Detection of 36 GHz Class I Methanol Maser Emission toward NGC 4945
文献类型：期刊论文
| 作者 | McCarthy, Tiege P.2,3; Ellingsen, Simon P.2; Chen, Xi4,5; Breen, Shari L.6; Voronkov, Maxim A.3; Qiao, Hai-hua1,4 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017-09-10 |
| 卷号 | 846期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | Masers Galaxies: Individual (Ngc 4945) Galaxies: Starburst Radio Lines: Ism |
| DOI | 10.3847/1538-4357/aa872c |
| 英文摘要 | We have searched for emission from the 36.2 GHz (4(-1) -> 3(0)E) methanol transition toward NGC 4945, using the Australia Telescope Compact Array. 36.2 GHz methanol emission was detected offset southeast from the Galactic nucleus. The methanol emission is narrow, with a line width <10 km s(-1) and a luminosity five orders of magnitude higher than Galactic class I masers from the same transition. These characteristics combined the with physical separation from the strong central thermal emission suggests that the methanol emission is a maser. This emission is a factor of similar to 90 more luminous than the widespread emission detected from the Milky Way central molecular zone. This is the fourth detection of extragalactic class I emission and the third detection of extragalactic 36.2 GHz maser emission. These extragalactic class I methanol masers do not appear to be simply highly luminous variants of Galactic class I emission and instead appear to trace large-scale regions of low-velocity shocks in molecular gas, which may precede, or be associated with, the early stages of large-scale star formation. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000410687700004 |
| 源URL | [http://119.78.226.72/handle/331011/32567]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | McCarthy, Tiege P. |
| 作者单位 | 1.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Shaanxi, Peoples R China 2.Univ Tasmania, Sch Phys Sci, Hobart, Tas 7001, Australia 3.CSIRO, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia 4.GuangZhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China 5.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 6.Univ Sydney, Sch Phys, Sydney Inst Astron SIfA, Sydney, NSW 2006, Australia |
| 推荐引用方式 GB/T 7714 | McCarthy, Tiege P.,Ellingsen, Simon P.,Chen, Xi,et al. Detection of 36 GHz Class I Methanol Maser Emission toward NGC 4945[J]. ASTROPHYSICAL JOURNAL,2017,846(2). |
| APA | McCarthy, Tiege P.,Ellingsen, Simon P.,Chen, Xi,Breen, Shari L.,Voronkov, Maxim A.,&Qiao, Hai-hua.(2017).Detection of 36 GHz Class I Methanol Maser Emission toward NGC 4945.ASTROPHYSICAL JOURNAL,846(2). |
| MLA | McCarthy, Tiege P.,et al."Detection of 36 GHz Class I Methanol Maser Emission toward NGC 4945".ASTROPHYSICAL JOURNAL 846.2(2017). |
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来源：上海天文台
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