中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 云南天文台
  3. 中国科学院云南天文台
  4. 星系类星体研究组
An Enigmatic PeVatron in an Area around HII Region G35.6-0.5

文献类型：期刊论文

作者Cao, Zhen35,36,37; Aharonian, F.33,34; Axikegu32; Bai, Y. X.35,37; Bao, Y. W.31; Bastieri, D.30; Bi, X. J.35,36,37; Bi, Y. J.35,37; Bian, W.29; Bukevich, A. V.28
刊名ASTROPHYSICAL JOURNAL
出版日期2025-01-20
卷号979期号:1
关键词Unified Astronomy Thesaurus concepts: Gamma-rays (637) Gamma-ray sources (633) H II regions (694) Supernova remnants (1667)
ISSN号0004-637X
DOI10.3847/1538-4357/ad991d
产权排序第27完成单位
文献子类Article
英文摘要Identifying Galactic PeVatrons (PeV particle accelerators) from ultrahigh-energy (UHE, >100 TeV)gamma-ray sources plays a crucial role in revealing the origin of Galactic cosmic rays. The UHE source 1LHAASO J1857+0203u is suggested to be associated with HESS J1858+020, which may be attributed to the possible PeVatron candidate supernova remnant (SNR) G35.6-0.4 or H II region G35.6-0.5. We perform detailed analysis on the very-high-energy and UHE gamma-ray emissions toward this region with data from the Large High Altitude Air Shower Observatory (LHAASO). 1LHAASO J1857+0203u is detected with a significance of 11.6 sigma above 100 TeV, indicating the presence of a PeVatron. It has an extent of similar to 0 degrees.18 with a power-law (PL) spectral index of similar to 2.5 at 1-25 TeV and pointlike emission with a PL spectral index of similar to 3.2 above 25 TeV. Using archival CO and H I data, we identify some molecular and atomic clouds that may be associated with the TeV gamma-ray emissions. Our modeling indicates that the TeV gamma-ray emissions are unlikely to arise from clouds illuminated by the protons that escaped from SNR G35.6-0.4. In the scenario in which H II region G35.6-0.5 could accelerate particles to the UHE band, the observed GeV-TeV gamma-ray emission could be well explained by a hadronic model with a PL spectral index of similar to 2.0 and cutoff energy of similar to 450 TeV. However, an origin in an evolved pulsar wind nebula cannot be ruled out.
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HI/OH/RECOMBINATION LINE SURVEY ; MOLECULAR CLOUDS ; COSMIC-RAYS ; CRAB-NEBULA ; GAMMA-RAYS ; EMISSION ; ACCELERATION ; ELECTRONS ; COMPLEX ; ASTROPY
资助项目Natural Sciences and Engineering Research Council of Canada; U.S. National Science Foundation; China by NSFC[12393852]; China by NSFC[12173018]; China by NSFC[12121003]; China by NSFC[U1931204]; National Key R&D program of China[2018YFA0404201]; National Key R&D program of China[2018YFA0404202]; National Key R&D program of China[2018YFA0404203]; National Key R&D program of China[2018YFA0404204]; National Science and Technology Development Agency (NSTDA); National Research Council of Thailand (NRCT) under the High-Potential Research Team Grant Program[N42A650868]; Chengdu Management Committee of Tianfu New Area
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001413397400001
出版者IOP Publishing Ltd
资助机构Natural Sciences and Engineering Research Council of Canada ; U.S. National Science Foundation ; China by NSFC[12393852, 12173018, 12121003, U1931204] ; National Key R&D program of China[2018YFA0404201, 2018YFA0404202, 2018YFA0404203, 2018YFA0404204] ; National Science and Technology Development Agency (NSTDA) ; National Research Council of Thailand (NRCT) under the High-Potential Research Team Grant Program[N42A650868] ; Chengdu Management Committee of Tianfu New Area
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28215]  
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.School of Physics and Technology, Nanjing Normal University, 210023 Nanjing, Jiangsu, People's Republic of China; xiaozhang@njnu.edu.cn
2.School of Physics, Huazhong University of Science and Technology, Wuhan 430074, Hubei, People's Republic of China;
3.National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, People's Republic of China;
4.Center for Relativistic Astrophysics and High Energy Physics, School of Physics and Materials Science & Institute of Space Science and Technology, Nanchang University, 330031 Nanchang, Jiangxi, People's Republic of China;
5.Moscow Institute of Physics and Technology, 141700 Moscow, Russia;
6.Department of Physics, Faculty of Science, Mahidol University, Bangkok 10400, Thailand;
7.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, 530004 Nanning, Guangxi, People's Republic of China;
8.School of Physics, Peking University, 100871 Beijing, People's Republic of China;
9.College of Physics, Sichuan University, 610065 Chengdu, Sichuan, People's Republic of China;
10.China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China;
推荐引用方式
GB/T 7714		 Cao, Zhen,Aharonian, F.,Axikegu,et al. An Enigmatic PeVatron in an Area around HII Region G35.6-0.5[J]. ASTROPHYSICAL JOURNAL,2025,979(1).
APA Cao, Zhen.,Aharonian, F..,Axikegu.,Bai, Y. X..,Bao, Y. W..,...&Zuo, X..(2025).An Enigmatic PeVatron in an Area around HII Region G35.6-0.5.ASTROPHYSICAL JOURNAL,979(1).
MLA Cao, Zhen,et al."An Enigmatic PeVatron in an Area around HII Region G35.6-0.5".ASTROPHYSICAL JOURNAL 979.1(2025).

入库方式： OAI收割

来源：云南天文台

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。