The Rotation Curve of our Galaxy with trigonometric parallax measurements
首发时间:2013-12-24
Abstract:The rotation curve of our Galaxy is derived from a large sample of objects with known radial velocities and distances. We collect data as completely as possible, especially the data with accurately measured trigonometric parallaxes. These observations are used to construct a highly accurate rotation curve of the Galaxy. We discuss how to optimize the source selection for fitting the rotation curve. For each sample we adopted new selection criteria that remove data with large errors. We adopt the more reasonable Galactic constants R0 =8.0kpc, V0 = 220.0km/s. The results show that the fitting curve is a little bit highr for the outer Galaxy and lower for the inner Galaxy than previous results. For the first time we give out the errors of the formulary parameters.
keywords: galaxies: Galaxy structure -- galaxies: spiral -- galaxies:Rotation curve
点击查看论文中文信息
利用三角视差测量研究银河系的旋转曲线
摘要:利用一个大的样本研究我们银河系的旋转曲线,这些数据样本有已知的视向速度和距离。我尽量选择完整的数据,特别是是利用三角视差测量的数据。利用这些观测数据构建一个精确度更大的银河系旋转曲线。讨论了怎样优化选择拟合银河系旋转曲线的数据。对于每一个样本我们采用新的选择标准,剔除误差较大的数据。采用更合理的银河系常数R0 =8.0kpc, V0 = 220.0km/s。拟合的旋转曲线在银河系外部比前人的结果高一点,在银河系内部低一点。首次给出了公式参数的误差。
基金:
论文图表:
引用
No.****
同行评议
共计0人参与
勘误表
利用三角视差测量研究银河系的旋转曲线
评论
全部评论0/1000