New detection of near-infrared H(2) line emission in AFGL 5157
文献类型：期刊论文
| 作者 | Chen, YF ; Yao, YQ; Yang, J; Zeng, Q; Sato, SJ
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| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2003-07-01 |
| 卷号 | 405期号:2页码:655-661 |
| 关键词 | ISM : lines and bands ISM : individual objects : AFGL 5157 ISM : jets and outflows stars : formation |
| ISSN号 | 0004-6361 |
| 英文摘要 | Narrow-band H(2) v = 1-0 S (1) and broad-band K' imaging observations towards AFGL 5157 revealed a number of new H(2) knots associated with the NH(3) core in the region, implying that the multiple H(2) outflows are driven by a cluster of embedded point sources in the core. The shell around the infrared cluster is more clearly seen than before, showing a few of newly detected ridge-like features. A string of H(2) knots newly revealed along one lobe of the known CO outflow suggests a parsec-scaled jet emanating from a young source in the core. These H(2) outflows and jet, together with the known compact H II region, radio continuum source, and H(2)O masers further imply an extremely embedded cluster containing massive stars within it. The evidence shows that the massive young stars within the cluster are in a strong outflow stage of evolution, and together with the nearby infrared cluster in NGC1985, further confirms that star forming process propagates from the west to the east in AFGL 5157. The two types of H(2) line emission, knots and shell, may be indicators of two different stages of star formation in clusters: the shocked H(2) knots are driven by the young stellar sources embraced in the younger cluster, while the diffuse shell-like structure comes from UV photons of relatively evolved cluster. The near-infrared nebula in AFGL 5157 is found to be only associated with the evolved cluster but not observed in the embedded cluster. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics ; Mathematics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STAR-FORMING REGIONS ; DRIVEN MOLECULAR OUTFLOW ; WATER MASER DETECTIONS ; YOUNG STELLAR OBJECTS ; H-II-REGIONS ; H2O MASERS ; JET ; CO ; SIMULATIONS ; AMMONIA |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000183615700029 |
| 公开日期 | 2012-08-08 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/4580]  |
| 专题 | 紫金山天文台_分子云与恒星形成研究团组 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Nagoya Univ, Dept Astrophys, Nagoya, Aichi 4640062, Japan |
| 推荐引用方式 GB/T 7714 | Chen, YF,Yao, YQ,Yang, J,et al. New detection of near-infrared H(2) line emission in AFGL 5157[J]. ASTRONOMY & ASTROPHYSICS,2003,405(2):655-661. |
| APA | Chen, YF,Yao, YQ,Yang, J,Zeng, Q,&Sato, SJ.(2003).New detection of near-infrared H(2) line emission in AFGL 5157.ASTRONOMY & ASTROPHYSICS,405(2),655-661. |
| MLA | Chen, YF,et al."New detection of near-infrared H(2) line emission in AFGL 5157".ASTRONOMY & ASTROPHYSICS 405.2(2003):655-661. |
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来源：紫金山天文台
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