arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0705.1810astro-ph
收藏

双星系统Pegasi BB的绝对性质

Absolute properties of the binary system BB Pegasi

B. Kalomeni, K. Yakut, V. Keskin, O. L. Degirmenci, B. Ulas, O. Kose

摘要:

本文介绍了低温接触双星BB Peg的地基测光。我们收集了文献中所有的月食时间,并将它们与本研究中获得的时间相结合。对数据的分析表明,周期增加了3.0(1)x 10 ^{-8}天/年。BB Peg的这种周期性增加可以用2.4 x 10 ^{-8} Ms yr ^{-1}的质量转移来解释。通过同时求解光和径向速度曲线,确定了其物理参数:Mc = 1.42Ms,Mh = 0.53Ms,Rc = 1.29Rs,Rh = 0.83Rs,Lc = 1.86Ls,Lh = 0.94Ls。通过周期变化分析,得到了第三体的轨道参数。该系统是比较类似的二进制的赫兹-罗素和质量半径图。

英文摘要:

We present a ground based photometry of the low-temperature contact binary BB Peg. We collected all times of mid-eclipses available in literature and combined them with those obtained in this study. Analyses of the data indicate a period increase of 3.0(1) x 10^{-8} days/yr. This period increase of BB Peg can be interpreted in terms of the mass transfer 2.4 x 10^{-8} Ms yr^{-1} from the less massive to the more massive component. The physical parameters have been determined as Mc = 1.42 Ms, Mh = 0.53 Ms, Rc = 1.29 Rs, Rh = 0.83 Rs, Lc = 1.86 Ls, and Lh = 0.94 Ls through simultaneous solution of light and of the radial velocity curves. The orbital parameters of the third body, that orbits the contact system in an eccentric orbit, were obtained from the period variation analysis. The system is compared to the similar binaries in the Hertzsprung-Russell and Mass-Radius diagram.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑