【摘要】 本文利用最新的K型星视向速度资料,对太阳附近K型星运动学进行了研究,平均太阳运动的解算值是（u₀,v₀,w₀）=（-9.1±2.2,-20.4±2.6,-5.2±2.5）km/s,与早期一些研究结果的符合程度是令人满意的。按不同年龄组进行分析的结果表明,作为本地静止标准基础的年轻恒星可能存在着某种方向朝外的大尺度运动,另外,我们发现了近距K型星的平均太阳运动与Gould带的运动学状态有着某种表观上的一致性。更多还原

【Abstract】 Data of radial velocities which have recently become available are used for investigation and analysis on kinematics of K-type stars in the solar neighbourhood. It is shown from the solution for the mean solar motion that (u0, v0, w0) = (-9.1±2.2, -20.4±2.6, -5.2±2.5) km/s, being in fair agreement with what has been obtained by some other authors. A similar solution using data of proper motions of the same stars obtained from SAO Catalogue is also made for comparison, and the results from this solution show no departure from the radial velocity solution significantly greater than what can nearly be accounted for in terms of their standard errors. It is found from the solutions after dividing the sample stars into groups according to their (w) velocities that the mean motion of the young disk stars moves outward away from the center of the Galaxy by about 7 km/s with respect to the old disk stars. In addition, it is found that the mean solar motion for these nearby K-stars seems to be apparent consistent with the kinematics for the Gould’s Belt.更多还原