GeV gamma-ray EMISSION DETECTED BY FERMI-LAT PROBABLY ASSOCIATED WITH THE THERMAL COMPOSITE SUPERNOVA REMNANT KESTEVEN 41 IN A MOLECULAR ENVIRONMENT

doi:10.1088/0004-637X/809/1/102

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	GeV gamma-ray EMISSION DETECTED BY FERMI-LAT PROBABLY ASSOCIATED WITH THE THERMAL COMPOSITE SUPERNOVA REMNANT KESTEVEN 41 IN A MOLECULAR ENVIRONMENT
	Liu, Bing 2; Chen, Yang 2,3; Zhang, Xiao 2; Zhang, Gao-Yuan 2; Xing, Yi 4; Pannuti, Thomas G.1
刊名	ASTROPHYSICAL JOURNAL
	2015-08-10
卷号	809 期号:1 页码:8
关键词	acceleration of particles gamma rays: ISM ISM: individual objects (Kes 41) ISM: supernova remnants
ISSN号	0004-637X
DOI	10.1088/0004-637X/809/1/102
英文摘要	Hadronic emission from supernova remnant (SNR)-molecular cloud (MC) association systems has been widely regarded as a probe of shock-accelerated cosmic-ray protons. Here, we report on the detection of gamma-ray emission source with a significance of 24 sigma in 0.2-300 GeV, projected to lie to the northwest of the thermal composite SNR Kesteven 41, using 5.6 years of Fermi-Large Area Telescope (LAT) observation data. No significant long-term variability in the energy range 0.2-300 GeV is detected around this source. The 3 sigma error circle, 0 degrees.09 in radius, covers the 1720 MHz OH maser and is essentially consistent with the location of the V-LSR similar to -50 km s(-1) MC with which the SNR interacts. The source emission has an exponential cutoff power-law spectrum with a photon index of 1.9 +/- 0.1 and a cutoff energy of 4.0 +/- 0.9 GeV, and the corresponding 0.2-300 GeV luminosity is similar to 1.3 x 10(36) erg s(-1) at a distance of 12 kpc. There is no radio pulsar in the 3 sigma circle responsible for the high gamma-ray luminosity. While the inverse Compton scattering scenario would lead to difficulty in the electron energy budget, the source emission can naturally be explained by the hadronic interaction between the relativistic protons accelerated by the shock of SNR Kesteven 41 and the adjacent northwestern MC. In this paper, we present a list of Galactic thermal composite SNRs detected at GeV gamma-ray energies by Fermi-LAT.
资助项目	NSFC[11233001] ; NSFC[11403075] ; 973 Program[2015CB857100] ; Educational Ministry of China[20120091110048] ; 985 Project of NJU ; Advanced Discipline Construction Project of Jiangsu Province
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000361653500102
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32904]
专题	中国科学院上海天文台
通讯作者	Chen, Yang
作者单位	1.Morehead State Univ, Dept Earth & Space Sci, Ctr Space Sci, Morehead, KY 40351 USA 2.Nanjing Univ, Dept Astron, Nanjing 210023, Jiangsu, Peoples R China 3.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China 4.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Liu, Bing,Chen, Yang,Zhang, Xiao,et al. GeV gamma-ray EMISSION DETECTED BY FERMI-LAT PROBABLY ASSOCIATED WITH THE THERMAL COMPOSITE SUPERNOVA REMNANT KESTEVEN 41 IN A MOLECULAR ENVIRONMENT[J]. ASTROPHYSICAL JOURNAL,2015,809(1):8.
APA	Liu, Bing,Chen, Yang,Zhang, Xiao,Zhang, Gao-Yuan,Xing, Yi,&Pannuti, Thomas G..(2015).GeV gamma-ray EMISSION DETECTED BY FERMI-LAT PROBABLY ASSOCIATED WITH THE THERMAL COMPOSITE SUPERNOVA REMNANT KESTEVEN 41 IN A MOLECULAR ENVIRONMENT.ASTROPHYSICAL JOURNAL,809(1),8.
MLA	Liu, Bing,et al."GeV gamma-ray EMISSION DETECTED BY FERMI-LAT PROBABLY ASSOCIATED WITH THE THERMAL COMPOSITE SUPERNOVA REMNANT KESTEVEN 41 IN A MOLECULAR ENVIRONMENT".ASTROPHYSICAL JOURNAL 809.1(2015):8.