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Studies of extragalactic background light with TeV BL Lacertae objects
Qin Longhua1; Wang JC(王建成)2,3; Gao Quangui1; Na Weiwei1; Li Huaizhen1; Ma Ju1; Yang Jianping4
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2020-12-01
Volume499Issue:2Pages:2662-2671
DOI10.1093/mnras/staa2634
Contribution Rank第2完成单位
Indexed BySCI
KeywordBL Lacertae objects: general diffuse radiation gamma-rays: galaxies
Abstract

Very high energy (VHE; E >= 100 GeV) gamma-rays from cosmological distances are attenuated by the extragalactic background light (EBL) in the infrared to ultraviolet bands. By contrasting measured versus intrinsic emission,we can derive the EBL photon density. However, we do not know the intrinsic spectra and the EBL separately, only their combined effect. Here we first present a flexible model-dependent optical depth method to study the EBL by fitting the emission spectra of TeV BL Lacertae objects (BL Lacs) via a one-zone leptonic synchrotron self-Compton model (SSC). We have little information about electron energy distributions (EEDs) in the jet, which is critically important to build spectral energy distributions (SEDs) in the SSC scenario. Based on current particle acceleration models, we use two types of EEDs to fit the observed spectra: a power-law log-parabola (PLLP) EED and a broken power-law (BPL) EED. We find that the upper limit of the EBL density is about 30 n W m(-2) sr(-1), which is similar to the published measurement. Furthermore, we propose an unprecedented method to test the radiation mechanisms involved in TeV objects, by simply comparing the reduced EBL density with the limit obtained by galaxy counts. We demonstrate that for some BL Lacs, at least, the one-zone SSC model should be reconsidered.

Funding ProjectNational Natural Science Foundation of China[11663008] ; National Natural Science Foundation of China[11661161010] ; National Natural Science Foundation of China[11802265] ; Science Research Foundation of Yunnan Education Department of China[2017ZZX177] ; Science Research Foundation of Yunnan Education Department of China[2018JS422] ; Science Research Foundation of Yunnan Education Department of China[2019J0733] ; Science Research Foundation of Yunnan Education Department of China[2019J0734] ; Yunnan local colleges applied basic research projects[2019FH001-012] ; Yunnan local colleges applied basic research projects[2019FH001-076] ; Hundred Talents Program of Yuxi
Funding OrganizationNational Natural Science Foundation of China[11663008, 11661161010, 11802265] ; Science Research Foundation of Yunnan Education Department of China[2017ZZX177, 2018JS422, 2019J0733, 2019J0734] ; Yunnan local colleges applied basic research projects[2019FH001-012, 2019FH001-076] ; Hundred Talents Program of Yuxi
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS IDWOS:000587762900083
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordGAMMA-RAY OBSERVATIONS ; COMPTON ANALYSIS ; ENERGY-SPECTRUM ; UPPER LIMITS ; CONSTRAINTS ; RADIATION ; COUNTS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/23948
Collection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
Corresponding AuthorGao Quangui
Affiliation1.Physics Department, Yuxi Normal University, Yuxi, Yunnan, 653100, China
2.Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan, 650011, China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, Yunnan, 650011, China
4.Yunnan Agricultural University, Kunming,Yunnan, 650201, China
Recommended Citation
GB/T 7714
Qin Longhua,Wang JC,Gao Quangui,et al. Studies of extragalactic background light with TeV BL Lacertae objects[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,499(2):2662-2671.
APA Qin Longhua.,Wang JC.,Gao Quangui.,Na Weiwei.,Li Huaizhen.,...&Yang Jianping.(2020).Studies of extragalactic background light with TeV BL Lacertae objects.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,499(2),2662-2671.
MLA Qin Longhua,et al."Studies of extragalactic background light with TeV BL Lacertae objects".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 499.2(2020):2662-2671.
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