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题名: Class I methanol megamasers: a potential probe of starburst activity and feedback in active galaxies
作者: Chen, X.1, 2; Ellingsen, S. P.3; Zhang, J. -S.2, 4; Wang, J. -Z.2; Shen, Z. -Q.1; Wu, Q. -W.5; Wu, Z. -Z.6
刊名: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期: 2016-06-11
卷号: 459, 期号:1, 页码:357-365
关键词: masers ; galaxies: ISM ; galaxies: starburst ; radio lines: ISM
DOI: 10.1093/mnras/stw680
文章类型: Article
英文摘要: Previous observations have shown that the distribution of 36.2-GHz class I methanol megamaser (MM) emission in Arp 220 is highly correlated with the diffuse X-rays. On this basis it was suggested that methanol MM may be produced either by the effects of galactic-outflow-driven shocks and/or cosmic rays. Here we report the results of a single-dish survey undertaken with the Greenbank Telescope (GBT) to improve our understanding of the pumping conditions of extragalactic class I methanol masers and their relationship to starburst and feedback processes within the host galaxies, towards a sample which includes 16 galaxies which show both extended soft X-ray emission, and either OH or H2O MM emission. Large baseline ripples in the GBT spectra limited our results to tentative detections towards 11 of the target galaxies. Analysis of these tentative detections shows that there are significant correlations between the methanol intensity and the host-galaxy infrared, radio and OH MM emission, but no correlation with the X-ray and H2O MM emission. Some sources show methanol emission significantly offset from the systemic velocity of the galaxy (by up to 1000 km s(-1)) and we propose that these are associated with galactic-scale outflows from active galactic nuclei (AGNs) feedback. The combined observational properties suggest that class I methanol MMs are related to significant starburst and molecular outflow activity and hence may provide a potential probe of AGN feedback and starburst processes in the host galaxies.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: STAR-FORMATION REGIONS ; MULTIBEAM MASER SURVEY ; INFRARED GALAXIES ; BLACK-HOLE ; XMM-NEWTON ; OH ; EMISSION ; DISCOVERY ; OUTFLOW
收录类别: SCI
项目资助者: National Natural Science Foundation of China(11590781 ; Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)(XDA04060701) ; Key Laboratory for Radio Astronomy, CAS ; 11590784 ; 11133008 ; 11273043)
语种: 英语
WOS记录号: WOS:000376386600028
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16222
Appears in Collections:太阳和太阳系等离子体研究团组_期刊论文

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作者单位: 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China
2.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
3.Univ Tasmania, Sch Math & Phys, Hobart, Tas 7001, Australia
4.GuangZhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China
5.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
6.Guizhou Univ, Coll Sci, Guiyang 550025, Peoples R China
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