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

Issued Date

2021-06-18

Resource Type

Article

ISSN

10797114
00319007

DOI

10.1103/PhysRevLett.126.241103

Other identifier(s)

2-s2.0-85108912273

Rights

Mahidol University

Rights Holder(s)

SCOPUS

Bibliographic Citation

Physical Review Letters. Vol.126, No.24 (2021)

Suggested Citation

F. Aharonian, Q. An, Axikegu, L. X. Bai, Y. X. Bai, Y. W. Bao, D. Bastieri, X. J. Bi, Y. J. Bi, H. Cai, J. T. Cai, Z. Cao, Z. Cao, J. Chang, J. F. Chang, X. C. Chang, B. M. Chen, J. Chen, L. Chen, L. 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. Chen, N. Cheng, Y. D. Cheng, S. W. Cui, X. H. Cui, Y. D. Cui, B. Z. Dai, H. L. Dai, Z. G. Dai, Danzengluobu, D. Della Volpe, B. D'Ettorre Piazzoli, X. J. Dong, J. H. Fan, Y. Z. Fan, Z. X. Fan, J. Fang, K. Fang, C. F. Feng, L. Feng, S. H. Feng, Y. L. Feng, B. Gao, C. D. Gao, Q. Gao, W. Gao, M. M. Ge, L. S. Geng, G. H. Gong, Q. B. Gou, M. H. Gu, J. G. Guo, X. L. Guo, Y. Q. Guo, Y. Y. Guo, Y. A. Han, H. H. He, H. N. He, J. C. He, S. L. He, X. B. He, Y. He, M. Heller, Y. K. Hor, C. Hou, X. Hou, H. B. Hu, S. Hu, S. C. Hu, X. J. Hu, D. H. Huang, Q. L. Huang, W. H. Huang, X. T. Huang, Z. C. Huang, F. Ji, X. L. Ji, H. Y. Jia, K. Jiang, Z. J. Jiang, C. Jin, D. Kuleshov, K. Levochkin, B. B. Li, C. Li, C. Li, F. Li, H. B. Li, H. C. Li, H. Y. Li, J. Li, K. Li Extended Very-High-Energy Gamma-Ray Emission Surrounding PSR J0622+3749 Observed by LHAASO-KM2A. Physical Review Letters. Vol.126, No.24 (2021). doi:10.1103/PhysRevLett.126.241103 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/78996

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Title

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

Author(s)

F. Aharonian
 Q. An
 Axikegu
 L. X. Bai
 Y. X. Bai
 Y. W. Bao
 D. Bastieri
 X. J. Bi
 Y. J. Bi
 H. Cai
 J. T. Cai
 Z. Cao
 Z. Cao
 J. Chang
 J. F. Chang
 X. C. Chang
 B. M. Chen
 J. Chen
 L. Chen
 L. 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. Chen
 N. Cheng
 Y. D. Cheng
 S. W. Cui
 X. H. Cui
 Y. D. Cui
 B. Z. Dai
 H. L. Dai
 Z. G. Dai
 Danzengluobu
 D. Della Volpe
 B. D'Ettorre Piazzoli
 X. J. Dong
 J. H. Fan
 Y. Z. Fan
 Z. X. Fan
 J. Fang
 K. Fang
 C. F. Feng
 L. Feng
 S. H. Feng
 Y. L. Feng
 B. Gao
 C. D. Gao
 Q. Gao
 W. Gao
 M. M. Ge
 L. S. Geng
 G. H. Gong
 Q. B. Gou
 M. H. Gu
 J. G. Guo
 X. L. Guo
 Y. Q. Guo
 Y. Y. Guo
 Y. A. Han
 H. H. He
 H. N. He
 J. C. He
 S. L. He
 X. B. He
 Y. He
 M. Heller
 Y. K. Hor
 C. Hou
 X. Hou
 H. B. Hu
 S. Hu
 S. C. Hu
 X. J. Hu
 D. H. Huang
 Q. L. Huang
 W. H. Huang
 X. T. Huang
 Z. C. Huang
 F. Ji
 X. L. Ji
 H. Y. Jia
 K. Jiang
 Z. J. Jiang
 C. Jin
 D. Kuleshov
 K. Levochkin
 B. B. Li
 C. Li
 C. Li
 F. Li
 H. B. Li
 H. C. Li
 H. Y. Li
 J. Li
 K. Li

Other Contributor(s)

State Key Laboratory of Particle Detection & Electronics
 Nanjing University
 Shanghai Astronomical Observatory Chinese Academy of Sciences
 Institute for Nuclear Research of the Russian Academy of Sciences
 Shandong University
 Wuhan University
 Yunnan University
 Institute of High Energy Physics Chinese Academy of Science
 University of Chinese Academy of Sciences
 Guangzhou University
 Tsinghua University
 Sun Yat-Sen University
 University of Science and Technology of China
 Zhengzhou University
 Dublin Institute for Advanced Studies
 Università degli Studi di Napoli Federico II
 Sichuan University
 National Astronomical Observatories Chinese Academy of Sciences
 Max-Planck-Institut für Kernphysik
 Southwest Jiaotong University
 Purple Mountain Observatory Chinese Academy of Sciences
 Université de Genève
 Hebei Normal University
 Tibet University
 TIANFU Cosmic Ray Research Center

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 8.2σ 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.

Keyword(s)

Physics and Astronomy

Availability

URI

https://repository.li.mahidol.ac.th/handle/20.500.14594/78996

Collections

Scopus 2021