Direct Evidence for Maser Emission from the 36.2GHz Class I Transition of Methanol in NGC253
文献类型：期刊论文
| 作者 | Chen, Xi1,2,3; Ellingsen, Simon P.4; Shen, Zhi-Qiang2,3; McCarthy, Tiege P.4; Zhong, Wei-Ye2,3; Deng, Hui1 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2018-04-01 |
| 卷号 | 856期号:2 |
| 关键词 | Galaxies: Starburst Ism: Molecules Masers Stars: Formation |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/aab894 |
| 英文摘要 | Observations made with the Jansky Very large Array (JVLA) at an angular resolution of similar to 0 ''.1 have detected class I methanol maser emission from the 36.2 GHz transition toward the starburst galaxy NGC 253. The methanol emission is detected toward four sites which lie within the regions of extended methanol emission detected in previous lower angular resolution (a few arcseconds) observations. The peak flux densities of the detected compact components are in the range 3-9 mJy beam(-1). Combining the JVLA data with single-dish observations from the Shanghai Tianma Radio Telescope (TMRT) and previous interferometric observations with the Australia Telescope Compact Array (ATCA), we show that the 36.2 GHz class I methanol emission consists of both extended and compact structures, with typical scales of similar to 6 ''(0.1 kpc) and similar to 0 ''.05 (1 pc), respectively. The strongest components have a brightness temperature of > 10(3) K, much higher than the maximum kinetic temperature (similar to 100 K) of the thermal methanol emission from NGC 253. Therefore, these observations conclusively demonstrate for the first time the presence of maser emission from a class. I methanol transition in an external galaxy. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000429051000002 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://119.78.226.72/handle/331011/32499]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Chen, Xi |
| 作者单位 | 1.GuangZhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China 2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.Univ Tasmania, Sch Nat Sci, Hobart, Tas 7001, Australia |
| 推荐引用方式 GB/T 7714 | Chen, Xi,Ellingsen, Simon P.,Shen, Zhi-Qiang,et al. Direct Evidence for Maser Emission from the 36.2GHz Class I Transition of Methanol in NGC253[J]. ASTROPHYSICAL JOURNAL LETTERS,2018,856(2). |
| APA | Chen, Xi,Ellingsen, Simon P.,Shen, Zhi-Qiang,McCarthy, Tiege P.,Zhong, Wei-Ye,&Deng, Hui.(2018).Direct Evidence for Maser Emission from the 36.2GHz Class I Transition of Methanol in NGC253.ASTROPHYSICAL JOURNAL LETTERS,856(2). |
| MLA | Chen, Xi,et al."Direct Evidence for Maser Emission from the 36.2GHz Class I Transition of Methanol in NGC253".ASTROPHYSICAL JOURNAL LETTERS 856.2(2018). |
入库方式： OAI收割
来源：上海天文台
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