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arXiv 2304.03604astro-ph.SR
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目视三合星系统 HIP 32475 各子星的大气参数

Atmospheric parameters of individual components of the visual triple stellar system HIP 32475

Abdallah M. Hussein, Enas M. Abu-Alrob, Fatima M. Alkhateri, Mashhoor A. Al-Wardat

AI总结:

基于 Al-Wardat 计算分光光度法分析目视三合星系统 HIP 32475 各子星,通过 H-R 图等估计其年龄为 1.259 Gyr,并发现子星 A 已演化至亚巨星阶段。

摘要:

我们对 ABC 目视三合星系统 HIP 32475 的各子星进行了完整分析。AB 子星对是在 Hipparcos 任务期间发现的,角距离为 412 mas。随后在 2015 年,通过在距离 B 子星很小的角距离处发现第三颗子星,该系统新增了 C 子星。在我们的分析中,我们采用 Al-Wardat 的方法来分析双星及多星系统,这是一种计算分光光度法。利用估计的参数,确定了各子星在 H-R 图上的位置、演化迹和等龄线。根据分析,我们估计该系统的年龄为 1.259 Gyr,金属丰度为 $Z=0.019$。结果表明,子星 A 已开始从主序演化至亚巨星阶段,而子星 B 和 C 仍处于主序阶段。

英文摘要:

We present a complete analysis of the individual components of the ABC visual triple system HIP 32475. AB pair was discovered during the Hipparcos mission, with a separation of 412 mas. Later, in 2015, a third component was added to the system by discovering it at a small angular distance from B. In our analysis, we follow Al-Wardat's method for analyzing binary and multiple stellar systems, which is a computational spectrophotometric method. Using estimated parameters, the components' positions on the H-R diagram, evolutionary tracks, and isochrones are defined. Depending on the analysis, we estimate the age of the system as 1.259 Gyr with a metallicity of $Z=0.019$. The results show that component A started to evolve from the main sequence to the sub-giants stage, while components B and C are still in the main sequence stage.

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