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Deep view of composite SNR CTA1 with LHAASO in γ-rays up to 300 TeV

文献类型：期刊论文

作者Cao, Zhen34,35,36; Aharonian, F.32,33; Axikegu31; Bai, Y. X.34,36; Bao, Y. W.30; Bastieri, D.29; Bi, X. J.34,35,36; Bi, Y. J.34,36; Bian, W.28; Bukevich, A. V.27
刊名Science China: Physics, Mechanics and Astronomy
出版日期2025-07
卷号68期号:7
关键词PWN gamma-ray UHE
ISSN号1674-7348
DOI10.1007/s11433-024-2479-4
产权排序第26完成单位
文献子类Article
英文摘要The ultra-high-energy (UHE) gamma-ray source 1LHAASO J0007+7303u is positionally associated with the composite SNR CTA1 that is located at high Galactic Latitude b ≈ 10.5°. This provides a rare opportunity to spatially resolve the component of the pulsar wind nebula (PWN) and supernova remnant (SNR) at UHE. This paper conducted a dedicated data analysis of 1LHAASO J0007+7303u using the data collected from December 2019 to July 2023. This source is well detected with significances of 21σ and 17σ at 8–100 TeV and >100 TeV, respectively. The corresponding extensions are determined to be 0.23°±0.03° and 0.17°±0.03°. The emission is proposed to originate from the relativistic electrons accelerated within the PWN of PSR J0007+7303. The energy spectrum is well described by a power-law with an exponential cutoff function dN/dE=(42.4±4.1)(E20TeV)−2.31±0.11exp(−E110±25TeV) TeV−1 cm−2 s−1 in the energy range from 8 to 300 TeV, implying a steady-state parent electron spectrum dNe/dEe∝(Ee100TeV)−3.13±0.16exp[(−Ee373±70TeV)2] at energies above ≈ 50 TeV. The cutoff energy of the electron spectrum is roughly equal to the expected current maximum energy of particles accelerated at the PWN terminal shock. Combining the X-ray and gamma-ray emission, the current space-averaged magnetic field can be limited to ≈ 4.5 µG. To satisfy the multi-wavelength spectrum and the γ-ray extensions, the transport of relativistic particles within the PWN is likely dominated by the advection process under the free-expansion phase assumption. © Science China Press 2025.
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16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA
WOS关键词SUPERNOVA REMNANT CTA1 ; PULSAR WIND NEBULAE ; X-RAY ; CRAB-NEBULA ; EMISSION ; MODEL ; EVOLUTION ; RADIO ; CONSTRAINTS ; POPULATION
资助项目National Natural Science Foundation of China[12393851]; National Natural Science Foundation of China[12393854]; National Natural Science Foundation of China[12393852]; National Natural Science Foundation of China[12393853]; National Natural Science Foundation of China[12022502]; National Natural Science Foundation of China[12205314]; National Natural Science Foundation of China[12105301]; 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[2024NSFJQ0060]; Thailand by the National Science and Technology Development Agency (NSTDA); National Research Council of Thailand (NRCT) under the High-Potential Research Team Grant Program[N42A650868]
WOS研究方向Physics
语种英语
WOS记录号WOS:001420271900001
出版者SCIENCE PRESS
资助机构National Natural Science Foundation of China[12393851, 12393854, 12393852, 12393853, 12022502, 12205314, 12105301, 12261160362, 12105294, U1931201, 2024NSFJQ0060] ; Thailand by the National Science and Technology Development Agency (NSTDA) ; 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/114a53/28166]  
专题星系类星体研究组
作者单位1.School of Physics and Astronomy (Zhuhai) & Sino-French Institute of Nuclear Engineering and Technology (Zhuhai), Sun Yat-sen University, Zhuhai, 519000, China;
2.School of Physics (Guangzhou), Sun Yat-sen University, Guangzhou, 510275, China
3.School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China;
4.National Space Science Center, Chinese Academy of Sciences, Beijing, 100190, China;
5.Center for Relativistic Astrophysics and High Energy Physics, School of Physics and Materials Science & Institute of Space Science and Technology, Nanchang University, Nanchang, 330031, China;
6.Moscow Institute of Physics and Technology, Moscow, 141700, Russia;
7.Department of Physics, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand;
8.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China;
9.School of Physics, Peking University, Beijing, 100871, China;
10.College of Physics, Sichuan University, Chengdu, 610065, China;
推荐引用方式
GB/T 7714		 Cao, Zhen,Aharonian, F.,Axikegu,et al. Deep view of composite SNR CTA1 with LHAASO in γ-rays up to 300 TeV[J]. Science China: Physics, Mechanics and Astronomy,2025,68(7).
APA Cao, Zhen.,Aharonian, F..,Axikegu.,Bai, Y. X..,Bao, Y. W..,...&Shu, F. W..(2025).Deep view of composite SNR CTA1 with LHAASO in γ-rays up to 300 TeV.Science China: Physics, Mechanics and Astronomy,68(7).
MLA Cao, Zhen,et al."Deep view of composite SNR CTA1 with LHAASO in γ-rays up to 300 TeV".Science China: Physics, Mechanics and Astronomy 68.7(2025).

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来源：云南天文台

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