中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Using the Extragalactic Gamma-Ray Background to Constrain the Hubble Constant and Matter Density of the Universe

文献类型:期刊论文

作者Zeng, Houdun1; Yan DH(闫大海)2,3,4
刊名ASTROPHYSICAL JOURNAL
出版日期2019-09-10
卷号882期号:2页码:5
ISSN号0004-637X
关键词galaxies: jets gamma rays: diffuse background gamma rays: galaxies
DOI10.3847/1538-4357/ab35e3
产权排序第2完成单位
文献子类Article
英文摘要

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.

学科主题天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词LIGHT
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)]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000484725300003
资助机构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)]
源URL[http://ir.ynao.ac.cn/handle/114a53/20976]  
专题云南天文台_高能天体物理研究组
云南天文台_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.

入库方式: OAI收割

来源:云南天文台

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。