An ultrahigh-energy y-ray bubble powered by a super PeVatron

doi:10.1016/j.scib.2023.12.040

	An ultrahigh-energy y-ray bubble powered by a super PeVatron
	Cao, Z.31,32,33; Aharonian, F.1,2; An, Q.3,14; Axikegu 15,16; Bai, Y. X.31,33; Bao, Y. W.17; Bastieri, D.18; Bi, X. J.31,32,33; Bi, Y. J.31,33; Cai, J. T.18
刊名	SCIENCE BULLETIN
	2024-02-26
卷号	69 期号:4 页码:449-457
关键词	Cosmic rays y-rays Interstellar medium Star cluster
ISSN号	2095-9273
DOI	10.1016/j.scib.2023.12.040
产权排序	第29完成单位
文献子类	Article
英文摘要	We report the detection of a y-ray bubble spanning at least 100 deg2 in ultra-high energy (UHE) up to a few PeV in the direction of the star-forming region Cygnus X, implying the presence super PeVatron(s) accelerating protons to at least 10 PeV. A log-parabola form with the photon index C(E) = (2.71 +/- 0.02) + (0.11 +/- 0.02) x log10(E/10 TeV) is found fitting the gamma-ray energy spectrum of the bubble well. UHE sources, hot spots correlated with very massive molecular clouds, and a quasi-spherical amorphous y-ray emitter with a sharp central brightening are observed in the bubble. In the core of - 0.5 degrees, spatially associating with a region containing massive OB association (Cygnus OB2) and a microquasar (Cygnus X-3), as well as previously reported multi-TeV sources, an enhanced concentration of UHE y-rays is observed with 2 photons at energies above 1 PeV. The general feature of the bubble, the morphology, and the energy spectrum, are reasonably reproduced by the assumption of a particle accelerator in the core, continuously injecting protons into the ambient medium. (c) 2023 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
学科主题	天文学
URL标识	查看原文
出版地	RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
资助项目	Chengdu Management Committee of Tianfu New Area
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:001185327600001
资助机构	Chengdu Management Committee of Tianfu New Area
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ynao.ac.cn/handle/114a53/26550]
专题	云南天文台_高能天体物理研究组
作者单位	1.Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland; 2.Max Planck Inst Nucl Phys, POB 103980, D-69026 Heidelberg, Germany; 3.State Key Lab Particle Detect & Elect, Beijing, Peoples R China; 4.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Nanjing 210023, Peoples R China; 5.Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia; 6.Moscow Inst Phys & Technol, Moscow 141700, Russia; 7.Peking Univ, Sch Phys, Beijing 100871, Peoples R China; 8.Guangxi Univ, Sch Phys Sci & Technol, Nanning 530004, Peoples R China; 9.Mahidol Univ, Dept Phys, Fac Sci, Bangkok 10400, Thailand; 10.Nanchang Univ, Ctr Relativist Astrophys & High Energy Phys, Nanchang 330031, Peoples R China;
推荐引用方式 GB/T 7714	Cao, Z.,Aharonian, F.,An, Q.,et al. An ultrahigh-energy y-ray bubble powered by a super PeVatron[J]. SCIENCE BULLETIN,2024,69(4):449-457.
APA	Cao, Z..,Aharonian, F..,An, Q..,Axikegu.,Bai, Y. X..,...&Zuo, X..(2024).An ultrahigh-energy y-ray bubble powered by a super PeVatron.SCIENCE BULLETIN,69(4),449-457.
MLA	Cao, Z.,et al."An ultrahigh-energy y-ray bubble powered by a super PeVatron".SCIENCE BULLETIN 69.4(2024):449-457.