A NEW METHOD TO STUDY THE ORIGIN OF THE EXTRAGALACTIC GAMMA-RAY BACKGROUND AND THE FIRST APPLICATION ON AT20G

doi:10.1088/2041-8205/727/2/L46

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	A NEW METHOD TO STUDY THE ORIGIN OF THE EXTRAGALACTIC GAMMA-RAY BACKGROUND AND THE FIRST APPLICATION ON AT20G
	Zhou M(周明)1,2,3 ; Wang JC(王建成)1,2 ; Gao XY(高小燕)1,2,3 ; Zhou, M (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
发表期刊	ASTROPHYSICAL JOURNAL LETTERS
	2011-02-01
卷号	727 期号:2
DOI	10.1088/2041-8205/727/2/L46
产权排序	第1完成单位
收录类别	SCI
关键词	Gamma Rays: Diffuse Background Methods: Statistical Quasars: General
摘要	In this Letter, we introduce a new method of image stacking to directly study the undetected but possible gamma-ray point sources. Applying the method to the Australia Telescope 20 GHz Survey sources which have not been detected by Large Area Telescope on the Fermi Gamma-ray Space Telescope, we find that the sources contribute (10.5 +/- 1.1)% and (4.3 +/- 0.9)% of the extragalactic gamma-ray background (EGB) and have a very soft spectrum with the photon indices of 3.09 +/- 0.23 and 2.61 +/- 0.26 in the 1-3 GeV and 3-300 GeV energy ranges, respectively. In the 0.1-1 GeV range, they probably contribute a larger fraction to the EGB, but it is not quite certain. It may not be appropriate to assume that the undetected sources have similar properties to the detected sources.
项目资助者	National Natural Science Foundation of China [10778702] ; National Basic Research Program of China (973 Program) [2009CB824800] ; Chinese Academy of Sciences [KJCX2-YW-T24]
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	2041-8205
URL	查看原文
归档日期	2011-03-10
WOS记录号	WOS:000286196200019
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	LARGE-AREA TELESCOPE ; ACTIVE GALACTIC NUCLEI ; SPACE-TELESCOPE ; SOURCE CATALOG ; BLAZARS ; EGRB
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/5014
专题	高能天体物理研究组中国科学院天体结构与演化重点实验室
通讯作者	Zhou, M (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
作者单位	1.National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China 3.Graduate School, Chinese Academy of Sciences, Beijing, China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Zhou M,Wang JC,Gao XY,et al. A NEW METHOD TO STUDY THE ORIGIN OF THE EXTRAGALACTIC GAMMA-RAY BACKGROUND AND THE FIRST APPLICATION ON AT20G[J]. ASTROPHYSICAL JOURNAL LETTERS,2011,727(2).
APA	Zhou M,Wang JC,Gao XY,&Zhou, M .(2011).A NEW METHOD TO STUDY THE ORIGIN OF THE EXTRAGALACTIC GAMMA-RAY BACKGROUND AND THE FIRST APPLICATION ON AT20G.ASTROPHYSICAL JOURNAL LETTERS,727(2).
MLA	Zhou M,et al."A NEW METHOD TO STUDY THE ORIGIN OF THE EXTRAGALACTIC GAMMA-RAY BACKGROUND AND THE FIRST APPLICATION ON AT20G".ASTROPHYSICAL JOURNAL LETTERS 727.2(2011).

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