High resolution observations of the 6 cm H2CO maser in NGC 6240

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 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-Zhi 1,2,3; Zhang, Zhi-Yu 3,4,5; Gao, Yu3
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2013-03-01
卷号	13 期号:3 页码:270-276
关键词	galaxies: ISM galaxies: kinematics and dynamics galaxies: individual (NGC 6240)
ISSN号	1674-4527
通讯作者	Wang, JZ (reprint author), Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China. Email: junzhiwang@nju.edu.cn
英文摘要	We 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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	INFRARED GALAXY NGC-6240 ; FORMALDEHYDE MASERS ; EMISSION ; ABSORPTION ; NGC-7538 ; CATALOG
收录类别	SCI
语种	英语
WOS记录号	WOS:000316111400003
公开日期	2014-01-08
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/9878]
专题	紫金山天文台_星系中的恒星形成研究团组
作者单位	1.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
推荐引用方式 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.