Detections of 2 cm formaldehyde emissions towards Galactic star-forming regions with 6 cm counterpart
文献类型：期刊论文
| 作者 | Chen, Xi1,2; Shen, Zhi-Qiang1,2; Li, Xiao-Qiong1,3; Yang, Kai1,3; Li, Juan1,2; Wang, Jun-Zhi1,2; Wu, Ya-Jun1,2; Zhao, Rong-Bin1,2; Wang, Jin-Qing1,2; Dong, Jian1,2 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2017-05-01 |
| 卷号 | 466期号:4页码:4364-4369 |
| ISSN号 | 0035-8711 |
| 关键词 | masers stars: formation ISM: molecules radio lines: ISM |
| DOI | 10.1093/mnras/stx011 |
| 通讯作者 | Chen, Xi(chenxi@shao.ac.cn) ; Shen, Zhi-Qiang(zshen@shao.ac.cn) |
| 英文摘要 | We report the detections of H2CO emission at the 2 cm transition towards Galactic starforming regions with known 6 cm counterpart using the Shanghai Tianma Radio Telescope. One significant detection (in NGC 7538) and two possible detections (in G23.01-0.41 and G29.96-0.02) were made. Comparing with previous observations, we found that there is a time lag of appearance of 2 and 6 cm emissions detected in NGC 7538, contradicting with the prediction of radiative pumping via radio continuum radiation. Combinations of the variability of 6 cm masers in NGC 7538 suggest that collisional pumping via high-velocity shocks could better explain the 6 cm H2CO maser emission. Under this scheme, excitation of the 2 cm maser may require a higher collision energy compared to the 6 cm transition. |
| WOS关键词 | VLA OBSERVATIONS ; STELLAR OBJECTS ; MASER ; H2CO ; NGC-7538 ; SEARCH |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | OXFORD UNIV PRESS |
| WOS记录号 | WOS:000402849400043 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/22991]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Chen, Xi; Shen, Zhi-Qiang |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China 3.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Xi,Shen, Zhi-Qiang,Li, Xiao-Qiong,et al. Detections of 2 cm formaldehyde emissions towards Galactic star-forming regions with 6 cm counterpart[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,466(4):4364-4369. |
| APA | Chen, Xi.,Shen, Zhi-Qiang.,Li, Xiao-Qiong.,Yang, Kai.,Li, Juan.,...&Li, Bin.(2017).Detections of 2 cm formaldehyde emissions towards Galactic star-forming regions with 6 cm counterpart.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,466(4),4364-4369. |
| MLA | Chen, Xi,et al."Detections of 2 cm formaldehyde emissions towards Galactic star-forming regions with 6 cm counterpart".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 466.4(2017):4364-4369. |
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来源：紫金山天文台
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