论文标题
Mu Arae行星系统：径向速度和天文标准
The mu Arae planetary system: Radial velocities and astrometry
论文作者
论文摘要
使用Hubble空间望远镜的精细引导传感器天文统计以及以前未发表的径向速度措施，我们探索了超球菌系统MU ARAE。我们对径向速度的建模可改善以前已知的成分的轨道元素。我们的天文传统没有任何已知同伴的证据，但为三个同伴群体提供了上限。所有过去的精细引导传感器系外行星的最终摘要导致对小倾斜的偏见（比边式面对面更多）。这种偏见仍无法通过少量统计数据，建模技术，精细的指导传感器机械问题或以噪声为主的数据进行轨道建模来解释。使用我们精致的轨道元素进行数值分析表明，行星D在10^5年的时间表上，使Mu Arae系统动态不稳定，并且与先前的工作一致。
With Hubble Space Telescope Fine Guidance Sensor astrometry and published and previously unpublished radial velocity measures we explore the exoplanetary system mu Arae. Our modeling of the radial velocities results in improved orbital elements for the four previously known components. Our astrometry contains no evidence for any known companion, but provides upper limits for three companion masses. A final summary of all past Fine Guidance Sensor exoplanet astrometry results uncover a bias towards small inclinations (more face-on than edge-on). This bias remains unexplained by either small number statistics, modeling technique, Fine Guidance Sensor mechanical issues, or orbit modeling of noise-dominated data. A numerical analysis using our refined orbital elements suggests that planet d renders the mu Arae system dynamically unstable on a timescale of 10^5 years, in broad agreement with previous work.
