arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0909.5047astro-ph.SRastro-ph.IM
收藏

大陵五的干涉观测

Interferometric Observations of Algol

T. Borkovits, Sz. Csizmadia, Zs. Paragi, L. Sturmann, J. Sturmann, C. Farrington, H. A. McAlister, Th. ten Brummelaar, N. H. Turner

摘要:

我们确定了空间方位的大陵五AB密切对轨道平面使用光学干涉与CHARA阵列,无线电干涉与欧洲VLBI网络(EVN)。我们发现,密切对节点线的经度是$Ω_1=48°\pm2°$,密切和广泛的对轨道平面的相互倾斜是$95°\pm3°$。后一个值与以前已知的$100°$相差$5°$,后者意味着系统的倾角变化非常快,光度观测不支持。我们还研究了系统的动力学与数值积分的运动方程使用我们的结果作为初始条件。我们发现,在近对的倾斜度(其幅度$\sim 170°$)与约20千年的周期大的变化。这一结果与光度测量观测到的大陵五原初极小期振幅的变化是一致的。

英文摘要:

We determined the spatial orientation of the Algol AB close pair orbital plane using optical interferometry with the CHARA Array, and radio interferometry with the European VLBI Network (EVN). We found the longitude of the line of nodes for the close pair being $Ω_1=48°\pm2°$ and the mutual inclination of the orbital planes of the close and the wide pairs being $95°\pm3°$. This latter value differs by $5°$ from the formerly known $100°$ which would imply a very fast inclination variation of the system, not supported by the photometric observations. We also investigated the dynamics of the system with numerical integration of the equations of motions using our result as an initial condition. We found large variations in the inclination of the close pair (its amplitude $\sim 170°$) with a period of about 20 millenia. This result is in good agreement with the photometrically observed change of amplitude in Algol's primary minimum.

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。

↑