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Auteurs principaux:	Cao, Zhen, Aharonian, Felix, Bai, Yunxiang, Bao, Yiwei, Bastieri, Denis, Bi, Xiaojun, Bi, YuJiang, WenYi, Mr Bian, Butkevich, A., Cai, Chengmiao, Cao, Wenyu, Cao, Zhe, Chang, Jin, Chang, Jinfan, Chen, Mr Aming, Chen, Ensheng, Chen, Mr Guo-Hai, Chen, Mr Huaxi, Chen, Liang, Chen, Long, Chen, Mingjun, Chen, Mali, Chen, Qihui, Chen, Shi, Chen, Suhong, Chen, Songzhan, Chen, Tianlu, Chen, Xiaobin, Chen, Xuejian, Chen, Yang, Cheng, Ning, Cheng, Yaodong, Chu, Ming Chung, Cui, Mingyang, Cui, Shuwang, Cui, Xiaohong, Cui, Yidong, Dai, Benzhong, Dai, Hongliang, Dai, Z. G., ., Danzengluobu, Diao, Yangxuan, Dong, Xuqiang, Duan, Kaikai, Fan, Junhui, Fan, Yi-Zhong, Fang, Jun, Fang, Jianhua, Fang, Kun, Feng, Cunfeng, Feng, Hua, Feng, Li, Feng, Shaohui, Feng, Xiaoting, Feng, Yi, Feng, Youliang, Gabici, Stefano, Gao, Bo, Gao, Chuandong, Gao, Qi, Gao, Wei, Gao, Weikang, Ge, Maomao, Ge, Ting-Ting, Geng, Lisi, Giacinti, Gwenael, Gong, Guanghua, Gou, Quanbu, Gu, Minhao, Guo, Fulai, Guo, Jing, Guo, Xiaolei, Guo, Yiqing, Guo, Yingying, Han, Yiang, Hannuksela, Otto A., Hasan, Mariam, He, Huihai, He, Hao-Ning, He, Jiayin, He, Xinyu, He, Yu, Hernández-Cadena, Sergio, Hou, Bowen, Hou, Chao, Hou, Xian, Hu, Hongbo, Hu, Shicong, Huang, Chen, Huang, Daihui, Huang, Jiajun, Huang, Tian-Qi, Huang, Wenjun, Huang, Xingtao, Huang, Xiaoyuan, Huang, Yong, Huang, Yi-Yun, Ji, Xiaolu, Jia, Huanyu, Jia, Kang, Jiang, Houbing, Jiang, Kun, Jiang, Xiaowei, Jiang, Zejun, Jin, Min, Kaci, Samy, Kang, Mingming, Karpikov, Ivan, Khangulyan, Dmitry, Kuleshov, Denis, Kurinov, Kirill, Li, Bingbing, Li, Cheng, Li, Mr Cong, Li, Dan, Li, Fei, Li, Haibo, Li, Huicai, Li, Jian, Li, Jie, Li, Kai, Li, Long, Li, Rong-Lan, Li, Sidai, Li, Tianyang, Li, Wenlian, Li, Xiurong, Li, Xin, Li, Yizhuo, Li, Yuan, Li, Zhe, Li, Zhuo, Liang, Enwei, Liang, Yunfeng, Lin, Su-Jie, Liu, Bing, Liu, Cheng, Liu, Dong, Liu, Dangbo, Liu, Hu, Liu, Haidong, Liu, Jia, Liu, Jiali, Liu, Jiren, Liu, Maoyuan, Liu, Ruo-Yu, Liu, Siming, Liu, Wei, Liu, Xi, Liu, Mr Yi, Liu, Yu, Liu, Yinong, Lou, Yu-Qing, Luo, Qing, Luo, Yu, Lv, Hongkui, Ma, Bo-Qiang, Ma, Lingling, Ma, Xinhua, Mao, Jirong, Min, Zhen, Mitthumsiri, Warit, Mou, Guobin, Mu, Huijun, Neronov, Andrii, Ng, Kenny Chun Yu, Ni, Mingyang, Nie, Lin, Ou, Mr Lejian, anich, Petchara Pattarakijw, Pei, Zhiyuan, Qi, Jincan, Qi, Mengyao, Qin, Jiajun, Raza, Ali, Ren, Chongyang, Ruffolo, David, Sáiz, Alejandro, Semikoz, Dmitri, Shao, Lang, Shchegolev, Oleg, Shen, Yunzhi, Sheng, Xiangdong, Shi, Zhaodong, Shu, Fuwen, Song, Huichao, Stepanov, Vladimir Stepanov, Su, Yang, Sun, Dongxu, Sun, Hao, Sun, Qinning, Sun, Xiaona, Sun, Zhibin, Tabasam, Mr Nabeel, Takata, Jumpei, Tam, P. H. T., Tan, Honbin, Tang, Qingwen, Tang, Ruiyi, Tang, Zebo, Tian, Wenwu, Tong, Chaonan, Wan, Li-Hong, Wang, Chao, Wang, Guangwei, Wang, Hongguang, Wang, Jiancheng, Wang, Ke, Wang, Kai, Wang, Liping, Wang, Lingyu, Wang, Luyao, Wang, Ran, Wang, Wei, Wang, Xianggao, Wang, Xinjian, Wang, Xiang-Yu, Wang, Yang, Wang, Yudong, Wang, Zhonghai, Wang, Zhongxiang, Wang, Zheng, Wei, Daming, Wei, Jun-Jie, Wei, Yongjian, Wen, Tao, Weng, Shan-Shan, Wu, Chaoyong, Wu, Hanrong, Wu, Qingwen, Wu, Sha, Wu, Xue-Feng, Wu, Yusheng, Xi, Shaoqiang, Xia, Jie, Xia, Junji, Xiang, Guangman, Xiao, Dixuan, Xiao, Gang, Xin, Yuliang, Xing, Yi, Xiong, Dingrong, Xiong, Zheng, Xu, Donglian, Xu, Renfeng, Xu, Renxin, Xu, Weili, Xue, Liang, Yan, Dahai, Yan, Tian, Yang, Chaowen, Yang, Chuyuan, Yang, Fengfan, Yang, Lili, Yang, Mingjie, Yang, Ruizhi, Yang, Ms Wen-xin, Yang, Zihan, Yao, Zhiguo, Ye, Xuanang, Yin, Liqiao, Yin, Na, You, Xiaohao, You, Zhiyong, Yuan, Qiang, Yue, Hua, Zeng, Houdun, Zeng, Tingxuan, Zeng, Wei, Zeng, Xiangtao, Zha, Min, Zhang, Binbin, Zhang, Bing, Zhang, Chao, Zhang, Feng, Zhang, Hongfei, Zhang, Haiming, Zhang, Hengying, Zhang, Jianli, Zhang, Li, Zhang, Pengfei, Zhang, Peipei, Zhang, Rui, Zhang, Shaoru, Zhang, Shoushan, Zhang, Weiyan, Zhang, Xiao, Zhang, Xiaopeng, Zhang, Yi, Zhang, Yong, Zhang, Zhipeng, Zhao, Jing, Zhao, Lei, Zhao, Lizhi, Zhao, Shiping, Zhao, Xiao-Hong, Zhao, Zihao, Zheng, Fu, Zhong, Wenjuan, Zhou, Bin, Zhou, Hao, Zhou, Jianeng, Zhou, Meng, Zhou, Ping, Zhou, Rong, Zhou, Xiaoxi, Zhou, Xunxiu, Zhu, Ben-Yang, Zhu, Chengguang, Zhu, Fengrong, Zhu, Hui, Zhu, Kejun, Zou, Yuan-chuan, Zuo, Xiong, Macias, Oscar
Format:	Preprint
Publié:	2025
Sujets:	High Energy Astrophysical Phenomena
Accès en ligne:	https://arxiv.org/abs/2510.06786
Tags:	Ajouter un tag Pas de tags, Soyez le premier à ajouter un tag!

_version_	1866909869339049984
author	Cao, Zhen Aharonian, Felix Bai, Yunxiang Bao, Yiwei Bastieri, Denis Bi, Xiaojun Bi, YuJiang WenYi, Mr Bian Butkevich, A. Cai, Chengmiao Cao, Wenyu Cao, Zhe Chang, Jin Chang, Jinfan Chen, Mr Aming Chen, Ensheng Chen, Mr Guo-Hai Chen, Mr Huaxi Chen, Liang Chen, Long Chen, Mingjun Chen, Mali Chen, Qihui Chen, Shi Chen, Suhong Chen, Songzhan Chen, Tianlu Chen, Xiaobin Chen, Xuejian Chen, Yang Cheng, Ning Cheng, Yaodong Chu, Ming Chung Cui, Mingyang Cui, Shuwang Cui, Xiaohong Cui, Yidong Dai, Benzhong Dai, Hongliang Dai, Z. G. ., Danzengluobu Diao, Yangxuan Dong, Xuqiang Duan, Kaikai Fan, Junhui Fan, Yi-Zhong Fang, Jun Fang, Jianhua Fang, Kun Feng, Cunfeng Feng, Hua Feng, Li Feng, Shaohui Feng, Xiaoting Feng, Yi Feng, Youliang Gabici, Stefano Gao, Bo Gao, Chuandong Gao, Qi Gao, Wei Gao, Weikang Ge, Maomao Ge, Ting-Ting Geng, Lisi Giacinti, Gwenael Gong, Guanghua Gou, Quanbu Gu, Minhao Guo, Fulai Guo, Jing Guo, Xiaolei Guo, Yiqing Guo, Yingying Han, Yiang Hannuksela, Otto A. Hasan, Mariam He, Huihai He, Hao-Ning He, Jiayin He, Xinyu He, Yu Hernández-Cadena, Sergio Hou, Bowen Hou, Chao Hou, Xian Hu, Hongbo Hu, Shicong Huang, Chen Huang, Daihui Huang, Jiajun Huang, Tian-Qi Huang, Wenjun Huang, Xingtao Huang, Xiaoyuan Huang, Yong Huang, Yi-Yun Ji, Xiaolu Jia, Huanyu Jia, Kang Jiang, Houbing Jiang, Kun Jiang, Xiaowei Jiang, Zejun Jin, Min Kaci, Samy Kang, Mingming Karpikov, Ivan Khangulyan, Dmitry Kuleshov, Denis Kurinov, Kirill Li, Bingbing Li, Cheng Li, Mr Cong Li, Dan Li, Fei Li, Haibo Li, Huicai Li, Jian Li, Jie Li, Kai Li, Long Li, Rong-Lan Li, Sidai Li, Tianyang Li, Wenlian Li, Xiurong Li, Xin Li, Yizhuo Li, Yuan Li, Zhe Li, Zhuo Liang, Enwei Liang, Yunfeng Lin, Su-Jie Liu, Bing Liu, Cheng Liu, Dong Liu, Dangbo Liu, Hu Liu, Haidong Liu, Jia Liu, Jiali Liu, Jiren Liu, Maoyuan Liu, Ruo-Yu Liu, Siming Liu, Wei Liu, Xi Liu, Mr Yi Liu, Yu Liu, Yinong Lou, Yu-Qing Luo, Qing Luo, Yu Lv, Hongkui Ma, Bo-Qiang Ma, Lingling Ma, Xinhua Mao, Jirong Min, Zhen Mitthumsiri, Warit Mou, Guobin Mu, Huijun Neronov, Andrii Ng, Kenny Chun Yu Ni, Mingyang Nie, Lin Ou, Mr Lejian anich, Petchara Pattarakijw Pei, Zhiyuan Qi, Jincan Qi, Mengyao Qin, Jiajun Raza, Ali Ren, Chongyang Ruffolo, David Sáiz, Alejandro Semikoz, Dmitri Shao, Lang Shchegolev, Oleg Shen, Yunzhi Sheng, Xiangdong Shi, Zhaodong Shu, Fuwen Song, Huichao Stepanov, Vladimir Stepanov Su, Yang Sun, Dongxu Sun, Hao Sun, Qinning Sun, Xiaona Sun, Zhibin Tabasam, Mr Nabeel Takata, Jumpei Tam, P. H. T. Tan, Honbin Tang, Qingwen Tang, Ruiyi Tang, Zebo Tian, Wenwu Tong, Chaonan Wan, Li-Hong Wang, Chao Wang, Guangwei Wang, Hongguang Wang, Jiancheng Wang, Ke Wang, Kai Wang, Kai Wang, Liping Wang, Lingyu Wang, Luyao Wang, Ran Wang, Wei Wang, Xianggao Wang, Xinjian Wang, Xiang-Yu Wang, Yang Wang, Yudong Wang, Zhonghai Wang, Zhongxiang Wang, Zheng Wei, Daming Wei, Jun-Jie Wei, Yongjian Wen, Tao Weng, Shan-Shan Wu, Chaoyong Wu, Hanrong Wu, Qingwen Wu, Sha Wu, Xue-Feng Wu, Yusheng Xi, Shaoqiang Xia, Jie Xia, Junji Xiang, Guangman Xiao, Dixuan Xiao, Gang Xin, Yuliang Xing, Yi Xiong, Dingrong Xiong, Zheng Xu, Donglian Xu, Renfeng Xu, Renxin Xu, Weili Xue, Liang Yan, Dahai Yan, Tian Yang, Chaowen Yang, Chuyuan Yang, Fengfan Yang, Lili Yang, Mingjie Yang, Ruizhi Yang, Ms Wen-xin Yang, Zihan Yao, Zhiguo Ye, Xuanang Yin, Liqiao Yin, Na You, Xiaohao You, Zhiyong Yuan, Qiang Yue, Hua Zeng, Houdun Zeng, Tingxuan Zeng, Wei Zeng, Xiangtao Zha, Min Zhang, Binbin Zhang, Bing Zhang, Chao Zhang, Feng Zhang, Hongfei Zhang, Haiming Zhang, Hengying Zhang, Jianli Zhang, Li Zhang, Pengfei Zhang, Peipei Zhang, Rui Zhang, Shaoru Zhang, Shoushan Zhang, Weiyan Zhang, Xiao Zhang, Xiaopeng Zhang, Yi Zhang, Yong Zhang, Zhipeng Zhao, Jing Zhao, Lei Zhao, Lizhi Zhao, Shiping Zhao, Xiao-Hong Zhao, Zihao Zheng, Fu Zhong, Wenjuan Zhou, Bin Zhou, Hao Zhou, Jianeng Zhou, Meng Zhou, Ping Zhou, Rong Zhou, Xiaoxi Zhou, Xunxiu Zhu, Ben-Yang Zhu, Chengguang Zhu, Fengrong Zhu, Hui Zhu, Kejun Zou, Yuan-chuan Zuo, Xiong Macias, Oscar
author_facet	Cao, Zhen Aharonian, Felix Bai, Yunxiang Bao, Yiwei Bastieri, Denis Bi, Xiaojun Bi, YuJiang WenYi, Mr Bian Butkevich, A. Cai, Chengmiao Cao, Wenyu Cao, Zhe Chang, Jin Chang, Jinfan Chen, Mr Aming Chen, Ensheng Chen, Mr Guo-Hai Chen, Mr Huaxi Chen, Liang Chen, Long Chen, Mingjun Chen, Mali Chen, Qihui Chen, Shi Chen, Suhong Chen, Songzhan Chen, Tianlu Chen, Xiaobin Chen, Xuejian Chen, Yang Cheng, Ning Cheng, Yaodong Chu, Ming Chung Cui, Mingyang Cui, Shuwang Cui, Xiaohong Cui, Yidong Dai, Benzhong Dai, Hongliang Dai, Z. G. ., Danzengluobu Diao, Yangxuan Dong, Xuqiang Duan, Kaikai Fan, Junhui Fan, Yi-Zhong Fang, Jun Fang, Jianhua Fang, Kun Feng, Cunfeng Feng, Hua Feng, Li Feng, Shaohui Feng, Xiaoting Feng, Yi Feng, Youliang Gabici, Stefano Gao, Bo Gao, Chuandong Gao, Qi Gao, Wei Gao, Weikang Ge, Maomao Ge, Ting-Ting Geng, Lisi Giacinti, Gwenael Gong, Guanghua Gou, Quanbu Gu, Minhao Guo, Fulai Guo, Jing Guo, Xiaolei Guo, Yiqing Guo, Yingying Han, Yiang Hannuksela, Otto A. Hasan, Mariam He, Huihai He, Hao-Ning He, Jiayin He, Xinyu He, Yu Hernández-Cadena, Sergio Hou, Bowen Hou, Chao Hou, Xian Hu, Hongbo Hu, Shicong Huang, Chen Huang, Daihui Huang, Jiajun Huang, Tian-Qi Huang, Wenjun Huang, Xingtao Huang, Xiaoyuan Huang, Yong Huang, Yi-Yun Ji, Xiaolu Jia, Huanyu Jia, Kang Jiang, Houbing Jiang, Kun Jiang, Xiaowei Jiang, Zejun Jin, Min Kaci, Samy Kang, Mingming Karpikov, Ivan Khangulyan, Dmitry Kuleshov, Denis Kurinov, Kirill Li, Bingbing Li, Cheng Li, Mr Cong Li, Dan Li, Fei Li, Haibo Li, Huicai Li, Jian Li, Jie Li, Kai Li, Long Li, Rong-Lan Li, Sidai Li, Tianyang Li, Wenlian Li, Xiurong Li, Xin Li, Yizhuo Li, Yuan Li, Zhe Li, Zhuo Liang, Enwei Liang, Yunfeng Lin, Su-Jie Liu, Bing Liu, Cheng Liu, Dong Liu, Dangbo Liu, Hu Liu, Haidong Liu, Jia Liu, Jiali Liu, Jiren Liu, Maoyuan Liu, Ruo-Yu Liu, Siming Liu, Wei Liu, Xi Liu, Mr Yi Liu, Yu Liu, Yinong Lou, Yu-Qing Luo, Qing Luo, Yu Lv, Hongkui Ma, Bo-Qiang Ma, Lingling Ma, Xinhua Mao, Jirong Min, Zhen Mitthumsiri, Warit Mou, Guobin Mu, Huijun Neronov, Andrii Ng, Kenny Chun Yu Ni, Mingyang Nie, Lin Ou, Mr Lejian anich, Petchara Pattarakijw Pei, Zhiyuan Qi, Jincan Qi, Mengyao Qin, Jiajun Raza, Ali Ren, Chongyang Ruffolo, David Sáiz, Alejandro Semikoz, Dmitri Shao, Lang Shchegolev, Oleg Shen, Yunzhi Sheng, Xiangdong Shi, Zhaodong Shu, Fuwen Song, Huichao Stepanov, Vladimir Stepanov Su, Yang Sun, Dongxu Sun, Hao Sun, Qinning Sun, Xiaona Sun, Zhibin Tabasam, Mr Nabeel Takata, Jumpei Tam, P. H. T. Tan, Honbin Tang, Qingwen Tang, Ruiyi Tang, Zebo Tian, Wenwu Tong, Chaonan Wan, Li-Hong Wang, Chao Wang, Guangwei Wang, Hongguang Wang, Jiancheng Wang, Ke Wang, Kai Wang, Kai Wang, Liping Wang, Lingyu Wang, Luyao Wang, Ran Wang, Wei Wang, Xianggao Wang, Xinjian Wang, Xiang-Yu Wang, Yang Wang, Yudong Wang, Zhonghai Wang, Zhongxiang Wang, Zheng Wei, Daming Wei, Jun-Jie Wei, Yongjian Wen, Tao Weng, Shan-Shan Wu, Chaoyong Wu, Hanrong Wu, Qingwen Wu, Sha Wu, Xue-Feng Wu, Yusheng Xi, Shaoqiang Xia, Jie Xia, Junji Xiang, Guangman Xiao, Dixuan Xiao, Gang Xin, Yuliang Xing, Yi Xiong, Dingrong Xiong, Zheng Xu, Donglian Xu, Renfeng Xu, Renxin Xu, Weili Xue, Liang Yan, Dahai Yan, Tian Yang, Chaowen Yang, Chuyuan Yang, Fengfan Yang, Lili Yang, Mingjie Yang, Ruizhi Yang, Ms Wen-xin Yang, Zihan Yao, Zhiguo Ye, Xuanang Yin, Liqiao Yin, Na You, Xiaohao You, Zhiyong Yuan, Qiang Yue, Hua Zeng, Houdun Zeng, Tingxuan Zeng, Wei Zeng, Xiangtao Zha, Min Zhang, Binbin Zhang, Bing Zhang, Chao Zhang, Feng Zhang, Hongfei Zhang, Haiming Zhang, Hengying Zhang, Jianli Zhang, Li Zhang, Pengfei Zhang, Peipei Zhang, Rui Zhang, Shaoru Zhang, Shoushan Zhang, Weiyan Zhang, Xiao Zhang, Xiaopeng Zhang, Yi Zhang, Yong Zhang, Zhipeng Zhao, Jing Zhao, Lei Zhao, Lizhi Zhao, Shiping Zhao, Xiao-Hong Zhao, Zihao Zheng, Fu Zhong, Wenjuan Zhou, Bin Zhou, Hao Zhou, Jianeng Zhou, Meng Zhou, Ping Zhou, Rong Zhou, Xiaoxi Zhou, Xunxiu Zhu, Ben-Yang Zhu, Chengguang Zhu, Fengrong Zhu, Hui Zhu, Kejun Zou, Yuan-chuan Zuo, Xiong Macias, Oscar
contents	Ultra-high-energy (UHE), exceeding 100 TeV (10^12 electronvolts), γ-rays manifests extreme particle acceleration in astrophysical sources. Recent observations by γ-ray telescopes, particularly by the Large High Altitude Air Shower Observatory (LHAASO), have revealed a few tens of UHE sources, indicating numerous Galactic sources capable of accelerating particles to PeV (10^15 electronvolts) energies. However, discerning the dominant acceleration mechanisms (leptonic versus hadronic), the relative contributions of specific source classes, and the role of particle transport in shaping their observed emission are central goals of modern UHE astrophysics. Here we report the discovery of a giant UHE γ-ray emitter at -17.5° off the Galactic plane - a region where UHE γ-ray sources are rarely found. The emitter exhibits a distinctive asymmetric shape, resembling a giant "Peanut" spanning 0.45° \times 4.6°, indicative of anisotropic particle distribution over a large area. A highly aged millisecond pulsar (MSP) J0218+4232 is the sole candidate accelerator positionally coincident with the Peanut region. Its association with UHE γ-rays extending to 0.7 PeV, if confirmed, would provide the first evidence of a millisecond pulsar powering PeV particles. Such a finding challenges prevailing models, which posit that millisecond pulsars cannot sustain acceleration to PeV energies. The detection reveals fundamental gaps in understanding particle acceleration, cosmic-ray transport, and interstellar magnetic field effects, potentially revealing new PeV accelerator (PeVatron) classes.
format	Preprint
id	arxiv_https___arxiv_org_abs_2510_06786
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	A Giant Peanut-shaped Ultra-High-Energy Gamma-Ray Emitter Off the Galactic Plane Cao, Zhen Aharonian, Felix Bai, Yunxiang Bao, Yiwei Bastieri, Denis Bi, Xiaojun Bi, YuJiang WenYi, Mr Bian Butkevich, A. Cai, Chengmiao Cao, Wenyu Cao, Zhe Chang, Jin Chang, Jinfan Chen, Mr Aming Chen, Ensheng Chen, Mr Guo-Hai Chen, Mr Huaxi Chen, Liang Chen, Long Chen, Mingjun Chen, Mali Chen, Qihui Chen, Shi Chen, Suhong Chen, Songzhan Chen, Tianlu Chen, Xiaobin Chen, Xuejian Chen, Yang Cheng, Ning Cheng, Yaodong Chu, Ming Chung Cui, Mingyang Cui, Shuwang Cui, Xiaohong Cui, Yidong Dai, Benzhong Dai, Hongliang Dai, Z. G. ., Danzengluobu Diao, Yangxuan Dong, Xuqiang Duan, Kaikai Fan, Junhui Fan, Yi-Zhong Fang, Jun Fang, Jianhua Fang, Kun Feng, Cunfeng Feng, Hua Feng, Li Feng, Shaohui Feng, Xiaoting Feng, Yi Feng, Youliang Gabici, Stefano Gao, Bo Gao, Chuandong Gao, Qi Gao, Wei Gao, Weikang Ge, Maomao Ge, Ting-Ting Geng, Lisi Giacinti, Gwenael Gong, Guanghua Gou, Quanbu Gu, Minhao Guo, Fulai Guo, Jing Guo, Xiaolei Guo, Yiqing Guo, Yingying Han, Yiang Hannuksela, Otto A. Hasan, Mariam He, Huihai He, Hao-Ning He, Jiayin He, Xinyu He, Yu Hernández-Cadena, Sergio Hou, Bowen Hou, Chao Hou, Xian Hu, Hongbo Hu, Shicong Huang, Chen Huang, Daihui Huang, Jiajun Huang, Tian-Qi Huang, Wenjun Huang, Xingtao Huang, Xiaoyuan Huang, Yong Huang, Yi-Yun Ji, Xiaolu Jia, Huanyu Jia, Kang Jiang, Houbing Jiang, Kun Jiang, Xiaowei Jiang, Zejun Jin, Min Kaci, Samy Kang, Mingming Karpikov, Ivan Khangulyan, Dmitry Kuleshov, Denis Kurinov, Kirill Li, Bingbing Li, Cheng Li, Mr Cong Li, Dan Li, Fei Li, Haibo Li, Huicai Li, Jian Li, Jie Li, Kai Li, Long Li, Rong-Lan Li, Sidai Li, Tianyang Li, Wenlian Li, Xiurong Li, Xin Li, Yizhuo Li, Yuan Li, Zhe Li, Zhuo Liang, Enwei Liang, Yunfeng Lin, Su-Jie Liu, Bing Liu, Cheng Liu, Dong Liu, Dangbo Liu, Hu Liu, Haidong Liu, Jia Liu, Jiali Liu, Jiren Liu, Maoyuan Liu, Ruo-Yu Liu, Siming Liu, Wei Liu, Xi Liu, Mr Yi Liu, Yu Liu, Yinong Lou, Yu-Qing Luo, Qing Luo, Yu Lv, Hongkui Ma, Bo-Qiang Ma, Lingling Ma, Xinhua Mao, Jirong Min, Zhen Mitthumsiri, Warit Mou, Guobin Mu, Huijun Neronov, Andrii Ng, Kenny Chun Yu Ni, Mingyang Nie, Lin Ou, Mr Lejian anich, Petchara Pattarakijw Pei, Zhiyuan Qi, Jincan Qi, Mengyao Qin, Jiajun Raza, Ali Ren, Chongyang Ruffolo, David Sáiz, Alejandro Semikoz, Dmitri Shao, Lang Shchegolev, Oleg Shen, Yunzhi Sheng, Xiangdong Shi, Zhaodong Shu, Fuwen Song, Huichao Stepanov, Vladimir Stepanov Su, Yang Sun, Dongxu Sun, Hao Sun, Qinning Sun, Xiaona Sun, Zhibin Tabasam, Mr Nabeel Takata, Jumpei Tam, P. H. T. Tan, Honbin Tang, Qingwen Tang, Ruiyi Tang, Zebo Tian, Wenwu Tong, Chaonan Wan, Li-Hong Wang, Chao Wang, Guangwei Wang, Hongguang Wang, Jiancheng Wang, Ke Wang, Kai Wang, Kai Wang, Liping Wang, Lingyu Wang, Luyao Wang, Ran Wang, Wei Wang, Xianggao Wang, Xinjian Wang, Xiang-Yu Wang, Yang Wang, Yudong Wang, Zhonghai Wang, Zhongxiang Wang, Zheng Wei, Daming Wei, Jun-Jie Wei, Yongjian Wen, Tao Weng, Shan-Shan Wu, Chaoyong Wu, Hanrong Wu, Qingwen Wu, Sha Wu, Xue-Feng Wu, Yusheng Xi, Shaoqiang Xia, Jie Xia, Junji Xiang, Guangman Xiao, Dixuan Xiao, Gang Xin, Yuliang Xing, Yi Xiong, Dingrong Xiong, Zheng Xu, Donglian Xu, Renfeng Xu, Renxin Xu, Weili Xue, Liang Yan, Dahai Yan, Tian Yang, Chaowen Yang, Chuyuan Yang, Fengfan Yang, Lili Yang, Mingjie Yang, Ruizhi Yang, Ms Wen-xin Yang, Zihan Yao, Zhiguo Ye, Xuanang Yin, Liqiao Yin, Na You, Xiaohao You, Zhiyong Yuan, Qiang Yue, Hua Zeng, Houdun Zeng, Tingxuan Zeng, Wei Zeng, Xiangtao Zha, Min Zhang, Binbin Zhang, Bing Zhang, Chao Zhang, Feng Zhang, Hongfei Zhang, Haiming Zhang, Hengying Zhang, Jianli Zhang, Li Zhang, Pengfei Zhang, Peipei Zhang, Rui Zhang, Shaoru Zhang, Shoushan Zhang, Weiyan Zhang, Xiao Zhang, Xiaopeng Zhang, Yi Zhang, Yong Zhang, Zhipeng Zhao, Jing Zhao, Lei Zhao, Lizhi Zhao, Shiping Zhao, Xiao-Hong Zhao, Zihao Zheng, Fu Zhong, Wenjuan Zhou, Bin Zhou, Hao Zhou, Jianeng Zhou, Meng Zhou, Ping Zhou, Rong Zhou, Xiaoxi Zhou, Xunxiu Zhu, Ben-Yang Zhu, Chengguang Zhu, Fengrong Zhu, Hui Zhu, Kejun Zou, Yuan-chuan Zuo, Xiong Macias, Oscar High Energy Astrophysical Phenomena Ultra-high-energy (UHE), exceeding 100 TeV (10^12 electronvolts), γ-rays manifests extreme particle acceleration in astrophysical sources. Recent observations by γ-ray telescopes, particularly by the Large High Altitude Air Shower Observatory (LHAASO), have revealed a few tens of UHE sources, indicating numerous Galactic sources capable of accelerating particles to PeV (10^15 electronvolts) energies. However, discerning the dominant acceleration mechanisms (leptonic versus hadronic), the relative contributions of specific source classes, and the role of particle transport in shaping their observed emission are central goals of modern UHE astrophysics. Here we report the discovery of a giant UHE γ-ray emitter at -17.5° off the Galactic plane - a region where UHE γ-ray sources are rarely found. The emitter exhibits a distinctive asymmetric shape, resembling a giant "Peanut" spanning 0.45° \times 4.6°, indicative of anisotropic particle distribution over a large area. A highly aged millisecond pulsar (MSP) J0218+4232 is the sole candidate accelerator positionally coincident with the Peanut region. Its association with UHE γ-rays extending to 0.7 PeV, if confirmed, would provide the first evidence of a millisecond pulsar powering PeV particles. Such a finding challenges prevailing models, which posit that millisecond pulsars cannot sustain acceleration to PeV energies. The detection reveals fundamental gaps in understanding particle acceleration, cosmic-ray transport, and interstellar magnetic field effects, potentially revealing new PeV accelerator (PeVatron) classes.
title	A Giant Peanut-shaped Ultra-High-Energy Gamma-Ray Emitter Off the Galactic Plane
topic	High Energy Astrophysical Phenomena
url	https://arxiv.org/abs/2510.06786

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