Related papers: Evidence that Ultra-High-Energy Gamma Rays are a U…

Establishing a connection between high-power pulsars and very-high-energy gamma-ray sources

In the very-high-energy (VHE) gamma-ray wave band, pulsar wind nebulae (PWNe) represent to date the most populous class of Galactic sources. Nevertheless, the details of the energy conversion mechanisms in the vicinity of pulsars are not…

Astrophysics · Physics 2019-08-14 S. Carrigan , J. A. Hinton , W. Hofmann , K. Kosack , T. Lohse , O. Reimer

Searching for Very High Energy Emission from Pulsars Using the High Altitude Water Cherenkov (HAWC) Observatory

There are currently over 160 known gamma-ray pulsars. While most of them are detected only from space, at least two are now seen also from the ground. MAGIC and VERITAS have measured the gamma ray pulsed emission of the Crab pulsar up to…

High Energy Astrophysical Phenomena · Physics 2019-08-13 C. Alvarez Ochoa , P. M. Saz Parkinson , A. Belfiore , A. Carramiñana , C. Rivière , E. Moreno Barbosa

A Giant Peanut-shaped Ultra-High-Energy Gamma-Ray Emitter Off the Galactic Plane

Ultra-high-energy (UHE), exceeding 100 TeV (10^12 electronvolts), {\gamma}-rays manifests extreme particle acceleration in astrophysical sources. Recent observations by {\gamma}-ray telescopes, particularly by the Large High Altitude Air…

High Energy Astrophysical Phenomena · Physics 2025-10-28 Zhen Cao , Felix Aharonian , Yunxiang Bai , Yiwei Bao , Denis Bastieri , Xiaojun Bi , YuJiang Bi , Mr Bian WenYi , A. Butkevich , Chengmiao Cai , Wenyu Cao , Zhe Cao , Jin Chang , Jinfan Chang , 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 Chen , Ning Cheng , Yaodong Cheng , Ming Chung Chu , Mingyang Cui , Shuwang Cui , Xiaohong Cui , Yidong Cui , Benzhong Dai , Hongliang Dai , Z. G. Dai , Danzengluobu . , Yangxuan Diao , Xuqiang Dong , Kaikai Duan , Junhui Fan , Yi-Zhong Fan , Jun Fang , Jianhua Fang , Kun Fang , Cunfeng Feng , Hua Feng , Li Feng , Shaohui Feng , Xiaoting Feng , Yi Feng , Youliang Feng , Stefano Gabici , Bo Gao , Chuandong Gao , Qi Gao , Wei Gao , Weikang Gao , Maomao Ge , Ting-Ting Ge , Lisi Geng , Gwenael Giacinti , Guanghua Gong , Quanbu Gou , Minhao Gu , Fulai Guo , Jing Guo , Xiaolei Guo , Yiqing Guo , Yingying Guo , Yiang Han , Otto A. Hannuksela , Mariam Hasan , Huihai He , Hao-Ning He , Jiayin He , Xinyu He , Yu He , Sergio Hernández-Cadena , Bowen Hou , Chao Hou , Xian Hou , Hongbo Hu , Shicong Hu , Chen Huang , Daihui Huang , Jiajun Huang , Tian-Qi Huang , Wenjun Huang , Xingtao Huang , Xiaoyuan Huang , Yong Huang , Yi-Yun Huang , Xiaolu Ji , Huanyu Jia , Kang Jia , Houbing Jiang , Kun Jiang , Xiaowei Jiang , Zejun Jiang , Min Jin , Samy Kaci , Mingming Kang , Ivan Karpikov , Dmitry Khangulyan , Denis Kuleshov , Kirill Kurinov , 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 Li , Enwei Liang , Yunfeng Liang , Su-Jie Lin , 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 Liu , Yu-Qing Lou , Qing Luo , Yu Luo , Hongkui Lv , Bo-Qiang Ma , Lingling Ma , Xinhua Ma , Jirong Mao , Zhen Min , Warit Mitthumsiri , Guobin Mou , Huijun Mu , Andrii Neronov , Kenny Chun Yu Ng , Mingyang Ni , Lin Nie , Mr Lejian Ou , Petchara Pattarakijw anich , Zhiyuan Pei , Jincan Qi , Mengyao Qi , Jiajun Qin , Ali Raza , Chongyang Ren , David Ruffolo , Alejandro Sáiz , Dmitri Semikoz , Lang Shao , Oleg Shchegolev , Yunzhi Shen , Xiangdong Sheng , Zhaodong Shi , Fuwen Shu , Huichao Song , Vladimir Stepanov Stepanov , Yang Su , Dongxu Sun , Hao Sun , Qinning Sun , Xiaona Sun , Zhibin Sun , Mr Nabeel Tabasam , Jumpei Takata , P. H. T. Tam , Honbin Tan , Qingwen Tang , Ruiyi Tang , Zebo Tang , Wenwu Tian , Chaonan Tong , Li-Hong Wan , 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 Wang , Daming Wei , Jun-Jie Wei , Yongjian Wei , Tao Wen , Shan-Shan Weng , Chaoyong Wu , Hanrong Wu , Qingwen Wu , Sha Wu , Xue-Feng Wu , Yusheng Wu , Shaoqiang Xi , Jie Xia , Junji Xia , Guangman Xiang , Dixuan Xiao , Gang Xiao , Yuliang Xin , Yi Xing , Dingrong Xiong , Zheng Xiong , Donglian Xu , Renfeng Xu , Renxin Xu , Weili Xu , Liang Xue , Dahai Yan , Tian Yan , Chaowen Yang , Chuyuan Yang , Fengfan Yang , Lili Yang , Mingjie Yang , Ruizhi Yang , Ms Wen-xin Yang , Zihan Yang , Zhiguo Yao , Xuanang Ye , Liqiao Yin , Na Yin , Xiaohao You , Zhiyong You , Qiang Yuan , Hua Yue , Houdun Zeng , Tingxuan Zeng , Wei Zeng , Xiangtao Zeng , Min Zha , 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 Zhang , Jing Zhao , Lei Zhao , Lizhi Zhao , Shiping Zhao , Xiao-Hong Zhao , Zihao Zhao , Fu Zheng , Wenjuan Zhong , Bin Zhou , Hao Zhou , Jianeng Zhou , Meng Zhou , Ping Zhou , Rong Zhou , Xiaoxi Zhou , Xunxiu Zhou , Ben-Yang Zhu , Chengguang Zhu , Fengrong Zhu , Hui Zhu , Kejun Zhu , Yuan-chuan Zou , Xiong Zuo , Oscar Macias

On the Contribution of Unresolved Pulsars to the Ultra-high-energy Galactic Diffuse Gamma-Ray Emission

The ultra high-energy (UHE) Galactic diffuse gamma-ray emission holds important information on the propagation of cosmic rays in the Galaxy. However, its measurements suffer from a contamination from unresolved sources whose contribution…

High Energy Astrophysical Phenomena · Physics 2024-11-04 Samy Kaci , Gwenael Giacinti , Dmitri Semikoz

Discovery of very-high-energy gamma-ray emission from the vicinity of PSR J1831-952 with H.E.S.S

We report on the latest discovery of an extended Very High Energy (VHE) gamma-ray source near the 67 ms pulsar PSR J1831-0952 during the H.E.S.S. Galactic Plane Survey (GPS). The dispersion measure distance of the pulsar (4.3 kpc) would…

High Energy Astrophysical Phenomena · Physics 2019-08-13 F. Sheidaei , A. Djannati-Ataï , H. Gast

Search for Sources of Ultrahigh Energy Cosmic Rays

The connection between the arrival directions of ultrahigh energy cosmic rays by using the EAS array data and point galactic sources of radio-and gamma-radiations, pulsars,is sought. At the mean particle energy of 10^{19} eV the correlation…

Astrophysics · Physics 2007-05-23 A. A. Mikhailov

Gamma-Ray Pulsars: Models and Predictions

Pulsed emission from gamma-ray pulsars originates inside the magnetosphere, from radiation by charged particles accelerated near the magnetic poles or in the outer gaps. In polar cap models, the high energy spectrum is cut off by magnetic…

Astrophysics · Physics 2009-10-31 Alice K. Harding

Search for Pulsed VHE Gamma-Ray Emission from Young Pulsars with H.E.S.S

We present the results of a search for pulsed very-high-energy (VHE) gamma-ray emission from young pulsars using data taken with the H.E.S.S. imaging atmospheric Cherenkov telescope system. Data on eleven pulsars, selected according to…

Astrophysics · Physics 2009-11-13 The HESS Collaboration , F. Aharonian

Study of maximum electron energy of sub-PeV pulsar wind nebulae by multiwavelength modelling

Recently, the Large High Altitude Air Shower Observatory (LHAASO) reported the discovery of 12 ultrahigh-energy (UHE; $\mathrm{\varepsilon} \ge 100$ TeV) gamma-ray sources located in the Galactic plane. A few of these UHE gamma-ray emitting…

High Energy Astrophysical Phenomena · Physics 2023-02-22 Jagdish C. Joshi , Shuta J. Tanaka , Luis Salvador Miranda , Soebur Razzaque

Search for Pulsed VHE gamma-ray Emission from Young Pulsars with H.E.S.S

Pulsars are commonly regarded as highly magnetized neutron stars, rotating up to several hundred times per second. Over 1,500 radio pulsars have been found so far, about 70 of which are X-ray pulsars, but only a handful have been observed…

Astrophysics · Physics 2019-08-14 A. Konopelko , P. Chadwick , T. Eifert , T. Lohse , A. Noutsos , S. Rayner , F. Schmidt , U. Schwanke , Ch. Stegmann

Diffuse Ultra-High-Energy Gamma-Ray Emission From TeV Halos

The LHAASO Collaboration has recently reported a measurement of the diffuse gamma-ray emission from the Galactic Plane at energies between 10 TeV and 1 PeV. While this emission is brighter than that expected from cosmic-ray interactions in…

High Energy Astrophysical Phenomena · Physics 2024-10-18 Ariane Dekker , Ian Holst , Dan Hooper , Giovani Leone , Emily Simon , Huangyu Xiao

Evidence of TeV Halos Around Millisecond Pulsars

Using data from the HAWC gamma-ray Telescope, we have studied a sample of 37 millisecond pulsars (MSPs), selected for their spindown power and proximity. From among these MSP, we have identified four which favor the presence of very…

High Energy Astrophysical Phenomena · Physics 2022-05-25 Dan Hooper , Tim Linden

Ultra-high-energy $\gamma$-ray emission associated with the tail of a bow-shock pulsar wind nebula

In this study, we present a comprehensive analysis of an unidentified point-like ultra-high-energy (UHE) $\gamma$-ray source, designated as 1LHAASO J1740+0948u, situated in the vicinity of the middle-aged pulsar PSR J1740+1000. The…

High Energy Astrophysical Phenomena · Physics 2025-02-25 Zhen Cao , F. Aharonian , Y. X. Bai , Y. W. Bao , D. Bastieri , X. J. Bi , Y. J. Bi , W. Bian , A. V. Bukevich , C. M. Cai , W. Y. Cao , Zhe Cao , J. Chang , J. F. Chang , A. M. Chen , E. S. Chen , H. X. Chen , Liang Chen , Long Chen , M. J. Chen , M. L. Chen , Q. H. Chen , S. Chen , S. H. Chen , S. Z. Chen , T. L. Chen , X. B. Chen , X. J. Chen , Y. Chen , N. Cheng , Y. D. Cheng , M. C. Chu , M. Y. Cui , S. W. Cui , X. H. Cui , Y. D. Cui B. Z. Dai , H. L. Dai , Z. G. Dai , Danzengluobu , Y. X. Diao , X. Q. Dong , K. K. Duan , J. H. Fan , Y. Z. Fan , J. Fang , J. H. Fang , K. Fang , C. F. Feng , H. Feng L. Feng , S. H. Feng , X. T. Feng , Y. Feng , Y. L. Feng , S. Gabici , B. Gao , C. D. Gao , Q. Gao , W. Gao , W. K. Gao , M. M. Ge , T. T. Ge L. S. Geng , G. Giacinti , G. H. Gong , Q. B. Gou , M. H. Gu , F. L. Guo , J. Guo , X. L. Guo , Y. Q. Guo , Y. Y. Guo , Y. A. Han , O. A. Hannuksela , M. Hasan , H. H. He , H. N. He , J. Y. He , X. Y. He , Y. He , S. Hernández-Cadena , Y. K. Hor B. W. Hou , C. Hou , X. Hou , H. B. Hu , S. C. Hu , C. Huang , D. H. Huang , J. J. Huang , T. Q. Huang , W. J. Huang X. T. Huang , X. Y. Huang , Y. Huang , Y. Y. Huang , X. L. Ji , H. Y. Jia , K. Jia , H. B. Jiang , K. Jiang , X. W. Jiang , Z. J. Jiang , M. Jin , S. Kaci , M. M. Kang , I. Karpikov , D. Khangulyan , D. Kuleshov , K. Kurinov , B. B. Li , Cheng Li , Cong Li , D. Li , F. Li , H. B. Li , H. C. Li , Jian Li , Jie Li , K. Li , L. Li , R. L. Li , S. D. Li , T. Y. Li , W. L. Li , X. R. Li , Xin Li , Y. Z. Li , Zhe Li , Zhuo Li , E. W. Liang Y. F. Liang S. J. Lin B. Liu , C. Liu , D. Liu , D. B. Liu , H. Liu , H. D. Liu , J. Liu , J. L. Liu , J. R. Liu , M. Y. Liu , R. Y. Liu , S. M. Liu , W. Liu , X. Liu , Y. Liu , Y. Liu , Y. N. Liu , Y. Q. Lou , Q. Luo Y. Luo , H. K. Lv , B. Q. Ma , L. L. Ma , X. H. Ma , J. R. Mao , Z. Min , W. Mitthumsiri , G. B. Mou , H. J. Mu , Y. C. Nan , A. Neronov , K. C. Y. Ng , M. Y. Ni , L. Nie , L. J. Ou , P. Pattarakijwanich , Z. Y. Pei , J. C. Qi , M. Y. Qi , J. J. Qin , A. Raza , C. Y. Ren , D. Ruffolo , A. Sáiz , M. Saeed , D. Semikoz , L. Shao , O. Shchegolev , Y. Z. Shen , X. D. Sheng , Z. D. Shi , F. W. Shu , H. C. Song , Yu. V. Stenkin , V. Stepanov , Y. Su , D. X. Sun , Q. N. Sun , X. N. Sun Z. B. Sun , J. Takata , P. H. T. Tam H. B. Tan , Q. W. Tang , R. Tang , Z. B. Tang , W. W. Tian , C. N. Tong , L. H. Wan C. Wang , G. W. Wang , H. G. Wang , H. H. Wang J. C. Wang , K. Wang , Kai Wang , Kai Wang , L. P. Wang , L. Y. Wang , L. Y. Wang , R. Wang , W. Wang X. G. Wang X. J. Wang , X. Y. Wang , Y. Wang , Y. D. Wang , Z. H. Wang , Z. X. Wang , Zheng Wang , D. M. Wei , J. J. Wei , Y. J. Wei , T. Wen , S. S. Weng , C. Y. Wu , H. R. Wu , Q. W. Wu , S. Wu , X. F. Wu , Y. S. Wu , S. Q. Xi , J. Xia , J. J. Xia , G. M. Xiang , D. X. Xiao , G. Xiao , Y. L. Xin , Y. Xing , D. R. Xiong , Z. Xiong , D. L. Xu , R. F. Xu , R. X. Xu , W. L. Xu , L. Xue , D. H. Yan , J. Z. Yan , T. Yan , C. W. Yang , C. Y. Yang , F. F. Yang , L. L. Yang M. J. Yang , R. Z. Yang , W. X. Yang , Y. H. Yao , Z. G. Yao , X. A. Ye , L. Q. Yin , N. Yin , X. H. You , Z. Y. You , Y. H. Yu , Q. Yuan , H. Yue , H. D. Zeng , T. X. Zeng , W. Zeng , M. Zha , B. B. Zhang , B. T. Zhang , F. Zhang , H. Zhang , H. M. Zhang H. Y. Zhang , J. L. Zhang , Li Zhang , P. F. Zhang , P. P. Zhang , R. Zhang , S. R. Zhang , S. S. Zhang , W. Y. Zhang , X. Zhang , X. P. Zhang , Yi Zhang , Yong Zhang , Z. P. Zhang , J. Zhao , L. Zhao , L. Z. Zhao , S. P. Zhao , X. H. Zhao , Z. H. Zhao , F. Zheng , W. J. Zhong , B. Zhou , H. Zhou , J. N. Zhou , M. Zhou , P. Zhou , R. Zhou , X. X. Zhou , X. X. Zhou , B. Y. Zhu , C. G. Zhu , F. R. Zhu , H. Zhu , K. J. Zhu , Y. C. Zou , X. Zuo

High-Energy Emission Induced by Ultra-High-Energy Photons as a Probe of Ultra-High-Energy Cosmic-Ray Accelerators Embedded in the Cosmic Web

The photomeson production in ultra-high-energy cosmic-ray (UHECR) accelerators such as gamma-ray bursts and active galaxies may lead to ultra-high-energy (UHE) gamma-ray emission. We show that generation of UHE pairs in magnetized…

High Energy Astrophysical Phenomena · Physics 2012-01-10 Kohta Murase

Ultra-High Energy Gamma Rays in Geomagnetic Field and Atmosphere

The nature and origin of ultra-high energy (UHE: reffering to > 10^19 eV) cosmic rays are great mysteries in modern astrophysics. The current theories for their explanation include the so-called "top-down" decay scenarios whose main…

Astrophysics · Physics 2009-11-07 H. P. Vankov , N. Inoue , K. Shinozaki

On the potential of bright, young pulsars to power ultra-high gamma-ray sources

The recent discovery of a new population of ultra-high-energy gamma-ray sources with spectra extending beyond 100 TeV revealed the presence of Galactic PeVatrons - cosmic-ray factories accelerating particles to PeV energies. These sources,…

High Energy Astrophysical Phenomena · Physics 2022-05-11 Emma de Oña Wilhelmi , Rubén López-Coto , Elena Amato , Felix Aharonian

Prospects of observing pulsed radiation from gamma-ray pulsars with H.E.S.S

Observations and theoretical studies have demonstrated that the pulsed spectra of all gamma-ray pulsars terminate at energies below a few hundred GeV. In most cases we expect this cutoff energy E_o to be around 10 GeV. Only with next…

Astrophysics · Physics 2009-10-31 O. C. de Jager , A. Konopelko , B. C. Raubenheimer , B. Visser

The pulsar contribution to the diffuse galactic gamma-ray emission

There is active interest in the extent to which unresolved gamma-ray pulsars contribute to the galactic diffuse emission, and whether unresolved gamma-ray pulsars could be responsible for the excess of diffuse galactic emission above 1 GeV…

Astrophysics · Physics 2007-05-23 Martin Pohl , Gottfried Kanbach , Stan D. Hunter , Brian B. Jones

Modelling of highly extended Gamma-ray emission around the Geminga Pulsar as detected with H.E.S.S

Geminga is an enigmatic radio-quiet gamma-ray pulsar located at a mere 250 pc distance from Earth. Extended very-high-energy gamma-ray emission around the pulsar has been detected by multiple water Cherenkov detector based instruments.…

High Energy Astrophysical Phenomena · Physics 2023-09-01 A. M. W. Mitchell , S. Caroff

Gamma-Ray Pulsars

Gamma-ray photons from young pulsars allow the deepest insight into the properties and interactions of high-energy particles with magnetic and photon fields in a pulsar magnetosphere. Measurements with the Compton Gamma-Ray Observatory have…

Astrophysics · Physics 2009-09-29 Gottfried Kanbach