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DETECTION OF 36 GHz CLASS I METHANOL MASER EMISSION TOWARD NGC 253
Ellingsen, Simon P.1; Chen, Xi2,3; Qiao, Hai-Hua2,4; Baan, Willem2; An, Tao2,3; Li, Juan2,3; Breen, Shari L.5
2014-08-01
Source PublicationASTROPHYSICAL JOURNAL LETTERS
Volume790Issue:2
AbstractWe have used the Australia Telescope Compact Array to search for emission from the 4-1 -> 3(0)E transition of methanol (36.2 GHz) toward the center of the nearby starburst galaxy NGC 253. Two regions of emission were detected, offset from the nucleus along the same position angle as the inner spiral arms. The emission is largely unresolved on a scale of 5", has a FWHM line width of < 30 km s(-1), and an isotropic luminosity orders of a magnitude larger than that observed in any Galactic star formation region. These characteristics suggest that the 36.2 GHz methanol emission is most likely a maser, although observations with higher angular and spectral resolution are required to confirm this. If it is a maser, this represents the first detection of a class I methanol maser outside the Milky Way. The 36.2 GHz methanol emission in NGC 253 has more than an order of magnitude higher isotropic luminosity than the widespread emission recently detected toward the center of the Milky Way. If emission from this transition scales with the nuclear star formation rate, then it may be detectable in the central regions of many starburst galaxies. Detection of methanol emission in ultra-luminous infrared galaxies would open up a new tool for testing for variations in fundamental constants (particularly the proton-to-electron mass ratio) on cosmological scales.
KeywordGalaxies: Individual (Ngc 253) Galaxies: Starburst Masers Radio Lines: Ism
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/2041-8205/790/2/L28
WOS KeywordSTARBURST GALAXY NGC-253 ; EXTRAGALACTIC METHANOL ; SUPERNOVA-REMNANTS ; NEARBY GALAXIES ; CH3OH MASER ; SEARCH ; TRANSITIONS ; ABSORPTION ; REGIONS ; GAS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000339897100014
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/15750
Collection毫米波和亚毫米波技术实验室
Affiliation1.Univ Tasmania, Sch Phys Sci, Hobart, Tas, Australia
2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
3.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
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
Ellingsen, Simon P.,Chen, Xi,Qiao, Hai-Hua,et al. DETECTION OF 36 GHz CLASS I METHANOL MASER EMISSION TOWARD NGC 253[J]. ASTROPHYSICAL JOURNAL LETTERS,2014,790(2).
APA Ellingsen, Simon P..,Chen, Xi.,Qiao, Hai-Hua.,Baan, Willem.,An, Tao.,...&Breen, Shari L..(2014).DETECTION OF 36 GHz CLASS I METHANOL MASER EMISSION TOWARD NGC 253.ASTROPHYSICAL JOURNAL LETTERS,790(2).
MLA Ellingsen, Simon P.,et al."DETECTION OF 36 GHz CLASS I METHANOL MASER EMISSION TOWARD NGC 253".ASTROPHYSICAL JOURNAL LETTERS 790.2(2014).
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