Detection of 84 GHz Class I Methanol Maser Emission toward NGC 253
文献类型：期刊论文
| 作者 | McCarthy, Tiege P.1,2; Ellingsen, Simon P.2; Breen, Shari L.5; Voronkov, Maxim A.1; Chen, Xi3,4 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2018-11-01 |
| 卷号 | 867期号:1 |
| 关键词 | Galaxies: Individual (Ngc 253) Galaxies: Starburst Masers Radio Lines: Galaxies |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/aae82c |
| 英文摘要 | We have investigated the central region of NGC 253 for the presence of 84.5 GHz (5(-1 -> )4(0)E) methanol emission using the Australia Telescope Compact Array. We present the second detection of 84.5 GHz class I methanol maser emission outside of the Milky Way. This maser emission is offset from the dynamical center of NGC 253, in a region with previously detected emission from class I maser transitions (36.2 GHz 4(-1) -> 3(0)E and 44.1 GHz 7(0) -> 6(1)A(+) methanol lines). The emission features a narrow line-width (similar to 12 km s(-1)) with a luminosity approximately that is 5 orders of magnitude higher than typical Galactic sources. We determine an integrated line intensity ratio of 1.2 +/- 0.4 between the 36.2 and 84.5 GHz class I methanol maser emission, which is similar to the ratio observed toward Galactic sources. The three methanol maser transitions observed toward NGC 253 each show a different distribution, suggesting differing physical conditions between the maser sites, and also that observations of additional class I methanol transitions will facilitate investigations of the maser pumping regime. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000448516900001 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://119.78.226.72/handle/331011/32215]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | McCarthy, Tiege P. |
| 作者单位 | 1.CSIRO, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia 2.Univ Tasmania, Sch Nat Sci, Hobart, Tas 7001, Australia 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.GuangZhou Univ, Ctr Astrophys, Guangzhou 510006, Shanghai, Peoples R China 5.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.,Breen, Shari L.,et al. Detection of 84 GHz Class I Methanol Maser Emission toward NGC 253[J]. ASTROPHYSICAL JOURNAL LETTERS,2018,867(1). |
| APA | McCarthy, Tiege P.,Ellingsen, Simon P.,Breen, Shari L.,Voronkov, Maxim A.,&Chen, Xi.(2018).Detection of 84 GHz Class I Methanol Maser Emission toward NGC 253.ASTROPHYSICAL JOURNAL LETTERS,867(1). |
| MLA | McCarthy, Tiege P.,et al."Detection of 84 GHz Class I Methanol Maser Emission toward NGC 253".ASTROPHYSICAL JOURNAL LETTERS 867.1(2018). |
入库方式： OAI收割
来源：上海天文台
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