Velocity Space of Galactic O-B Stars
Zi Zhu
【期刊名称】《天文和天体物理学研究》 【年(卷),期】2006(006)003
【摘要】Based on the Hipparcos proper motions and available radial velocity data of O-B stars, we have re-examined the local kinematical structure of the young disk population of ～ 1500 O-B stars not including the Gould-belt stars. A systematic warping motion of the stars about the direction to the Galactic center has been reconfirmed. A negative K-term implying a systematic contraction of stars in the solar vicinity has been detected. Two different distance scales are used in order to find out their impact on the kinematical parameters, and we conclude that the adopted distance scale plays an important role in characterizing the kinematical parameters at the present level of the measurement uncertainty. 【总页数】9页(363-371)
【关键词】astrometry - Galaxy: kinematics and dynamics - stars: early-type - Galaxy:solar neighborhood 【作者】Zi Zhu
【作者单位】Department of Astronomy, Nanjing University, Nanjing 210093
【正文语种】中文
【中图分类】P1 【相关文献】
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Velocity Space of Galactic O-B Stars
