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Extended Very-High-Energy Gamma-Ray Emission Surrounding PSRJ0622+3749Observed by LHAASO-KM2A
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-06-16 , DOI: 10.1103/physrevlett.126.241103
F Aharonian 1, 2 , Q An 3, 4 , Axikegu 5 , L X Bai 6 , Y X Bai 7, 8 , Y W Bao 9 , D Bastieri 10 , X J Bi 7, 8, 11 , Y J Bi 7, 8 , H Cai 12 , J T Cai 10 , Z Cao 7, 8, 11 , Z Cao 3, 4 , J Chang 13 , J F Chang 3, 7, 8 , X C Chang 7, 8 , B M Chen 14 , J Chen 6 , L Chen 7, 8, 11 , L Chen 15 , L Chen 5 , M J Chen 7, 8 , M L Chen 3, 7, 8 , Q H Chen 5 , S H Chen 7, 8, 11 , S Z Chen 7, 8 , T L Chen 16 , X L Chen 7, 8, 11 , Y Chen 9 , N Cheng 7, 8 , Y D Cheng 7, 8 , S W Cui 14 , X H Cui 17 , Y D Cui 18 , B Z Dai 19 , H L Dai 3, 7, 8 , Z G Dai 9 , Danzengluobu 16 , D Della Volpe 20 , B D'Ettorre Piazzoli 21 , X J Dong 7, 8 , J H Fan 10 , Y Z Fan 13 , Z X Fan 7, 8 , J Fang 19 , K Fang 7, 8 , C F Feng 22 , L Feng 13 , S H Feng 7, 8 , Y L Feng 13 , B Gao 7, 8 , C D Gao 22 , Q Gao 16 , W Gao 22 , M M Ge 19 , L S Geng 7, 8 , G H Gong 23 , Q B Gou 7, 8 , M H Gu 3, 7, 8 , J G Guo 7, 8, 11 , X L Guo 5 , Y Q Guo 7, 8 , Y Y Guo 7, 8, 11, 13 , Y A Han 24 , H H He 7, 8, 11 , H N He 13 , J C He 7, 8, 11 , S L He 10 , X B He 18 , Y He 5 , M Heller 20 , Y K Hor 18 , C Hou 7, 8 , X Hou 25 , H B Hu 7, 8, 11 , S Hu 6 , S C Hu 7, 8, 11 , X J Hu 23 , D H Huang 5 , Q L Huang 7, 8 , W H Huang 22 , X T Huang 22 , Z C Huang 5 , F Ji 7, 8 , X L Ji 3, 7, 8 , H Y Jia 5 , K Jiang 3, 4 , Z J Jiang 19 , C Jin 7, 8, 11 , D Kuleshov 26 , K Levochkin 26 , B B Li 14 , C Li 7, 8 , C Li 3, 4 , F Li 3, 7, 8 , H B Li 7, 8 , H C Li 7, 8 , H Y Li 4, 13 , J Li 3, 7, 8 , K Li 7, 8 , W L Li 22 , X Li 3, 4 , X Li 5 , X R Li 7, 8 , Y Li 6 , Y Z Li 7, 8, 11 , Z Li 7, 8 , Z Li 27 , E W Liang 28 , Y F Liang 28 , S J Lin 18 , B Liu 4 , C Liu 7, 8 , D Liu 22 , H Liu 5 , H D Liu 24 , J Liu 7, 8 , J L Liu 29 , J S Liu 18 , J Y Liu 7, 8 , M Y Liu 16 , R Y Liu 9 , S M Liu 13 , W Liu 7, 8 , Y N Liu 23 , Z X Liu 6 , W J Long 5 , R Lu 19 , H K Lv 7, 8 , B Q Ma 27 , L L Ma 7, 8 , X H Ma 7, 8 , J R Mao 25 , A Masood 5 , W Mitthumsiri 30 , T Montaruli 20 , Y C Nan 22 , B Y Pang 5 , P Pattarakijwanich 30 , Z Y Pei 10 , M Y Qi 7, 8 , D Ruffolo 30 , V Rulev 26 , A Sáiz 30 , L Shao 14 , O Shchegolev 26, 31 , X D Sheng 7, 8 , J R Shi 7, 8 , H C Song 27 , Yu V Stenkin 26, 31 , V Stepanov 26 , Q N Sun 5 , X N Sun 28 , Z B Sun 32 , P H T Tam 18 , Z B Tang 3, 4 , W W Tian 11, 17 , B D Wang 7, 8 , C Wang 32 , H Wang 5 , H G Wang 10 , J C Wang 25 , J S Wang 29 , L P Wang 22 , L Y Wang 7, 8 , R N Wang 5 , W Wang 18 , W Wang 12 , X G Wang 28 , X J Wang 7, 8 , X Y Wang 9 , Y D Wang 7, 8 , Y J Wang 7, 8 , Y P Wang 7, 8, 11 , Z Wang 3, 7, 8 , Z Wang 29 , Z H Wang 6 , Z X Wang 19 , D M Wei 13 , J J Wei 13 , Y J Wei 7, 8, 11 , T Wen 19 , C Y Wu 7, 8 , H R Wu 7, 8 , S Wu 7, 8 , W X Wu 5 , X F Wu 13 , S Q Xi 5 , J Xia 4, 13 , J J Xia 5 , G M Xiang 11, 15 , G Xiao 7, 8 , H B Xiao 10 , G G Xin 12 , Y L Xin 5 , Y Xing 15 , D L Xu 29 , R X Xu 27 , L Xue 22 , D H Yan 25 , C W Yang 6 , F F Yang 3, 7, 8 , J Y Yang 18 , L L Yang 18 , M J Yang 7, 8 , R Z Yang 4 , S B Yang 19 , Y H Yao 6 , Z G Yao 7, 8 , Y M Ye 23 , L Q Yin 7, 8 , N Yin 22 , X H You 7, 8 , Z Y You 7, 8, 11 , Y H Yu 22 , Q Yuan 13 , H D Zeng 13 , T X Zeng 3, 7, 8 , W Zeng 19 , Z K Zeng 7, 8, 11 , M Zha 7, 8 , X X Zhai 7, 8 , B B Zhang 9 , H M Zhang 9 , H Y Zhang 22 , J L Zhang 17 , J W Zhang 6 , L Zhang 14 , L Zhang 19 , L X Zhang 10 , P F Zhang 19 , P P Zhang 14 , R Zhang 4, 13 , S R Zhang 14 , S S Zhang 7, 8 , X Zhang 9 , X P Zhang 7, 8 , Y Zhang 7, 8 , Y Zhang 7, 13 , Y F Zhang 5 , Y L Zhang 7, 8 , B Zhao 5 , J Zhao 7, 8 , L Zhao 3, 4 , L Z Zhao 14 , S P Zhao 13, 22 , F Zheng 32 , Y Zheng 5 , B Zhou 7, 8 , H Zhou 29 , J N Zhou 15 , P Zhou 9 , R Zhou 6 , X X Zhou 5 , C G Zhu 22 , F R Zhu 5 , H Zhu 17 , K J Zhu 3, 7, 8, 11 , X Zuo 7, 8 , X Y Huang 13 ,
Affiliation  

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>25TeV 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 160TeV, 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.

中文翻译:

LHAASO-KM2A 观测到 PSRJ0622+3749 周围的扩展超高能伽马射线发射

我们报告在中年 (207.8 kyr) 脉冲星 PSR 位置周围发现了一个扩展的超高能 (VHE) 伽马射线源 J0622+3749大型高空风淋天文台 (LHAASO)。检测到的源具有显着性8.2σ 为了 >25伏特假设一个高斯模板。最合适的位置是(赤经、赤纬)=(95.47°±0.11°,37.92°±0.09°),扩展名为 0.40°±0.07°. 能量谱可以用指数为的幂律谱来描述-2.92±0.17状态±0.02系统. 从无线电到子 TeV 波段,没有发现 LHAASO 源的明确扩展多波长对应物。LHAASO 观测结果与 VHE 电子从脉冲星逃逸,在星际介质中扩散,并散射星际辐射场的情景一致。如果将其解释为脉冲星晕情景,则为具有中值能量的电子推断出的扩散系数为160伏特, 与从 Geminga 和 Monogem 周围的扩展光晕获得的一致,并且比从宇宙射线二次星获得的要小得多。因此,LHAASO 对该源的发现可能丰富了所谓的脉冲星晕的类别,并证实了高能粒子通常在脉冲星周围的扰动介质中扩散非常缓慢。
更新日期:2021-06-16
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