Surveys for Pre-Main-Sequence, Short-Period Binary Stars, and Associated Disks

这是一个由两部分组成的项目，研究轨道周期为几年或更短的主序前双星。第一个是使用新的威斯康星-印第安纳-耶鲁- noao (WIYN) 3.5米望远镜和多目标摄谱仪对其中大约400颗恒星进行高精度径向速度调查。预计将发现大约50个周期小于1000天的二进制，是目前数量的三倍。第二个是对先前成功的亚毫米连续辐射的调查的扩大，该调查使用的是JC麦克斯韦望远镜上新的亚毫米阵列探测器，该探测器来自与这些双星相关的原恒星盘。结果将足够精确，以解决从5-50 AU分离双星（那些嵌入在圆盘中的双星）中减少的连续光谱发射是由于双星的形成过程还是由于后来在圆盘中清除间隙的动态扭矩。* * *

Mathieu 9417195 This is a two part project to study pre-main sequence binaries with orbital periods of a few years or less. The first is a high precision radial velocity survey of about 400 of these stars using the new Wisconsin-Indiana-Yale-NOAO (WIYN) 3.5m telescope and multi-object spectrograph. It is expected that about 50 binaries with periods of less than 1000 days, triple the present number, will be found. The second is an enlargement of a previous successful survey for submillimeter continuum emission from protostellar disks associated with these binary stars using the new submillimeter array detector at the JC Maxwell Telescope. The results will be accurate enough to resolve whether the reduced continuum emission from 5-50 AU separation binaries, those embedded in disks, are due to the binary formation processes or from dynamical torques later clearing gaps in the disks. ***