.
MLA Li Kai,et al."Two particular EA-type binaries in the globular cluster ω Centauri".天文和天体物理学研究:英文版 000.007(2013):827.
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