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arXiv 2008.02361astro-ph.SR
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GJ 225.1和FIN 332的轨道和结构

Orbits and structure of quadruple systems GJ 225.1 and FIN 332

A. Tokovinin

摘要:

只有少数的四重系统有两个精确的内视觉轨道是已知的。两个这样的系统的体系结构进行了研究,在这里确定周期比,相互的轨道取向,和其他参数,更新的轨道要素和它们的误差。Gliese 225.1(HIP 28442)由三颗K型和一颗M型矮星组成,内轨道周期分别为67.2 ± 0.2和23.4 ± 0.5年。它的内轨道相互倾斜度很小,很可能与周期约为2 kyr的外轨道共面。四重星系FIN 332(HIP 92037)由四颗早期的A型恒星组成,它们的质量和星等相似。它的内轨道周期分别为27.6 ± 0.2年和39.8 ± 0.4年,偏心率分别为0.82和0.84。它们在天空中的方位非常相似。相比之下,周期约为5kyr的外轨道相对于内轨道有很大的倾角。动力学和这些四重系统的形成进行了简要的讨论。

英文摘要:

Only a handful of quadruple systems with two accurate inner visual orbits are known. Architecture of two such systems is studied here to determine period ratios, mutual orbit orientation, and other parameters; updated orbital elements and their errors are derived. Gliese 225.1 (HIP 28442) is composed of three K-type and one M-type dwarfs and has inner orbital periods of 67.2+-0.2 and 23.4+-0.5 yr. Its inner orbits have small mutual inclination and are likely coplanar with the outer orbit of ~2 kyr period. The quadruple system FIN 332 (HIP 92037) consists of four early A type stars with similar masses and magnitudes. Both its inner orbits with periods of 27.6+-0.2 and 39.8+-0.4 yr have large eccentricities (0.82 and 0.84). Their orientation in the sky is remarkably similar. In contrast, the outer orbit with a period of ~5 kyr has a large relative inclination to the inner orbits. Dynamics and formation of these quadruple systems are briefly discussed.

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。

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