Extended Very-High-Energy Gamma-Ray Emission Surrounding PSR J0622+3749 Observed by LHAASO-KM2A

Aharonian, F.; An, Q.; Axikegu; Bai, L. X.; Bai, Y. X.; Bao, Y. W.; Bastieri, D.; Bi, X. J.; Bi, Y. J.; Cai, H.; Cai, J. T.; Cao, Z.; Chang, J.; Chang, J. F.; Chang, X. C.; Chen, B. M.; Chen, J.; Chen, L.; Chen, M. J.; Chen, M. L.; Chen, Q. H.; Chen, S. H.; Chen, S. Z.; Chen, T. L.; Chen, X. L.; Chen, Y.; Cheng, N.; Cheng, Y. D.; Cui, S. W.; Cui, X. H.; Cui, Y. D.; Dai, B. Z.; Dai, H. L.; Dai, Z. G.; Danzengluobu; della Volpe, D.; Piazzoli, B. D'Ettorre; Dong, X. J.; Fan, J. H.; Fan, Y. Z.; Fan, Z. X.; Fang, J.; Fang, K.; Feng, C. F.; Feng, L.; Feng, S. H.; Feng, Y. L.; Gao, B.; Gao, C. D.; Gao, Q.; Gao, W.; Ge, M. M.; Geng, L. S.; Gong, G. H.; Gou, Q. B.; Gu, M. H.; Guo, J. G.; Guo, X. L.; Guo, Y. Q.; Guo, Y. Y.; Han, Y. A.; He, H. H.; He, H. N.; He, J. C.; He, S. L.; He, X. B.; He, Y.; Heller, M.; Hor, Y. K.; Hou, C.; Hou, X.; Hu, H. B.; Hu, S.; Hu, S. C.; Hu, X. J.; Huang, D. H.; Huang, Q. L.; Huang, W. H.; Huang, X. T.; Huang, Z. C.; Ji, F.; Ji, X. L.; Jia, H. Y.; Jiang, K.; Jiang, Z. J.; Jin, C.; Kuleshov, D.; Levochkin, K.; Li, B. B.; Li, C.; Li, F.; Li, H. B.; Li, H. C.; Li, H. Y.; Li, J.; Li, K.; Li, W. L.; Li, X.; Li, X. R.; Li, Y.; Li, Y. Z.; Li, Z.; Liang, E. W.; Liang, Y. F.; Lin, S. J.; Liu, B.; Liu, C.; Liu, D.; Liu, H.; Liu, H. D.; Liu, J.; Liu, J. L.; Liu, J. S.; Liu, J. Y.; Liu, M. Y.; Liu, R. Y.; Liu, S. M.; Liu, W.; Liu, Y. N.; Liu, Z. X.; Long, W. J.; Lu, R.; Lv, H. K.; Ma, B. Q.; Ma, L. L.; Ma, X. H.; Mao, J. R.; Masood, A.; Mitthumsiri, W.; Montaruli, T.; Nan, Y. C.; Pang, B. Y.; Pattarakijwanich, P.; Pei, Z. Y.; Qi, M. Y.; Ruffolo, D.; Rulev, V; Saiz, A.; Shao, L.; Shchegolev, O.; Sheng, X. D.; Shi, J. R.; Song, H. C.; Stenkin, Yu, V; Stepanov, V; Sun, Q. N.; Sun, X. N.; Sun, Z. B.; Tam, P. H. T.; Tang, Z. B.; Tian, W. W.; Wang, B. D.; Wang, C.; Wang, H.; Wang, H. G.; Wang, J. C.; Wang, J. S.; Wang, L. P.; Wang, L. Y.; Wang, R. N.; Wang, W.; Wang, X. G.; Wang, X. J.; Wang, X. Y.; Wang, Y. D.; Wang, Y. J.; Wang, Y. P.; Wang, Z.; Wang, Z. H.; Wang, Z. X.; Wei, D. M.; Wei, J. J.; Wei, Y. J.; Wen, T.; Wu, C. Y.; Wu, H. R.; Wu, S.; Wu, W. X.; Wu, X. F.; Xi, S. Q.; Xia, J.; Xia, J. J.; Xiang, G. M.; Xiao, G.; Xiao, H. B.; Xin, G. G.; Xin, Y. L.; Xing, Y.; Xu, D. L.; Xu, R. X.; Xue, L.; Yan, D. H.; Yang, C. W.; Yang, F. F.; Yang, J. Y.; Yang, L. L.; Yang, M. J.; Yang, R. Z.; Yang, S. B.; Yao, Y. H.; Yao, Z. G.; Ye, Y. M.; Yin, L. Q.; Yin, N.; You, X. H.; You, Z. Y.; Yu, Y. H.; Yuan, Q.; Zeng, H. D.; Zeng, T. X.; Zeng, W.; Zeng, Z. K.; Zha, M.; Zhai, X. X.; Zhang, B. B.; Zhang, H. M.; Zhang, H. Y.; Zhang, J. L.; Zhang, J. W.; Zhang, L.; Zhang, L. X.; Zhang, P. F.; Zhang, P. P.; Zhang, R.; Zhang, S. R.; Zhang, S. S.; Zhang, X.; Zhang, X. P.; Zhang, Y.; Zhang, Y. F.; Zhang, Y. L.; Zhao, B.; Zhao, J.; Zhao, L.; Zhao, L. Z.; Zhao, S. P.; Zheng, F.; Zheng, Y.; Zhou, B.; Zhou, H.; Zhou, J. N.; Zhou, P.; Zhou, R.; Zhou, X. X.; Zhu, C. G.; Zhu, F. R.; Zhu, H.; Zhu, K. J.; Zuo, X.; Huang, X. Y.

Title	Extended Very-High-Energy Gamma-Ray Emission Surrounding PSR J0622+3749 Observed by LHAASO-KM2A
Authors	Aharonian, F. An, Q. Axikegu Bai, L. X. Bai, Y. X. Bao, Y. W. Bastieri, D. Bi, X. J. Bi, Y. J. Cai, H. Cai, J. T. Cao, Z. Chang, J. Chang, J. F. Chang, X. C. Chen, B. M. Chen, J. Chen, L. Chen, M. J. Chen, M. L. Chen, Q. H. Chen, S. H. Chen, S. Z. Chen, T. L. Chen, X. L. Chen, Y. Cheng, N. Cheng, Y. D. Cui, S. W. Cui, X. H. Cui, Y. D. Dai, B. Z. Dai, H. L. Dai, Z. G. Danzengluobu della Volpe, D. Piazzoli, B. D'Ettorre Dong, X. J. Fan, J. H. Fan, Y. Z. Fan, Z. X. Fang, J. Fang, K. Feng, C. F. Feng, L. Feng, S. H. Feng, Y. L. Gao, B. Gao, C. D. Gao, Q. Gao, W. Ge, M. M. Geng, L. S. Gong, G. H. Gou, Q. B. Gu, M. H. Guo, J. G. Guo, X. L. Guo, Y. Q. Guo, Y. Y. Han, Y. A. He, H. H. He, H. N. He, J. C. He, S. L. He, X. B. He, Y. Heller, M. Hor, Y. K. Hou, C. Hou, X. Hu, H. B. Hu, S. Hu, S. C. Hu, X. J. Huang, D. H. Huang, Q. L. Huang, W. H. Huang, X. T. Huang, Z. C. Ji, F. Ji, X. L. Jia, H. Y. Jiang, K. Jiang, Z. J. Jin, C. Kuleshov, D. Levochkin, K. Li, B. B. Li, C. Li, F. Li, H. B. Li, H. C. Li, H. Y. Li, J. Li, K. Li, W. L. Li, X. Li, X. R. Li, Y. Li, Y. Z. Li, Z. Liang, E. W. Liang, Y. F. Lin, S. J. Liu, B. Liu, C. Liu, D. Liu, H. Liu, H. D. Liu, J. Liu, J. L. Liu, J. S. Liu, J. Y. Liu, M. Y. Liu, R. Y. Liu, S. M. Liu, W. Liu, Y. N. Liu, Z. X. Long, W. J. Lu, R. Lv, H. K. Ma, B. Q. Ma, L. L. Ma, X. H. Mao, J. R. Masood, A. Mitthumsiri, W. Montaruli, T. Nan, Y. C. Pang, B. Y. Pattarakijwanich, P. Pei, Z. Y. Qi, M. Y. Ruffolo, D. Rulev, V Saiz, A. Shao, L. Shchegolev, O. Sheng, X. D. Shi, J. R. Song, H. C. Stenkin, Yu, V Stepanov, V Sun, Q. N. Sun, X. N. Sun, Z. B. Tam, P. H. T. Tang, Z. B. Tian, W. W. Wang, B. D. Wang, C. Wang, H. Wang, H. G. Wang, J. C. Wang, J. S. Wang, L. P. Wang, L. Y. Wang, R. N. Wang, W. Wang, X. G. Wang, X. J. Wang, X. Y. Wang, Y. D. Wang, Y. J. Wang, Y. P. Wang, Z. Wang, Z. H. Wang, Z. X. Wei, D. M. Wei, J. J. Wei, Y. J. Wen, T. Wu, C. Y. Wu, H. R. Wu, S. Wu, W. X. Wu, X. F. Xi, S. Q. Xia, J. Xia, J. J. Xiang, G. M. Xiao, G. Xiao, H. B. Xin, G. G. Xin, Y. L. Xing, Y. Xu, D. L. Xu, R. X. Xue, L. Yan, D. H. Yang, C. W. Yang, F. F. Yang, J. Y. Yang, L. L. Yang, M. J. Yang, R. Z. Yang, S. B. Yao, Y. H. Yao, Z. G. Ye, Y. M. Yin, L. Q. Yin, N. You, X. H. You, Z. Y. Yu, Y. H. Yuan, Q. Zeng, H. D. Zeng, T. X. Zeng, W. Zeng, Z. K. Zha, M. Zhai, X. X. Zhang, B. B. Zhang, H. M. Zhang, H. Y. Zhang, J. L. Zhang, J. W. Zhang, L. Zhang, L. X. Zhang, P. F. Zhang, P. P. Zhang, R. Zhang, S. R. Zhang, S. S. Zhang, X. Zhang, X. P. Zhang, Y. Zhang, Y. F. Zhang, Y. L. Zhao, B. Zhao, J. Zhao, L. Zhao, L. Z. Zhao, S. P. Zheng, F. Zheng, Y. Zhou, B. Zhou, H. Zhou, J. N. Zhou, P. Zhou, R. Zhou, X. X. Zhu, C. G. Zhu, F. R. Zhu, H. Zhu, K. J. Zuo, X. Huang, X. Y.
Affiliation	Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophy, Beijing 100049, Peoples R China Chinese Acad Sci, Inst High Energy Phys, Expt Phys Div, Beijing 100049, Peoples R China Chinese Acad Sci, Inst High Energy Phys, Comp Ctr, Beijing 100049, Peoples R China Univ Chinese Acad Sci, Beijing 100049, Peoples R China TIANFU Cosm Ray Res Ctr, Chengdu 610000, Sichuan, Peoples R China State Key Lab Particle Detect & Elect, Beijing 100049, Peoples R China Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China Peking Univ, Sch Phys, Beijing 100871, Peoples R China Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082, Guangdong, Peoples R China Sun Yat Sen Univ, Sch Phys Guangzhou, Zhuhai 519082, Guangdong, Peoples R China Guangxi Univ, Sch Phys Sci & Technol, Nanning 530004, Guangxi, Peoples R China Hebei Normal Univ, Shijiazhuang 050024, Hebei, Peoples R China Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450001, Henan, Peoples R China Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Jiangsu, Peoples R China Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210023, Jiangsu, Peoples R China Shandong Univ, Inst Frontier & Interdisciplinary Sci, Qingdao 266237, Shandong, Peoples R China Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China Southwest Jiaotong Univ, Sch Phys Sci & Technol, Chengdu 610031, Sichuan, Peoples R China Southwest Jiaotong Univ, Sch Informat Sci & Technol, Chengdu 610031, Sichuan, Peoples R China Sichuan Univ, Coll Phys, Chengdu 610065, Sichuan, Peoples R China Tibet Univ, Minist Educ, Key Lab Cosm Rays, Lhasa 850000, Tibet, Peoples R China Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China Yunnan Univ, Sch Phys & Astron, Kunming 650091, Yunnan, Peoples R China Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland Max Planck Inst Nucl Phys, POB 103980, D-69029 Heidelberg, Germany Univ Napoli Federico II, Complesso Univ Monte St Angelo, Dipartimento Fis, Via Cinthia, I-80126 Naples, Italy Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia Moscow Inst Phys & Technol, Moscow 141700, Russia Univ Geneva, Fac Sci, Dept Phys Nucl & Corpusculaire, 24 Quai Ernest Ansermet, CH-1211 Geneva, Switzerland Mahidol Univ, Fac Sci, Dept Phys, Bangkok 10400, Thailand
Keywords	SLOW-DIFFUSION POSITRON FLUX WIND NEBULA SKY SURVEY CATALOG SPECTRUM PULSAR ELECTRONS PROPAGATION CONSTRAIN
Issue Date	16-Jun-2021
Publisher	PHYSICAL REVIEW LETTERS
Abstract	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 8.2 sigma for E > 25 TeV assuming a Gaussian template. The best-fit location is (right ascension, declination) = (95.47 degrees +/- 0.11 degrees, 37.92 degrees +/- 0.09 degrees), and the extension is 0.40 degrees +/- 0.07 degrees. The energy spectrum can be described by a power-law spectrum with an index of -2.92 +/- 0.17(st)(at) +/- 0.02(sys). No clear extended multiwavelength counterpart of the LHAASO source has been found from the radio to sub-TeV bands. The LHAASO observations arc 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 similar to 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.
URI	http://hdl.handle.net/20.500.11897/617996
ISSN	0031-9007
DOI	10.1103/PhysRevLett.126.241103
Indexed	SCI(E)
Appears in Collections:	物理学院

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