论文标题
使用CCS和NH3观测值研究TMC-1C，L1544和TMC-1的致密核心TMC-1C，L1544和TMC-1的化学和运动学结构
Studying the chemical and kinematical structures of dense cores TMC-1C, L1544, and TMC-1 in the Taurus molecular cloud using the CCS and NH3 observations
论文作者
论文摘要
在预了解恒星形成过程的前核心中的化学和运动学结构的测量至关重要。在这里，我们通过金牛座分子云（TMC-1C，L1544和TMC-1）研究了Thioxoxoethenylidene（CCS）自由基和氨（NH3）分子（NH3）分子（NH3）分子（karl G. Jansky jansky非常大的大型tlescope中的D型，c和cnb cousement and cnb和cnb）。我们的主要结果是基于对TMC-1C核心的CCS观察结果，显示存在复杂的结构。在CCS自由基中观察到相对于灰尘发射的空间偏移。在灰尘峰周围的宽区域中，通过CCS自由基发现了内向运动。我们已经计算了进口速度，并测量了核心内部的湍流。发现湍流是亚音速的。我们获得病毒参数α<1。因此，热和非热运动无法阻止崩溃。从这些核心中的综合强度图观察到CCS和NH3的空间不相互关系，这表明这些分子追踪了核心的不同环境。我们比较CCS的整合通量密度与以前的单端数据的整合通量密度与以前的单端数据相比，并且在干涉量表中发现了少量的通量，表明少量的频率cc cc cc cos cy cy cy cy cos excips的存在，在散布的情况下，逐渐弥漫。
Measurement of chemical and kinematic structures in prestellar cores is essential for better understanding the star formation process. Here, we study the three prestellar cores (TMC-1C, L1544, and TMC-1) of the Taurus molecular cloud by means of the thioxoethenylidene (CCS) radical and ammonia (NH3) molecule observed with Karl G. Jansky Very Large Array telescope in D, C, and CNB configurations. Our main results are based on the CCS observation of the TMC-1C core, showing complex structures are present. Spatial offset relative to dust emission is observed in the CCS radical. Across a wide region around the dust peak, inward motion is found through the CCS radical. We have calculated the infall velocity and measured the turbulence inside the core. The turbulence is found to be subsonic. We obtain the virial parameter α is < 1. Thus, thermal and non-thermal motions cannot prevent the collapse. Spatial incoherence of the CCS and NH3 is observed from the integrated intensity maps in these cores, suggesting that these molecules trace different environments of the cores.We compare the integrated flux densities of CCS with previous single-dish data and find that a small amount of flux is recovered in the interferometric observations, indicating the presence of significant diffuse emission in favorable conditions for producing CCS.
