来自UWISH2的银河平面中的YSO喷流：I -巨蛇座和天鹰座的MHO目录
YSO jets in the Galactic Plane from UWISH2: I - MHO catalogue for Serpens and Aquila
摘要：
年轻恒星天体（YSO）的喷流和外流是目前正在进行的恒星形成的重要标志。为了研究这些天体，我们正在利用英国红外望远镜沿银道面在2.122 μ处的1- 0 S（1）分子氢发射线上进行无偏观测。在本文中，我们关注的是巨蛇座和天鹰座中33平方度大小的区域（18度< l <30度;-1.5度< b <+1.5度）。我们追踪了131个来自YSO的喷流和外流，这导致已知分子氢外流总数增加了15倍。与此相比，所有物体的总积分1- 0 S（1）通量几乎翻了一番，因为已知物体占据了通量分布的亮端。我们的完备性极限是3*10^-18 Wm ^-2，其中70%的天体的通量小于10^-17 Wm ^-2。一般来说，这些流动与巨分子云复合体有关，相对于银道面的尺度高度为25- 30秒差距。我们能够将潜在的源候选者分配给大约一半的对象。通常，流被聚集成3-5个对象的组，在5 pc的半径内。这些群体平均相隔约半度，整个调查区域的三分之二没有流出。我们发现了一个大范围的表观流出长度从4arcsec到130 arcsec。如果我们假设距离为3千秒差距，那么只有10%的外流是秒差距尺度的。大致垂直于银道面的气流位置角有2.6sigma。
英文摘要：
Jets and outflows from Young Stellar Objects (YSOs) are important signposts of currently ongoing star formation. In order to study these objects we are conducting an unbiased survey along the Galactic Plane in the 1-0S(1) emission line of molecular hydrogen at 2.122mu using the UK Infrared Telescope. In this paper we are focusing on a 33 square degree sized region in Serpens and Aquila (18deg < l < 30deg; -1.5deg < b < +1.5deg). We trace 131 jets and outflows from YSOs, which results in a 15 fold increase in the total number of known Molecular Hydrogen Outflows. Compared to this, the total integrated 1-0S(1) flux of all objects just about doubles, since the known objects occupy the bright end of the flux distribution. Our completeness limit is 3*10^-18Wm^-2 with 70% of the objects having fluxes of less than 10^-17Wm^-2. Generally, the flows are associated with Giant Molecular Cloud complexes and have a scale height of 25-30pc with respect to the Galactic Plane. We are able to assign potential source candidates to about half the objects. Typically, the flows are clustered in groups of 3-5 objects, within a radius of 5pc. These groups are separated on average by about half a degree, and 2/3rd of the entire survey area is devoid of outflows. We find a large range of apparent outflow lengths from 4arcsec to 130arcsec. If we assume a distance of 3kpc, only 10% of all outflows are of parsec scale. There is a 2.6sigma over abundance of flow position angles roughly perpendicular to the Galactic Plane.
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。
