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On the Origin of a Possible Hard Very High Energy Spectrum from M87 Discovered by LHAASO

文献类型：期刊论文

作者Xue, Rui2; He, Jia-Chun3; Xiong DR(熊定荣)4,5,6; Wang, Ze-Rui1
刊名ASTROPHYSICAL JOURNAL
出版日期2025-09-10
卷号990期号:2
ISSN号0004-637X
DOI10.3847/1538-4357/adf72c
产权排序第3完成单位
文献子类Article
英文摘要Recent LHAASO observations hint at potential spectral hardening around 20 TeV in M87's very high energy emission, suggesting a possible new radiation component. In this work, we construct averaged multiwavelength spectral energy distributions by combining data from Chandra and Swift-UVOT/XRT covering the same period as the LHAASO detection to investigate the origin of this feature. We test several radiation mechanisms, including the pp interaction, proton synchrotron emission, photomeson process, and two-zone leptonic model. We find that only the pion decay gamma rays in pp interactions can interpret this feature in the framework of the one-zone model. With analytical analysis, we prove that proton synchrotron emission cannot generate a hard spectrum above 0.17 TeV. The photomeson model requires an emission zone compressed near the Schwarzschild radius of the central supermassive black hole, incompatible with broadband optical-GeV spectral constraints. In addition, the two-zone leptonic model also emerges as a viable alternative.
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BROAD-BAND MULTIWAVELENGTH ; GAMMA-RAY EMISSION ; X-RAY ; TEV EMISSION ; JET BASE ; CORE ; ASTROPY ; FLARE ; ACCELERATION ; POLARIZATION
资助项目MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809; Chandra X-ray Observatory[2023YFB4503300]; National Key R&D Program of China[12203043]; National Key R&D Program of China[12203024]; National Key R&D Program of China[12473020]; National Natural Science Foundation of China (NSFC)[YNWR-QNBJ-2020-116]; Yunnan Province Youth Top Talent Project; CAS Light of West China Program
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001564718900001
出版者IOP Publishing Ltd
资助机构MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809 ; Chandra X-ray Observatory[2023YFB4503300] ; National Key R&D Program of China[12203043, 12203024, 12473020] ; National Natural Science Foundation of China (NSFC)[YNWR-QNBJ-2020-116] ; Yunnan Province Youth Top Talent Project ; CAS Light of West China Program
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28565]  
专题云南天文台_丽江天文观测站（南方基地）
通讯作者Xue, Rui
作者单位1.College of Physics and Electronic Engineering, Qilu Normal University, Jinan 250200, People’s Republic of China; zerui_wang62@163.com
2.Department of Physics, Zhejiang Normal University, Jinhua 321004, People’s Republic of China; ruixue@zjnu.edu.cn;
3.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, People’s Republic of China;
4.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, People’s Republic of China; xiongdingrong@ynao.ac.cn;
5.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, People’s Republic of China;
6.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, People’s Republic of China;
推荐引用方式
GB/T 7714		 Xue, Rui,He, Jia-Chun,Xiong DR,et al. On the Origin of a Possible Hard Very High Energy Spectrum from M87 Discovered by LHAASO[J]. ASTROPHYSICAL JOURNAL,2025,990(2).
APA Xue, Rui,He, Jia-Chun,熊定荣,&Wang, Ze-Rui.(2025).On the Origin of a Possible Hard Very High Energy Spectrum from M87 Discovered by LHAASO.ASTROPHYSICAL JOURNAL,990(2).
MLA Xue, Rui,et al."On the Origin of a Possible Hard Very High Energy Spectrum from M87 Discovered by LHAASO".ASTROPHYSICAL JOURNAL 990.2(2025).

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