A survey of T Tauri stars in the nearest star forming regions

我们的主要研究目的是在最近的恒星形成区寻找金牛座T星，以便为原行星盘和/或植物形成的详细研究提供许多样本。因此，我们计划为夏威夷大学（UH） 2.2 m望远镜建造一个新的宽文件光栅光谱仪（WFGS2）。然后，我们计划用WFGS2或其他仪器来搜索这样的金牛座T星，并对它们进行后续的详细研究。2003年11月，我们建造了WFGS2，尽管有些部分还没有完全完成，并通过将其安装在UH 2.2m望远镜上进行了第一次光观测。不幸的是，由于非常恶劣的天气，我们只能获得很少的数据，通过这些数据我们可以确认WFGS2的光学系统按照原始光学设计工作良好。这表明WFGS2有潜力进行快速、广泛的深度调查。利用其他仪器，我们对MBM12进行了牛头T星的调查，除了其他研究人员发现的大约10颗牛头T星外，我们还新发现了4颗牛头T候选者（Ogura, Sugitani et al. 2003）。在MBM12中，我们对包括我们新发现的源在内的金牛座T星进行了毫米观测，并首次在其中三颗星的星周圆盘上探测到毫米连续辐射（Itoh, Sugitani et al. 2003a）。我们还对斯巴鲁进行了观测，并从LkHa 264的星周圆盘上探测到氢气的发射（Itoh, sugitani et al. 2003b）。

Our main purpose of this research is to search for T Tauri stars in the nearest star formin regions in order to provide many samples for detailed studies of protoplanetary disks and/or plant formation. So we planned to build a new wide file grism spectrograph (WFGS2) for the University of Hawaii (UH) 2.2 m telescope. Then we planned to search such T Tauri stars with WFGS2 or with other instruments, and to make follow-up detailed studies of them.In 2003 November we build up WFGS2, although some parts are not perfectly completed, and made the first light observations by mounting it on the UH 2.2m telescope. Unfortunately, due to very bad weather we could obtain only a little data by which we can confirm that the optics of WFGS2 works well following the original optics design. This suggested that WFGS2 has a potential for quick, wide-filed deep surveys.With other instruments, we have surveyed MBM12 for T Taui stars and newly found four T Tauri candidates in addition to about 10 T Tauri stars which other researchers also discovered (Ogura, Sugitani et al. 2003). In MBM12, we made millimeter observations of T Tauri stars including our newly discovered sources and detected millimeter continuum emission form circumstelar disks in three of them for the first time (Itoh, Sugitani et al. 2003a). We also made Subaru observations and detected H2 emission from a circumstellar disk of LkHa 264 (Itoh, sugitani et al. 2003b).