论文标题
四倍系统GJ 225.1和FIN 332的轨道和结构
Orbits and structure of quadruple systems GJ 225.1 and FIN 332
论文作者
论文摘要
只有少数具有两个精确内部视觉轨道的四倍系统。这里研究了两个这样的系统的架构，以确定周期比，相互轨道取向和其他参数。更新的轨道元素及其错误被得出。 Gliese 225.1（髋关节28442）由三个K型和一个M型矮人组成，其内轨道周期为67.2+-0.2和23.4+-0.5 yr。它的内轨道具有较小的相互倾斜度，并且可能与〜2 kyr时期的外轨道共面。四倍系统FIN 332（HIP 92037）由四个早期的A型恒星组成，具有相似的质量和大小。其内部轨道的周期为27.6+-0.2和39.8+-0.4年的偏心率（0.82和0.84）。它们在天空中的方向非常相似。相比之下，〜5 kyr时期的外轨道对内轨道具有较大的相对倾斜度。简要讨论了这些四倍系统的动力和形成。
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.
