论文标题
四倍系统轨道的世俗变化大众LMI
Secular changes in the orbits of the quadruple system VW LMi
论文作者
论文摘要
vw〜lmi是具有2+2个层次结构的最紧密的四倍系统。它由W uma型黯然失色的二进制（p12 = 0.47755天）和另一个分离的非移动二进制（p34 = 7.93天），绕质量的公共中心绕绕着P1234 = 355天。我们介绍了系统的新观察结果，该观察延长了研究系统中长期扰动并改善轨道元素的时间基线。系统的多数据模型（组件的4个径向速度曲线和时序数据）清楚地显示了非渗透二进制的APSidal运动，速率为4.6度/年，但没有其他扰动。这与外部，355天轨道的几乎共同计划以及非精力二进制的7.93天轨道一致。广泛的N体模拟使我们能够限制非处方二进制和外轨道的相互倾斜度，将其限制为J34-1234 <10度。
VW~LMi is the tightest known quadruple system with 2+2 hierarchy. It consists of a W UMa-type eclipsing binary (P12 = 0.47755 days) and another detached non-eclipsing binary (P34 = 7.93 days) orbiting around a common center of mass is about P1234 = 355 days. We present new observations of the system extending the time baseline to study long-term perturbations in the system and to improve orbital elements. The multi-dataset modeling of the system (4 radial-velocity curves for the components and the timing data) clearly showed an apsidal motion in the non-eclipsing binary at a rate of 4.6 degrees/yr, but no other perturbations. This is consistent with the nearly co-planarity of the outer, 355-day orbit, and the 7.93-day orbit of the non-eclipsing binary. Extensive N-body simulations enabled us to constrain the mutual inclination of the non-eclipsing binary and the outer orbits to j34-1234 < 10 degrees.
