摘要
利用上海天文台相隔29年的两期天体测量底片,测量了球状星团M79的绝对自行,采用Harris给出的这个星团离开太阳的距离和视向速度数据,计算了星团当前的空间运动速度;根据银河系引力势模型,进一步计算了该星团在银河系中的轨道参数.还对利用自行数据所作的球状星团运动学研究的不确定性作了讨论.
Absolute proper motion determination is made for Galactic globular cluster M79 using photographic plates of Shanghai Observatory, with a time interval of 29 years. Adopting the distance and radial velocity data of this cluster from Harris (1999) and the Galactic gravitational potential model of Allen&Santillan (1991), it is calculated for M79 its present spatial velocity and orbital parameters as well. Further discussion is made on the uncertainties related to the study of the globular cluster kinematics with proper motion data.
出处
《天文学报》
CSCD
北大核心
2005年第2期207-215,共9页
Acta Astronomica Sinica
基金
国家自然科学基金(10373020
10333050)上海市科研计划(04ZR14153)国家973(G1999075406)资助项目
