可能是北方的绘鱼座β和AB剑鱼座移动群的成员
Likely Members of the Beta Pictoris and AB Doradus Moving Groups in the North
摘要：
我们介绍了Schlieder，Lepine和Simon（2012）在北半球Beta Picture和AB Doradus移动群候选列表中跟踪目标的第一个结果。我们获得了27个候选成员的高分辨率近红外光谱，以测量它们的径向速度，并确认一致的组运动学。我们确定了15个候选人一致的预测和测量的径向速度，进行分析，他们的6维（U，V，W，X，Y，Z）银河系运动学，并与已知的组成员分布。基于这些分析，我们提出7个Beta Pic和8个AB Dor候选者可能是新的组成员。可能的新Beta Pic星中有四颗是双星，其中一颗是双线光谱系统。其中三颗AB Dor星是双星。算上所有的二进制组件，我们提出了22个可能的成员，这些年轻的，移动的群体。大多数被提议的成员是M2到M5矮星，最早的是K2型。我们还提出了初步参数的两个新的光谱双星的数据中确定的，拟议的Beta Pic成员和拒绝Beta Pic候选人。到目前为止，我们的候选人选择和后续行动已经确定了40多个低质量的可能成员，这两个移动群体。这些恒星提供了一个新的样本，附近的年轻目标，通过直接成像研究本地恒星形成，磁盘和系外行星，以及低质量区域的天体物理学。
英文摘要：
We present first results from follow-up of targets in the northern hemisphere Beta Pictoris and AB Doradus moving group candidate list of Schlieder, Lepine, and Simon (2012). We obtained high-resolution, near-infrared spectra of 27 candidate members to measure their radial velocities and confirm consistent group kinematics. We identify 15 candidates with consistent predicted and measured radial velocities, perform analyses of their 6-dimensional (U,V,W,X,Y,Z) Galactic kinematics, and compare to known group member distributions. Based on these analyses, we propose that 7 Beta Pic and 8 AB Dor candidates are likely new group members. Four of the likely new Beta Pic stars are binaries; one a double lined spectroscopic system. Three of the proposed AB Dor stars are binaries. Counting all binary components, we propose 22 likely members of these young, moving groups. The majority of the proposed members are M2 to M5 dwarfs, the earliest being of type K2. We also present preliminary parameters for the two new spectroscopic binaries identified in the data, the proposed Beta Pic member and a rejected Beta Pic candidate. Our candidate selection and follow-up has thus far identified more than 40 low-mass, likely members of these two moving groups. These stars provide a new sample of nearby, young targets for studies of local star formation, disks and exoplanets via direct imaging, and astrophysics in the low-mass regime.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
