PMO OpenIR  > 毫米波和亚毫米波技术实验室
DETECTION OF A METHANOL MEGAMASER IN A MAJOR-MERGER GALAXY
Chen, Xi1,2; Ellingsen, Simon P.3; Baan, Willem A.1; Qiao, Hai-Hua1,4; Li, Juan1,2; An, Tao1,2; Breen, Shari L.5
2015-02-10
Source PublicationASTROPHYSICAL JOURNAL LETTERS
Volume800Issue:1
AbstractWe have detected emission from both the 4(-1) -> 3(0) E (36.2 GHz) class I and 7(-2) -> 8(-1)E (37.7 GHz) class II methanol transitions toward the center of the closest ultra-luminous infrared galaxy Arp 220. The emission in both methanol transitions shows narrow spectral features and has luminosities approximately 8 orders of magnitude stronger than those observed from typical class I methanol masers observed in Galactic star formation regions. The emission is also orders of magnitude stronger than the expected intensity of thermal emission from these transitions and based on these findings we suggest that the emission from the two transitions are masers. These observations provide the first detection of a methanol megamaser in the 36.2 and 37.7 GHz transitions and represent only the second detection of a methanol megamaser, following the recent report of an 84 GHz methanol megamaser in NGC 1068. We find that the methanol megamasers are significantly offset from the nuclear region and arise toward regions where there is Ha emission, suggesting that they are associated with starburst activity. The high degree of correlation between the spatial distribution of the 36.2 GHz methanol and X-ray plume emission suggests that the production of strong extragalactic class I methanol masers is related to galactic-outflow-driven shocks and perhaps cosmic rays. In contrast to OH and H2O megamasers which originate close to the nucleus, methanol megamasers provide a new probe of feedback (e.g., outflows) processes on larger scales and of star formation beyond the circumnuclear starburst regions of active galaxies.
KeywordIsm: Molecules Masers Stars: Formation
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/2041-8205/800/1/L2
WOS KeywordARP 220 ; MASERS ; SEARCH ; ARP-220 ; DISCOVERY ; EMISSION ; RADIO ; LINES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000349316000002
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15779
Collection毫米波和亚毫米波技术实验室
Affiliation1.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 Tasmania, Sch Phys Sci, Hobart, Tas, Australia
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.CSIRO, Astron & Space Sci, Australia Telescope Natl Facil, Epping, NSW 1710, Australia
Recommended Citation
GB/T 7714
Chen, Xi,Ellingsen, Simon P.,Baan, Willem A.,et al. DETECTION OF A METHANOL MEGAMASER IN A MAJOR-MERGER GALAXY[J]. ASTROPHYSICAL JOURNAL LETTERS,2015,800(1).
APA Chen, Xi.,Ellingsen, Simon P..,Baan, Willem A..,Qiao, Hai-Hua.,Li, Juan.,...&Breen, Shari L..(2015).DETECTION OF A METHANOL MEGAMASER IN A MAJOR-MERGER GALAXY.ASTROPHYSICAL JOURNAL LETTERS,800(1).
MLA Chen, Xi,et al."DETECTION OF A METHANOL MEGAMASER IN A MAJOR-MERGER GALAXY".ASTROPHYSICAL JOURNAL LETTERS 800.1(2015).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Chen, Xi]'s Articles
[Ellingsen, Simon P.]'s Articles
[Baan, Willem A.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Chen, Xi]'s Articles
[Ellingsen, Simon P.]'s Articles
[Baan, Willem A.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Chen, Xi]'s Articles
[Ellingsen, Simon P.]'s Articles
[Baan, Willem A.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.