Revisiting the Local Kinematics of the Milky Way Based on the New Hipparcos Data

摘要：

Based on the revised Hipparcos data recently released by van Leeuwen, we reexamined the kinematics in the solar neighborhood. Two different populations of objects, namely the thin-disk O-B5 stars and the thick-disk K-M giants, are selected for tracing the kinematical parameters of the Galaxy. Using a 3-D kinematical model, the components of the solar motion and the Oort constants are obtained. Comparing with previous results of other authors, we conclude that the present solution provides a more reliable estimation of the Oort constants, thanks to the revised Hipparcos data that supply even higher accurate astrometric measurements of stars.

关键词： Galaxy solar neighborhood Galaxy kinematics and dynamics

作者: Fang-ting Yuan Zi Zhu Da-Li Kong

作者单位: Department of Astronomy, Nanjing University, China

会议类型: 国际会议

会议名称: The 10th Asian-Pacific Regional International Astronomical Union Meeting(第十届亚洲及太平洋地区天文学大会 APRIM)

会议地点: 昆明

会议语种:英文

页码: 184-185

在线出版日期: 2008-08-03（万方平台首次上网日期，不代表论文的发表时间）