Extended Very-High-Energy Gamma-Ray Emission Surrounding PSR J0622+3749 Observed by LHAASO-KM2A
文献类型:期刊论文
作者 | Aharonian, F.26,27; An, Q.4,5; Axikegu20; Bai, L.X.21; Bai, Y.X.2,3; Bao, Y.W.15; Bastieri, D.10; Bi, X.J.1,2,3; Bi, Y.J.2,3; Cai, H.23 |
刊名 | Physical Review Letters |
出版日期 | 2021-06-18 |
卷号 | 126期号:24 |
ISSN号 | 0031-9007 |
DOI | 10.1103/PhysRevLett.126.241103 |
产权排序 | 第25完成单位 |
英文摘要 | We report the discovery of an extended very-high-energy (VHE) gamma-ray source around the location of the middle-aged (207.8 kyr) pulsar PSR J0622+3749 with the Large High-Altitude Air Shower Observatory (LHAASO). The source is detected with a significance of 8.2σ for E>25 TeV assuming a Gaussian template. The best-fit location is (right ascension, declination) =(95.47°±0.11°,37.92°±0.09°), and the extension is 0.40°±0.07°. The energy spectrum can be described by a power-law spectrum with an index of -2.92±0.17stat±0.02sys. No clear extended multiwavelength counterpart of the LHAASO source has been found from the radio to sub-TeV bands. The LHAASO observations are consistent with the scenario that VHE electrons escaped from the pulsar, diffused in the interstellar medium, and scattered the interstellar radiation field. If interpreted as the pulsar halo scenario, the diffusion coefficient, inferred for electrons with median energies of ∼160 TeV, is consistent with those obtained from the extended halos around Geminga and Monogem and much smaller than that derived from cosmic ray secondaries. The LHAASO discovery of this source thus likely enriches the class of so-called pulsar halos and confirms that high-energy particles generally diffuse very slowly in the disturbed medium around pulsars. © 2021 American Physical Society. |
学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 |
URL标识 | 查看原文 |
资助项目 | N/A |
语种 | 英语 |
出版者 | American Physical Society |
资助机构 | N/A |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24431] |
专题 | 云南天文台_高能天体物理研究组 云南天文台_丽江天文观测站(南方基地) |
作者单位 | 1.University of Chinese Academy of Sciences, Beijing, 100049, China; 2.Key Laboratory of Particle Astrophyics and Experimental Physics Division and Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China; 3.TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, 610000, China; 4.State Key Laboratory of Particle Detection and Electronics, Beijing, 100049, China; 5.University of Science and Technology of China, Hefei, Anhui, 230026, China; 6.Department of Engineering Physics, Tsinghua University, Beijing, 100084, China; 7.National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, China; 8.National Space Science Center, Chinese Academy of Sciences, Beijing, 100190, China; 9.School of Physics, Peking University, Beijing, 100871, China; 10.Center for Astrophysics, Guangzhou University, Guangdong, Guangzhou, 510006, China; |
推荐引用方式 GB/T 7714 | Aharonian, F.,An, Q.,Axikegu,et al. Extended Very-High-Energy Gamma-Ray Emission Surrounding PSR J0622+3749 Observed by LHAASO-KM2A[J]. Physical Review Letters,2021,126(24). |
APA | Aharonian, F..,An, Q..,Axikegu.,Bai, L.X..,Bai, Y.X..,...&Zhang, X..(2021).Extended Very-High-Energy Gamma-Ray Emission Surrounding PSR J0622+3749 Observed by LHAASO-KM2A.Physical Review Letters,126(24). |
MLA | Aharonian, F.,et al."Extended Very-High-Energy Gamma-Ray Emission Surrounding PSR J0622+3749 Observed by LHAASO-KM2A".Physical Review Letters 126.24(2021). |
入库方式: OAI收割
来源:云南天文台
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