Infall and outflow motions in the high-mass star forming complex G9.62+0.19

• Published in: arXiv.org 2011-01
• Main Authors: Liu, Tie, Wu, Yuefang, Sheng-Yuan, Liu, Sheng-Li, Qin, Yu-Nung Su, Chen, Huei-Ru, Ren, Zhiyuan
• Format: Article
• Language: English
• Subjects: Lobes; Massive stars; Outflow; Star formation
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1101.1580

We present the results of a high resolution study with the Submillimeter Array towards the massive star forming complex G9.62+0.19. Three sub-mm cores are detected in this region. The masses are 13, 30 and 165 M\(_{\sun}\) for the northern, middle and southern dust cores, respectively. Infall motions are found with HCN (4-3) and CS (7-6) lines at the middle core (G9.62+0.19 E). The infall rate is \(4.3\times10^{-3}~M_{\odot}\cdot\)yr\(^{-1}\). In the southern core, a bipolar-outflow with a total mass about 26 M\(_{\sun}\) and a mass-loss rate of \(3.6\times10^{-5}~M_{\odot}\cdot\)yr\(^{-1}\) is revealed in SO (\(8_{7}-7_{7}\)) line wing emission. CS (7-6) and HCN (4-3) lines trace higher velocity gas than SO (\(8_{7}-7_{7}\)). G9.62+0.19 F is confirmed to be the driving source of the outflow. We also analyze the abundances of CS, SO and HCN along the redshifted outflow lobes. The mass-velocity diagrams of the outflow lobes can be well fitted by a single power law. The evolutionary sequence of the cm/mm cores in this region are also analyzed. The results support that UC~H{\sc ii} regions have a higher blue excess than their precursors.