High angular resolution measurements of Algol
High angular resolution measurements of Algol
复制标题
Algol 的高角分辨率测量
DOI：
10.1086/186976
复制
发表时间：
1993
期刊：
影响因子：
--
通讯作者：
M. Colavita
中科院分区：
文献类型：
--
作者：
Xiaopei Pan;M. Shao;M. Colavita
大陵五（Beta Per）是一个被广泛研究的三元系统，其中包括一个食对。大陵五AB-C系统的几何参数和物理参数是利用长基线光学干涉测量法测定的，其分辨率和精度高于其他技术。在不使用光谱数据的情况下，轨道要素的确定如下：P = 680.05 d +/- 0.06 d，T = JD 2，446，931.4 +/- 1.5，e = 0.225 +/- 0.005，a-双撇= 94.61 +/- 0.22 mas，i = 83.98 deg +/- 0.09 deg，Ω = 310.29度+/- 0.08度，Ω = 312.26度+/- 0.13度。到大陵五的距离被确定为28.2 +/- 0.8 pc。C分量的绝对星等为2.86 +/- 0.46等，质量为1.50 +/- 0.11太阳质量。观测结果表明，食对与宽对的倾角差在1.6度以内。第一次用干涉法观测到了近双星的食，其结果与测光结果相当。
Algol (Beta Per) is an extensively studied triple system which includes an eclipsing pair. Using long baseline optical interferometry, the AB-C system of Algol has had its geometric and physical parameters determined with higher resolution and accuracy than obtained with other techniques. The orbital elements are determined, without the use of spectroscopic data, as follows: P = 680.05 d +/- 0.06 d, T = JD 2,446,931.4 +/- 1.5, e = 0.225 +/- 0.005, a-double-prime = 94.61 +/- 0.22 mas, i = 83.98 deg +/- 0.09 deg, omega = 310.29 deg +/- 0.08 deg, and Omega = 312.26 deg +/- 0.13 deg. The distance to Algol is determined as 28.2 +/- 0.8 pc. The absolute magnitude of the C component is 2.86 +/- 0.46 mag, and its mass is 1.50 +/- 0.11 solar mass. The observational results indicate the difference of the inclinations between the eclipsing pair and the wide pair to be within 1.6 deg. For the first time, the eclipsing of the close pair was observed interferometrically, and the results compare well with those from photometry.