论文标题
调查托管中红外气泡N14的扩展系统中的身体状况
Investigating the physical conditions in extended system hosting mid-infrared bubble N14
论文作者
论文摘要
为了观察物理过程，我们提出了一项多波长的研究，对宽尺度环境朝着L = 13.7-14.9度，其中包含中红外气泡N14。在[31.6，46] km/s处对12CO，13CO和C18O气体的分析显示，扩展的物理系统（扩展〜59 pc x 29 PC），该系统至少在D〜3.1 kpc时至少容纳五组Atlasgal 870微米粉尘团。这些在空间上具有不稳定的分子块，并且与几个年轻的恒星物体（平均年龄〜0.44 Myr）相关。在系统中发现了至少三组与扩展的HII区域（包括气泡N14）和嵌入的红外乌云相关的Atlasgal团块（包括气泡N14）。使用GMRT和Thor Radio Continuum数据得出的观察到的光谱指数表明与HII区域存在非热发射。高分辨率GMRT无线电连续图在1280 MHz的轨迹迹象迹象，几个由大型B型恒星驱动的电离团朝向N14，它们的年轻（年龄〜10^3-10^4年）。在本地，恒星形成的早期阶段对所有团块都很明显。 12CO，13CO和C18O的位置图图显示出示波器样速度模式，朝着所选的经度范围内。考虑到系统中存在不同组/子区域的存在，速度的振荡模式表明了碎裂过程。所有这些观察到的发现有利于全局崩溃方案在扩展物理系统中的适用性，这似乎也解释了观察到的层次结构。
To observationally explore physical processes, we present a multi-wavelength study of a wide-scale environment toward l = 13.7 - 14.9 degrees containing a mid-infrared bubble N14. The analysis of 12CO, 13CO, and C18O gas at [31.6, 46] km/s reveals an extended physical system (extension ~59 pc x 29 pc), which hosts at least five groups of the ATLASGAL 870 micron dust clumps at d ~3.1 kpc. These spatially-distinct groups/sub-regions contain unstable molecular clumps, and are associated with several Class I young stellar objects (mean age ~0.44 Myr). At least three groups of ATLASGAL clumps associated with the expanding HII regions (including the bubble N14) and embedded infrared dark clouds, devoid of the ionized gas, are found in the system. The observed spectral indices derived using the GMRT and THOR radio continuum data suggest the presence of non-thermal emission with the HII regions. High resolution GMRT radio continuum map at 1280 MHz traces several ionized clumps powered by massive B-type stars toward N14, which are considerably young (age ~10^3 - 10^4 years). Locally, early stage of star formation is evident toward all the groups of clumps. The position-velocity maps of 12CO, 13CO, and C18O exhibit an oscillatory-like velocity pattern toward the selected longitude range. Considering the presence of different groups/sub-regions in the system, the oscillatory pattern in velocity is indicative of the fragmentation process. All these observed findings favour the applicability of the global collapse scenario in the extended physical system, which also seems to explain the observed hierarchy.
