A kinematic study of the Taurus-Auriga T association

A kinematic study of the Taurus-Auriga T association
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金牛座-御夫座 T 关联的运动学研究

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发表时间：
2006
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通讯作者：
Claude BertoutFrancoise Genova
Claude BertoutFrancoise Genova
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文献类型：
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作者：
Claude BertoutFrancoise Genova

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目标。这是一系列致力于研究年轻恒星天体附近协会的运动学性质的论文中的第一篇。在这里，我们研究金牛座-御夫座协会，推导出这个低质量恒星形成区的个别成员的运动学的主要目标。方法.我们利用了最近发表的前主序星自行目录，我们补充了来自CDS数据库中各种来源的径向速度。我们使用一种改进的收敛点方法搜索了金牛座-御夫座区域中具有相同空间速度的恒星，我们用大量的蒙特卡罗模拟进行了测试。结果在217金牛座-御夫座已知自行的恒星样本中，我们确定了94个前主序星，它们可能是同一运动群的成员，还有几个额外的候选者，它们的前主序星演化状态需要确认。我们推导出67个已知径向速度的移动群成员的个体松弛，并根据群的平均空间速度给出其他成员的试探性松弛。运动群成员的赫兹-罗素图以及它们的质量和年龄的讨论在另一篇论文中给出。
Aims. This is the first paper in a series dedicated to investigating the kinematic properties of nearby associations of young stellar objects. Here we study the Taurus-Auriga association, with the primary objective of deriving kinematic parallaxes for individual members of this low-mass star-forming region. Methods. We took advantage of a recently published catalog of proper motions for pre-main sequence stars, which we supplemented with radial velocities from various sources found in the CDS databases. We searched for stars of the Taurus-Auriga region that share the same space velocity, using a modified convergent point method that we tested with extensive Monte Carlo simulations. Results. Among the sample of 217 Taurus-Auriga stars with known proper motions, we identify 94 pre-main sequence stars that are probable members of the same moving group and several additional candidates whose pre-main sequence evolutionary status needs to be confirmed. We derive individual parallaxes for the 67 moving group members with known radial velocities and give tentative parallaxes for other members based on the average spatial velocity of the group. The Hertzsprung-Russell diagram for the moving group members and a discussion of their masses and ages are presented in a companion paper.