PMO OpenIR  > 星系中的恒星形成研究团组
High resolution observations of the 6 cm H2CO maser in NGC 6240
Wang, Jun-Zhi1,2,3; Zhang, Zhi-Yu3,4,5; Gao, Yu3
2013-03-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume13Issue:3Pages:270-276
Corresponding AuthorWang, JZ (reprint author), Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China. Email: junzhiwang@nju.edu.cn
AbstractWe present high resolution (similar to 1 '') H2CO maser and 5 GHz radio continuum observations toward nearby merging galaxy NGC 6240 made with the Very Large Array in an A configuration. Two concentrations of H2CO emission at about a 6 sigma level have been detected, one of which is associated with the strongest CO peak in the overlap region while the other is about 2 '' southwest of the southern galaxy. Both H2CO concentrations are associated with near infrared H-2 emission, which is thought to be from shocked molecular gas. The total H2CO line luminosity in NGC 6240 is about 60% of that in Arp 220. Based on the distribution of H2CO emission in NGC 6240, which has both active galactic nuclei and an extreme starburst, the H2CO megamaser is likely to be related to the effect of the starburst instead of nuclear activity. Radio continuum cannot be the inversion mechanism of H2CO megamasers, because the two H2CO concentrations in NGC 6240 are not associated with radio continuum emission. Instead, with the association of near infrared H-2 emission, shock dynamics may produce the inverted population of H2CO needed to generate megamasers.
KeywordGalaxies: Ism Galaxies: Kinematics And Dynamics Galaxies: Individual (Ngc 6240)
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/1674-4527/13/3/004
WOS KeywordINFRARED GALAXY NGC-6240 ; FORMALDEHYDE MASERS ; EMISSION ; ABSORPTION ; NGC-7538 ; CATALOG
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000316111400003
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9878
Collection星系中的恒星形成研究团组
Affiliation1.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China
2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China
3.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
4.Max Planck Inst Radioastron, D-53121 Bonn, Germany
5.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Jun-Zhi,Zhang, Zhi-Yu,Gao, Yu. High resolution observations of the 6 cm H2CO maser in NGC 6240[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2013,13(3):270-276.
APA Wang, Jun-Zhi,Zhang, Zhi-Yu,&Gao, Yu.(2013).High resolution observations of the 6 cm H2CO maser in NGC 6240.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,13(3),270-276.
MLA Wang, Jun-Zhi,et al."High resolution observations of the 6 cm H2CO maser in NGC 6240".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 13.3(2013):270-276.
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