AFGL 5157 NH_3 : a new stellar cluster in the forming process
Jiang Zhibo1; Chen Zhiwei1; Yuan Wang1; Ji Yang1; Huang Jiasheng2; Zhang Qizhou2; Giovani Fazio2
Source PublicationResearch in Astronomy and Astrophysics
AbstractWe present the analysis of Spitzer/IRAC and near infrared imaging observation of AFGL 5157, an active star forming region. In the IRAC images, this region shows strong emissions of polycyclic aromatic hydrocarbons in channel 4 and emissions of H_2 in channel 2. Many of the H_2 features are aligned to form jet-like structures. Three bipolar jets in the NH_3 core region and a couple of jets northwest of the core have been identified. We identify the possible driving agents of the bipolar jets and show them to be very young. An embedded cluster has been detected in the NH_3 core; many members in the cluster have spectral energy distributions that increase from JHK bands toward longer wavelengths, indicative of their early evolutionary stages. Millimeter and submillimeter continuum emissions in the NH_3 core and the northwest subregion are found to coincide spatially with these presumable Class 0/I sources. The existence of H_2 bipolar jets and very young stellar objects suggests that star formation is continuing at the present epoch in these subregions. Combining information from previous studies, we propose a sequential star formation scenario in the whole AFGL 5157 region
Document Type期刊论文
2.Harvard-Smithsonian Center for Astrophysics
First Author Affilication中国科学院紫金山天文台
Recommended Citation
GB/T 7714
Jiang Zhibo,Chen Zhiwei,Yuan Wang,et al. AFGL 5157 NH_3 : a new stellar cluster in the forming process[J]. Research in Astronomy and Astrophysics,2013,13(6):695.
APA Jiang Zhibo.,Chen Zhiwei.,Yuan Wang.,Ji Yang.,Huang Jiasheng.,...&Giovani Fazio.(2013).AFGL 5157 NH_3 : a new stellar cluster in the forming process.Research in Astronomy and Astrophysics,13(6),695.
MLA Jiang Zhibo,et al."AFGL 5157 NH_3 : a new stellar cluster in the forming process".Research in Astronomy and Astrophysics 13.6(2013):695.
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