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arXiv 1302.6935astro-ph.SRastro-ph.GA
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恒星活动作为移动星系团的示踪剂

Stellar activity as a tracer of moving groups

F. Murgas, J. S. Jenkins, P. Rojo, H. R. A Jones, D. J. Pinfield

备注：
Accepted for publication in A&A
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摘要：

本文介绍了用完全运动学（银河系速度U、V、W）和色球活动指数$\log R'_{\rm{HK}}$研究太阳附近恒星活动的结果。我们使用2529颗恒星的样本分析了已知移动群体中心附近的平均活动水平，发现这些协会附近的恒星往往比场星更活跃。这支持了这样一个假设，即这些结构，或者至少是其中的重要部分，是由运动学上束缚的年轻恒星组成的。我们证实了我们的研究结果，使用银河系演化探测器（GALEX）的紫外线数据和运动学从日内瓦-哥本哈根调查的样本中的恒星。最后，我们提出了一个汇编目录的运动学和活动的2529颗恒星和一个列表的潜在的移动组成员选择的基础上，他们的恒星活动水平。

英文摘要：

We present the results of a study of the stellar activity in the solar neighborhood using complete kinematics (galactocentric velocities U,V,W) and the chromospheric activity index $\log R'_{\rm{HK}}$. We analyzed the average activity level near the centers of known moving groups using a sample of 2529 stars and found that the stars near these associations tend to be more active than field stars. This supports the hypothesis that these structures, or at least a significant part of them, are composed of kinematically bound, young stars. We confirmed our results by using Galaxy Evolution Explorer (GALEX) UV data and kinematics taken from the Geneva-Copenhagen Survey for the stars in the sample. Finally, we present a compiled catalog with kinematics and activities for 2529 stars and a list of potential moving group members selected based on their stellar activity level.

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