Constraints on extragalactic background light using TeV observations of BL Lacertae objects

doi:10.1093/mnras/stad531

	Constraints on extragalactic background light using TeV observations of BL Lacertae objects
	Qin, Longhua 4; Wang JC(王建成)2,3; Gao, Quangui 4; Na, Weiwei 4; Li, Huaizhen 4; Wang, Ao 4; Yang CY(杨初源)2,3; Yang, Jianping 1
刊名	Monthly Notices of the Royal Astronomical Society
	2023-06-01
卷号	521 期号:4 页码:6219-6227
ISSN号	0035-8711
DOI	10.1093/mnras/stad531
产权排序	第2完成单位
文献子类	Journal article (JA)
英文摘要	The extragalactic background light (EBL) in the infrared to ultraviolet bands partly absorbs very high energy (VHE; E ≥ 100 GeV) γ -ray photons travelling over cosmological distances via pair production. In this paper, to get stronger constraints on EBL, we use the deliberate selection of the EBL model and data of five BL Lacs with better statistics and the harder spectra to limit the EBL density and the radiation mechanism of BL Lacs. We constrain the upper limit of the EBL density by fitting the spectral energy distributions of TeV BL Lacs and find that our results are compatible with the published measurement, reaching 50 nW m−2 sr−1. We also obtain that the EBL is not necessarily transparent to VHE photons. We fix the intrinsic spectral index Γi of TeV BL Lacs as 1.0 and 1.5 under observation evidence and model assumption. Comparing the EBL density given by galaxy count and Spitzer observations, we then obtain that 1ES 1101−232 has Γi ≤ 1.0 and 1ES 0229+200 should have Γi not harder than 1.0. We demonstrate that the common radiation assumption of BL Lacs, in which the Γi is softer than 1.5, should be revisited. Furthermore, we propose that the upper EBL density could be given by fitting the hardest energy spectra of TeV BL Lacs. © 2023 The Author(s)
学科主题	天文学
URL标识	查看原文
语种	英语
出版者	Oxford University Press
资助机构	National Natural Science Foundation of China[12063005, 12063006, U2031111]
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/26049]
专题	云南天文台_高能天体物理研究组
作者单位	1.Big Data College, Yunnan Agricultural University, Yunnan, Kunming, 650201, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Yunnan, Kunming, 650011, China; 3.Yunnan Observatory, Chinese Academy of Sciences, Yunnan, Kunming, 650011, China; 4.Department of Physics, Yuxi Normal University, Yunnan, Yuxi, 653100, China;
推荐引用方式 GB/T 7714	Qin, Longhua,Wang JC,Gao, Quangui,et al. Constraints on extragalactic background light using TeV observations of BL Lacertae objects[J]. Monthly Notices of the Royal Astronomical Society,2023,521(4):6219-6227.
APA	Qin, Longhua.,王建成.,Gao, Quangui.,Na, Weiwei.,Li, Huaizhen.,...&Yang, Jianping.(2023).Constraints on extragalactic background light using TeV observations of BL Lacertae objects.Monthly Notices of the Royal Astronomical Society,521(4),6219-6227.
MLA	Qin, Longhua,et al."Constraints on extragalactic background light using TeV observations of BL Lacertae objects".Monthly Notices of the Royal Astronomical Society 521.4(2023):6219-6227.