论文标题
加利福尼亚分子云中的第一个嵌入式簇形成
First embedded cluster formation in California molecular cloud
论文作者
论文摘要
我们对LKHA 101嵌入式簇进行了多波长观察，其相邻的85arcmin*60arcmin区域。 LKHA 101嵌入式簇是加利福尼亚分子云（CMC）中的第一个也是唯一的一个重要簇。这些观察结果表明，LKHA 101嵌入式簇位于两个细丝的投影交叉区域。一个细丝是CMC的最高密度部分，另一个是具有低密度气体发射的新型细丝。朝向投影的十字路口，我们发现了连接两个细丝的桥接特征，并识别V形气体结构。这些与两个细丝相互碰撞的情况一致。使用五百米的光圈球射速器（快速），我们测量了LKHA 101 H II区域的RRL速度为0.5 km/s，这与CMC细丝的速度成分有关。此外，在交叉区域之外有一些YSO分布。我们建议，云云的碰撞以及主丝的碎片可能在集群的YSO形成中起重要作用。
We performed a multi-wavelength observation toward LkHa 101 embedded cluster and its adjacent 85arcmin*60arcmin region. The LkHa 101 embedded cluster is the first and only one significant cluster in California molecular cloud (CMC). These observations have revealed that the LkHa 101 embedded cluster is just located at the projected intersectional region of two filaments. One filament is the highest-density section of the CMC, the other is a new identified filament with a low-density gas emission. Toward the projected intersection, we find the bridging features connecting the two filaments in velocity, and identify a V-shape gas structure. These agree with the scenario that the two filaments are colliding with each other. Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we measured that the RRL velocity of the LkHa 101 H II region is 0.5 km/s, which is related to the velocity component of the CMC filament. Moreover, there are some YSOs distributed outside the intersectional region. We suggest that the cloud-cloud collision together with the fragmentation of the main filament may play an important role in the YSOs formation of the cluster.
