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Broadband γ-Ray Spectrum of Supernova Remnant Cassiopeia A

文献类型：期刊论文

作者Cao, Zhen1,2,3; Aharonian, F.3,4,5,6; Bai, Y. X.1,3; Bao, Y. W.7; Bastieri, D.8; Bi, X. J.1,2,3; Bi, Y. J.1,3; Bian, W.7; Bukevich, A. V.9; Cai, C. M.10
刊名ASTROPHYSICAL JOURNAL LETTERS
出版日期2025-03-20
卷号982期号:1
ISSN号2041-8205
DOI10.3847/2041-8213/adb97c
产权排序第26完成单位
文献子类Article
英文摘要

The core-collapse supernova remnant (SNR) Cassiopeia A (Cas A) is one of the brightest galactic radio sources with an angular radius of similar to 2.' 5. Although no extension of this source has been detected in the gamma-ray band, using more than 1000 days of LHAASO data above similar to 0.8 TeV, we find that its spectrum is significantly softer than those obtained with Imaging Air Cherenkov Telescopes (IACTs), and its flux near similar to 1 TeV is about 2 times higher. In combination with analyses of more than 16 yr of Fermi-LAT data covering 0.1 GeV-1 TeV, we find that the spectrum above 30 GeV deviates significantly from a single power law and is best described by a smoothly broken power law with a spectral index of 1.90 +/- 0.15(stat) (3.41 +/- 0.19(stat)) below (above) a break energy of 0.63 +/- 0.21(stat) TeV. Given differences in the angular resolution of LHAASO-WCDA and IACTs, TeV gamma-ray emission detected with LHAASO may have a significant contribution from regions surrounding the SNR illuminated by particles accelerated earlier, which, however, are treated as background by IACTs. Detailed modeling can be used to constrain the acceleration processes of TeV particles in the early stage of SNR evolution.

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A SUPERNOVA ; RELATIVISTIC ELECTRONS ; TEV ENERGIES ; EMISSION ; ACCELERATION ; RADIATION ; SPECTROSCOPY ; DENSITY ; ORIGIN ; MODEL
资助项目Chengdu Management Committee of Tianfu New Area ; Department of Science and Technology of Sichuan Province, China[2024ZYD0111] ; Department of Science and Technology of Sichuan Province, China[24NSFSC2319] ; Department of Science and Technology of Sichuan Province, China[2024NSFJQ0060] ; National Key R&D program of China[2024YFA1611403] ; National Natural Science Foundation of China[12220101003] ; National Natural Science Foundation of China[12173039] ; National Natural Science Foundation of China[12393851] ; National Natural Science Foundation of China[12393852] ; National Natural Science Foundation of China[12393853] ; National Natural Science Foundation of China[12393854] ; National Natural Science Foundation of China[12205314] ; National Natural Science Foundation of China[12105301] ; National Natural Science Foundation of China[12305120] ; National Natural Science Foundation of China[12261160362] ; National Natural Science Foundation of China[12105294] ; National Natural Science Foundation of China[U1931201] ; National Natural Science Foundation of China[12375107] ; National Natural Science Foundation of China[12342502] ; Project for Young Scientists in Basic Research of Chinese Academy of Sciences[YSBR-061] ; National Science and Technology Development Agency (NSTDA) of Thailand ; National Research Council of Thailand (NRCT) under the High-Potential Research Team grant program[N42A650868]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001458231300001
出版者IOP Publishing Ltd
资助机构Chengdu Management Committee of Tianfu New Area ; Department of Science and Technology of Sichuan Province, China[2024ZYD0111, 24NSFSC2319, 2024NSFJQ0060] ; National Key R&D program of China[2024YFA1611403] ; National Natural Science Foundation of China[12220101003, 12173039, 12393851, 12393852, 12393853, 12393854, 12205314, 12105301, 12305120, 12261160362, 12105294, U1931201, 12375107, 12342502] ; Project for Young Scientists in Basic Research of Chinese Academy of Sciences[YSBR-061] ; National Science and Technology Development Agency (NSTDA) of Thailand ; National Research Council of Thailand (NRCT) under the High-Potential Research Team grant program[N42A650868]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28282]  
专题星系类星体研究组
云南天文台_丽江天文观测站（南方基地）
云南天文台_高能天体物理研究组
作者单位1.Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, People's Republic of China; lihuicai@ihep.ac.cn, hushicong@ihep.ac.cn;
2.University of Chinese Academy of Sciences, 100049 Beijing, People's Republic of China;
3.TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, People's Republic of China;
4.University of Science and Technology of China, 230026 Hefei, Anhui, People's Republic of China;
5.Yerevan State University, 1 Alek Manukyan Street, Yerevan 0025, Armenia;
6.Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, 69029 Heidelberg, Germany;
7.Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, 200240 Shanghai, People's Republic of China;
8.Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, People's Republic of China;
9.Institute for Nuclear Research of Russian Academy of Sciences, 117312 Moscow, Russia;
10.School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, People's Republic of China; liusm@swjtu.edu.cn;
推荐引用方式
GB/T 7714		 Cao, Zhen,Aharonian, F.,Bai, Y. X.,et al. Broadband γ-Ray Spectrum of Supernova Remnant Cassiopeia A[J]. ASTROPHYSICAL JOURNAL LETTERS,2025,982(1).
APA Cao, Zhen.,Aharonian, F..,Bai, Y. X..,Bao, Y. W..,Bastieri, D..,...&Zuo, X..(2025).Broadband γ-Ray Spectrum of Supernova Remnant Cassiopeia A.ASTROPHYSICAL JOURNAL LETTERS,982(1).
MLA Cao, Zhen,et al."Broadband γ-Ray Spectrum of Supernova Remnant Cassiopeia A".ASTROPHYSICAL JOURNAL LETTERS 982.1(2025).

入库方式： OAI收割

来源：云南天文台

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