Using the Extragalactic Gamma-Ray Background to Constrain the Hubble Constant and Matter Density of the Universe

doi:10.3847/1538-4357/ab35e3

YNAO OpenIR > 高能天体物理研究组

	Using the Extragalactic Gamma-Ray Background to Constrain the Hubble Constant and Matter Density of the Universe
	Zeng, Houdun 1; Yan DH(闫大海)2,3,4
发表期刊	ASTROPHYSICAL JOURNAL
	2019-09-10
卷号	882 期号:2 页码:5
DOI	10.3847/1538-4357/ab35e3
产权排序	第2完成单位
收录类别	SCI
关键词	galaxies: jets gamma rays: diffuse background gamma rays: galaxies
摘要	The attenuation produced by extragalactic background light (EBL) in gamma-ray spectra of blazars has been used to constrain the Hubble constant (H-0) and matter density (Omega(m)) of the universe. We propose to estimate H-0 and Omega(m) using the well-measured > 10 GeV extragalactic gamma-ray background (EGB). This suggestion is based on the fact that the > 10 GeV EGB is totally explained by the emissions from blazars, and an EBL-absorption cutoff occurs at similar to 50 GeV in the EGB spectrum. We fit the > 10 GeV EGB data with modeled EGB spectrum. This results in H-0 64.9(-4.3)(+4.6) km s(-1) Mpc(-1) and Omega(m) = 0.31(-0.14)(+0.13). Note that the uncertainties may be underestimated due to the limit of our realization for EBL model. H-0 and Omega(m) are degenerate in our method. Independent determination of Omega(m) by other methods would improve the constraint on H-0.
资助项目	National Natural Science Foundation of China[NSFC-11703094] ; National Natural Science Foundation of China[NSFC-U1738124] ; National Natural Science Foundation of China[NSFC-11803081] ; National Natural Science Foundation of China[NSFC-11573060] ; National Natural Science Foundation of China[NSFC-11661161010] ; Department of Science and Technology of Yunnan Province[2018FY001(-003)] ; CAS "Light of West China" Program ; Youth Innovation Promotion Association ; Yunnan University[2018FY001(-003)]
项目资助者	National Natural Science Foundation of China[NSFC-11703094, NSFC-U1738124, NSFC-11803081, NSFC-11573060, NSFC-11661161010] ; Department of Science and Technology of Yunnan Province[2018FY001(-003)] ; CAS "Light of West China" Program ; Youth Innovation Promotion Association ; Yunnan University[2018FY001(-003)]
语种	英语
学科领域	天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学
文章类型	Article
出版者	IOP PUBLISHING LTD
出版地	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN	0004-637X
URL	查看原文
WOS记录号	WOS:000484725300003
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	LIGHT
引用统计	被引频次：10[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/114a53/20977
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
作者单位	1.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China 3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People's Republic of China 4.Department of Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, Kunming 650091, People's Republic of China
推荐引用方式 GB/T 7714	Zeng, Houdun,Yan DH. Using the Extragalactic Gamma-Ray Background to Constrain the Hubble Constant and Matter Density of the Universe[J]. ASTROPHYSICAL JOURNAL,2019,882(2):5.
APA	Zeng, Houdun,&Yan DH.(2019).Using the Extragalactic Gamma-Ray Background to Constrain the Hubble Constant and Matter Density of the Universe.ASTROPHYSICAL JOURNAL,882(2),5.
MLA	Zeng, Houdun,et al."Using the Extragalactic Gamma-Ray Background to Constrain the Hubble Constant and Matter Density of the Universe".ASTROPHYSICAL JOURNAL 882.2(2019):5.

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