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A spectral hardening in the Fermi-LAT Data of 1ES 0502+675

文献类型：期刊论文

作者Ceng YH(曾雨航)1,3; Yan DH(闫大海)1; Hu, Wen2; Wang JC(王建成)1
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2022-02-03
卷号511期号:1页码:938-942
ISSN号0035-8711
关键词radiation mechanisms: non-thermal galaxies: active gamma-rays: galaxies
DOI10.1093/mnras/stac061
产权排序第1完成单位
文献子类Article
英文摘要

The gamma-ray spectral feature of the blazar 1ES 0502+675 is investigated by using Fermi Large Area Telescope Pass 8 data (between 100 MeV and 300 GeV) covering from 2008 August to 2021 April. A significant (similar to 4 sigma) hardening at similar to 1 GeV is found in the gamma-ray spectrum during a moderately flaring state (MJD 55050-55350). The photon index below and above the break energy is Gamma(1) = 2.36 +/- 0.31 and Gamma(2) = 1.33 +/- 0.11, respectively. In the rest of the observations, the gamma-ray spectrum can be described by a power-law form with the photon index of approximate to 1.6. In the frame of a one-zone synchrotron self-Compton (SSC) model, the spectral hardening is interpreted as the transition between the synchrotron component and the SSC component. This could be the result of a slight increase of the break or maximum Lorentz factor of the electrons.

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GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
WOS关键词SPACE-TELESCOPE OBSERVATIONS ; GAMMA-RAY ; SYNCHROTRON-RADIATION ; PHYSICAL-PROPERTIES ; COMPTON ANALYSIS ; X-RAY ; BLAZARS ; MULTIWAVELENGTH ; CATALOG ; MODEL
资助项目National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[NSFC-11803081] ; CAS Youth Innovation Promotion Association ; Basic research Program of Yunnan Province[202001AW070013]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000770033600007
资助机构National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[NSFC-11803081] ; CAS Youth Innovation Promotion Association ; Basic research Program of Yunnan Province[202001AW070013]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/24978]  
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
通讯作者Yan DH(闫大海)
作者单位1.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People’s Republic of China;
2.Department of Physics, Jinggangshan University, Jiangxi Province, Ji’an 343009, People’s Republic of China
3.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China;
推荐引用方式
GB/T 7714		 Ceng YH,Yan DH,Hu, Wen,et al. A spectral hardening in the Fermi-LAT Data of 1ES 0502+675[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2022,511(1):938-942.
APA Ceng YH,Yan DH,Hu, Wen,&Wang JC.(2022).A spectral hardening in the Fermi-LAT Data of 1ES 0502+675.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,511(1),938-942.
MLA Ceng YH,et al."A spectral hardening in the Fermi-LAT Data of 1ES 0502+675".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 511.1(2022):938-942.

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来源：云南天文台

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