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Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons

High energy cosmic ray electrons plus positrons (CREs), which lose energy quickly during their propagation, provide an ideal probe of Galactic high-energy processes and may enable the observation of phenomena such as dark-matter particle…

High Energy Astrophysical Phenomena · Physics 2017-12-11 G. Ambrosi , Q. An , R. Asfandiyarov , P. Azzarello , P. Bernardini , B. Bertucci , M. S. Cai , J. Chang , D. Y. Chen , H. F. Chen , J. L. Chen , W. Chen , M. Y. Cui , T. S. Cui , A. D'Amone , A. De Benedittis , I. De Mitri , M. Di Santo , J. N. Dong , T. K. Dong , Y. F. Dong , Z. X. Dong , G. Donvito , D. Droz , K. K. Duan , J. L. Duan , M. Duranti , D. D'Urso , R. R. Fan , Y. Z. Fan , F. Fang , C. Q. Feng , L. Feng , P. Fusco , V. Gallo , F. J. Gan , M. Gao , S. S. Gao , F. Gargano , S. Garrappa , K. Gong , Y. Z. Gong , D. Y. Guo , J. H. Guo , Y. M. Hu , G. S. Huang , Y. Y. Huang , M. Ionica , D. Jiang , W. Jiang , X. Jin , J. Kong , S. J. Lei , S. Li , X. Li , W. L. Li , Y. Li , Y. F. Liang , Y. M. Liang , N. H. Liao , H. Liu , J. Liu , S. B. Liu , W. Q. Liu , Y. Liu , F. Loparco , M. Ma , P. X. Ma , S. Y. Ma , T. Ma , X. Q. Ma , X. Y. Ma , G. Marsella , M. N. Mazziotta , D. Mo , X. Y. Niu , X. Y. Peng , W. X. Peng , R. Qiao , J. N. Rao , M. M. Salinas , G. Z. Shang , W. H. Shen , Z. Q. Shen , Z. T. Shen , J. X. Song , H. Su , M. Su , Z. Y. Sun , A. Surdo , X. J. Teng , X. B. Tian , A. Tykhonov , V. Vagelli , S. Vitillo , C. Wang , H. Wang , H. Y. Wang , J. Z. Wang , L. G. Wang , Q. Wang , S. Wang , X. H. Wang , X. L. Wang , Y. F. Wang , Y. P. Wang , Y. Z. Wang , S. C. Wen , Z. M. Wang , D. M. Wei , J. J. Wei , Y. F. Wei , D. Wu , J. Wu , L. B. Wu , S. S. Wu , X. Wu , K. Xi , Z. Q. Xia , Y. L. Xin , H. T. Xu , Z. L. Xu , Z. Z. Xu , G. F. Xue , H. B. Yang , P. Yang , Y. Q. Yang , Z. L. Yang , H. J. Yao , Y. H. Yu , Q. Yuan , C. Yue , J. J. Zang , C. Zhang , D. L. Zhang , F. Zhang , J. B. Zhang , J. Y. Zhang , J. Z. Zhang , L. Zhang , P. F. Zhang , S. X. Zhang , W. Z. Zhang , Y. Zhang , Y. J. Zhang , Y. Q. Zhang , Y. L. Zhang , Y. P. Zhang , Z. Zhang , Z. Y. Zhang , H. Zhao , H. Y. Zhao , X. F. Zhao , C. Y. Zhou , Y. Zhou , X. Zhu , Y. Zhu , S. Zimmer

A Cosmic-ray Electron Spectrum with VERITAS

Cosmic-ray electrons and positrons (CREs) at GeV-TeV energies are a unique probe of our local Galactic neighbourhood. CREs lose energy rapidly via inverse Compton scattering and synchrotron processes while propagating in the Galaxy,…

High Energy Astrophysical Phenomena · Physics 2019-08-13 David Staszak

Measurement of Cosmic-ray Electrons at TeV Energies by VERITAS

Cosmic-ray electrons and positrons (CREs) at GeV-TeV energies are a unique probe of our local Galactic neighborhood. CREs lose energy rapidly via synchrotron radiation and inverse-Compton scattering processes while propagating within the…

High Energy Astrophysical Phenomena · Physics 2019-02-20 VERITAS Collaboration , A. Archer , W. Benbow , R. Bird , R. Brose , M. Buchovecky , J. H. Buckley , V. Bugaev , M. P. Connolly , W. Cui , Q. Feng , J. P. Finley , L. Fortson , A. Furniss , G. Gillanders , M. Hütten , D. Hanna , O. Hervet , J. Holder , G. Hughes , T. B. Humensky , C. A. Johnson , P. Kaaret , P. Kar , N. Kelley-Hoskins , M. Kertzman , D. Kieda , M. Krause , F. Krennrich , S. Kumar , M. J. Lang , T. T. Y. Lin , G. Maier , S. McArthur , P. Moriarty , R. Mukherjee , S. O'Brien , R. A. Ong , A. N. Otte , A. Petrashyk , M. Pohl , E. Pueschel , J. Quinn , K. Ragan , P. T. Reynolds , G. T. Richards , E. Roache , C. Rulten , I. Sadeh , M. Santander , G. H. Sembroski , D. Staszak , I. Sushch , J. Tyler , S. P. Wakely , R. M. Wells , P. Wilcox , A. Wilhelm , D. A. Williams , T. J Williamson , B. Zitzer

Bayesian analysis of the break in DAMPE lepton spectra

Recently, DAMPE has released its first results on the high-energy cosmic-ray electrons and positrons (CREs) from about $25$ GeV to $4.6$ TeV, which directly detect a break at $\sim 1$ TeV. This result gives us an excellent opportunity to…

High Energy Astrophysical Phenomena · Physics 2018-05-02 Jia-Shu Niu , Tianjun Li , Ran Ding , Bing Zhu , Hui-Fang Xue , Yang Wang

Galactic Gamma-Ray Diffuse Emission at TeV energies with HAWC Data

The Galactic gamma-ray diffuse emission (GDE) is emitted by cosmic rays (CRs), ultra-relativistic protons and electrons, interacting with gas and electromagnetic radiation fields in the interstellar medium. Here we present the analysis of…

High Energy Astrophysical Phenomena · Physics 2023-10-16 R. Alfaro , C. Alvarez , J. C. Arteaga-Velazquez , K. P. Arunbabu , D. Avila Rojas , R. Babu , V. Baghmanyan , E. Belmont-Moreno , C. Brisbois , K. S. Caballero-Mora , T. Capistran , A. Carraminana , S. Casanova , O. Chaparro-Amaro , U. Cotti , J. Cotzomi , S. Coutino de Leon , E. De la Fuente , R. Diaz Hernandez , M. A. DuVernois , M. Durocher , J. C. Dıaz-Velez , K. Engel , C. Espinoza , K. L. Fan , N. Fraija , A. Galvan-Gamez , J. A. Garcıa-Gonzalez , F. Garfias , M. M. Gonzalez , J. A. Goodman , S. Hernandez , B. Hona , D. Huang , F. Hueyotl-Zahuantitla , T. B. Humensky , A. Iriarte , V. Joshi , S. Kaufmann , D. Kieda , G. J. Kunde , A. Lara , H. Leon Vargas , J. T. Linnemann , A. L. Longinotti , G. Luis-Raya , K. Malone , O. Martinez , J. Martınez-Castro , J. A. Matthews , P. Miranda-Romagnoli , E. Moreno , M. Mostafa , A. Nayerhoda , L. Nellen , R. Noriega-Papaqui , E. G. Perez-Perez , D. Rosa-Gonzalez , E. Ruiz-Velasco , H. Salazar , D. Salazar-Gallegos , F. Salesa Greus , A. Sandoval , J. Serna-Franco , A. J. Smith , R. W. Springer , O. Tibolla , K. Tollefson , I. Torres , R. Torres-Escobedo , F. Urena-Mena , L. Villasenor , E. Willox , H. Zhou , C. de Leon , O. Fornieri , D. Gaggero , D. Grasso , A. Marinelli , S. Ventura

Spectra of cosmic ray electrons and diffuse gamma rays with the constraints of AMS-02 and HESS data

Recently, AMS-02 reported their observed results of cosmic rays(CRs). In addition to the AMS-02 data, we add HESS data to estimate the spectra of CR electrons and the diffuse gamma rays above TeV. In the conventional diffusion model, a…

High Energy Astrophysical Phenomena · Physics 2015-10-06 Ding Chen , Jing Huang , Hong-Bo Jin

Implications of a possible TeV break in the cosmic-ray electron and positron flux

A TeV spectral break in the total flux of cosmic-ray electrons and positrons (CREs) at which the spectral power index softens from $\sim 3$ to $\sim 4$ has been observed by H.E.S.S. and recently confirmed by DAMPE with a high significance…

High Energy Astrophysical Phenomena · Physics 2021-06-16 Yu-Chen Ding , Nan Li , Chun-Cheng Wei , Yue-Liang Wu , Yu-Feng Zhou

Galactic Diffuse $\gamma$-ray Emission at TeV Energies and the Ultra-High Energy Cosmic Rays

Using the cosmic ray (CR) data available in the energy interval $(10 - 2 \times 10^{7})$ GeV/particle, we have calculated the profile of the primary $\gamma$-ray spectrum produced by the interaction of these CR with thermal nuclei of the…

Astrophysics · Physics 2009-10-30 G. A. Medina Tanco , E. M. de Gouveia Dal Pino

Perspective on the cosmic-ray electron spectrum above TeV

The AMS-02 has measured the cosmic ray electron (plus positron) spectrum up to ~TeV with an unprecedent precision. The spectrum can be well described by a power law without any obvious features above 10 GeV. The satellite instrument Dark…

High Energy Astrophysical Phenomena · Physics 2017-02-22 Kun Fang , Bing-Bing Wang , Xiao-Jun Bi , Su-Jie Lin , Peng-Fei Yin

Anisotropic Cosmic Ray Diffusion and its Implications for Gamma-Ray Astronomy

Analyses of TeV-PeV cosmic ray (CR) diffusion around their sources usually assume either isotropic diffusion or anisotropic diffusion due to the regular Galactic magnetic field. We show that none of them are adequate on distances smaller…

High Energy Astrophysical Phenomena · Physics 2013-07-29 G. Giacinti , M. Kachelriess , D. V. Semikoz

Exploring the high energy frontiers of the Milky Way with ground-based gamma-ray astronomy: PeVatrons and the quest for the origin of Galactic cosmic-rays

Cosmic rays (CRs) are charged particles that arrive at Earth isotropically from all directions and interact with the atmosphere. The presence of a spectral knee feature seen in the CR spectrum at $\sim$3 PeV energies is an evidence that…

High Energy Astrophysical Phenomena · Physics 2023-05-23 E. O. Angüner

Measurement of separate electron and positron spectra from 10 GeV to 20GeV with the geomagnetic field on DAMPE

The cosmic-ray (CR) electrons and positrons in space are of great significance for studying the origin and propagation of cosmic-rays. The satellite-borne experiment DArk Matter Particle Explorer (DAMPE) has been used to measure the…

High Energy Astrophysical Phenomena · Physics 2025-08-25 DAMPE Collaboration , F. Alemanno , Q. An , P. Azzarello , F. C. T. Barbato , P. Bernardini , X. J. Bi , H. Boutin , I. Cagnoli , M. S. Cai , E. Casilli , E. Catanzani , J. Chang , D. Y. Chen , J. L. Chen , Z. F. Chen , Z. X. Chen , P. Coppin , M. Y. Cui , T. S. Cui , Y. X. Cui , I. DeMitri , F. dePalma , A. DiGiovanni , T. K. Dong , Z. X. Dong , G. Donvito , D. Droz , J. L. Duan , K. K. Duan , R. R. Fan , Y. Z. Fan , F. Fang , K. Fang , C. Q. Feng , L. Feng , J. M. Frieden , P. Fusco , M. Gao , F. Gargano , E. Ghose , K. Gong , Y. Z. Gong , D. Y. Guo , J. H. Guo , S. X. Han , Y. M. Hu , G. S. Huang , X. Y. Huang , Y. Y. Huang , M. Ionica , L. Y. Jiang , Y. Z. Jiang , W. Jiang , J. Kong , A. Kotenko , D. Kyratzis , S. J. Lei , M. B. Li , W. H. Li , W. L. Li , X. Li , X. Q. Li , Y. M. Liang , C. M. Liu , H. Liu , J. Liu , S. B. Liu , Y. Liu , F. Loparco , C. N. Luo , M. Ma , P. X. Ma , T. Ma , X. Y. Ma , G. Marsella , M. N. Mazziotta , D. Mo , Y. Nie , X. Y. Niu , A. Parenti , W. X. Peng , X. Y. Peng , C. Perrina , E. Putti-Garcia , R. Qiao , J. N. Rao , Y. Rong , R. Sarkar , P. Savina , A. Serpolla , Z. Shangguan , W. H. Shen , Z. Q. Shen , Z. T. Shen , L. Silveri , J. X. Song , M. Stolpovskiy , H. Su , M. Su , H. R. Sun , Z. Y. Sun , A. Surdo , X. J. Teng , A. Tykhonov , G. F. Wang , J. Z. Wang , L. G. Wang , S. Wang , X. L. Wang , Y. F. Wang , Y. Wang , D. M. Wei , J. J. Wei , Y. F. Wei , D. Wu , J. Wu , S. S. Wu , X. Wu , Z. Q. Xia , Z. Xiong , E. H. Xu , H. T. Xu , J. Xu , Z. H. Xu , Z. L. Xu , Z. Z. Xu , G. F. Xue , H. B. Yang , P. Yang , Y. Q. Yang , H. J. Yao , M. Y. Yan , Y. H. Yu , Q. Yuan , C. Yue , J. J. Zang , S. X. Zhang , W. Z. Zhang , Y. Zhang , Y. Zhang , Y. J. Zhang , Y. L. Zhang , Y. P. Zhang , Y. Q. Zhang , Z. Zhang , Z. Y. Zhang , C. Zhao , H. Y. Zhao , X. F. Zhao , C. Y. Zhou , Y. Zhu

Scalar dark matter, Type II Seesaw and the DAMPE cosmic ray $e^+ + e^-$ excess

The DArk Matter Particle Explorer (DAMPE) has reported a measurement of the flux of high energy cosmic ray electrons plus positrons (CREs) in the energy range between $25$ GeV and $4.6$ TeV. With unprecedented high energy resolution, the…

High Energy Physics - Phenomenology · Physics 2018-02-07 Tong Li , Nobuchika Okada , Qaisar Shafi

High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S

Owing to their rapid cooling rate and hence loss-limited propagation distance, cosmic-ray electrons and positrons (CRe) at very high energies probe local cosmic-ray accelerators and provide constraints on exotic production mechanisms such…

High Energy Astrophysical Phenomena · Physics 2024-11-26 F. Aharonian , F. Ait Benkhali , J. Aschersleben , H. Ashkar , M. Backes , V. Barbosa Martins , R. Batzofin , Y. Becherini , D. Berge , K. Bernlöhr , B. Bi , M. Böttcher , C. Boisson , J. Bolmont , M. de Bony de Lavergne , J. Borowska , M. Bouyahiaoui , R. Brose , A. Brown , F. Brun , B. Bruno , T. Bulik , C. Burger-Scheidlin , T. Bylund , S. Casanova , J. Celic , M. Cerruti , T. Chand , S. Chandra , A. Chen , J. Chibueze , O. Chibueze , T. Collins , G. Cotter , J. Damascene Mbarubucyeye , J. Devin , J. Djuvsland , A. Dmytriiev , K. Egberts , S. Einecke , J. -P. Ernenwein , S. Fegan , K. Feijen , G. Fontaine , S. Funk , S. Gabici , Y. A. Gallant , J. F. Glicenstein , J. Glombitza , G. Grolleron , B. Heß , W. Hofmann , T. L. Holch , M. Holler , D. Horns , Zhiqiu Huang , M. Jamrozy , F. Jankowsky , V. Joshi , I. Jung-Richardt , E. Kasai , K. Katarzynski , D. Kerszberg , R. Khatoon , B. Khelifi , W. Kluzniak , Nu. Komin , K. Kosack , D. Kostunin , A. Kundu , R. G. Lang , S. Le Stum , F. Leitl , A. Lemiere , M. Lemoine-Goumard , J. -P. Lenain , F. Leuschner , A. Luashvili , J. Mackey , D. Malyshev , D. Malyshev , V. Marandon , P. Marinos , G. Marti-Devesa , R. Marx , M. Meyer , A. Mitchell , R. Moderski , M. O. Moghadam , L. Mohrmann , A. Montanari , E. Moulin , M. de Naurois , J. Niemiec , S. Ohm , L. Olivera-Nieto , E. de Ona Wilhelmi , M. Ostrowski , S. Panny , M. Panter , D. Parsons , U. Pensec , G. Peron , G. Pühlhofer , M. Punch , A. Quirrenbach , S. Ravikularaman , M. Regeard , A. Reimer , O. Reimer , I. Reis , H. Ren , B. Reville , F. Rieger , G. Rowell , B. Rudak , E. Ruiz-Velasco , V. Sahakian , H. Salzmann , A. Santangelo , M. Sasaki , J. Schäfer , F. Schüssler , H. M. Schutte , J. N. S. Shapopi , A. Sharma , H. Sol , S. Spencer , L. Stawarz , S. Steinmassl , C. Steppa , H. Suzuki , T. Takahashi , T. Tanaka , A. M. Taylor , R. Terrier , M. Tsirou , C. van Eldik , M. Vecchi , C. Venter , J. Vink , T. Wach , S. J. Wagner , A. Wierzcholska , M. Zacharias , A. A. Zdziarski , A. Zech , N. Zywucka

Diffuse TeV Gamma-Ray Emission in the H.E.S.S. Galactic Plane Survey

Diffuse gamma-ray emission has long been established as the most prominent feature in the GeV sky. Although the imaging atmospheric Cherenkov technique has been successful in revealing a large population of discrete TeV gamma-ray sources, a…

High Energy Astrophysical Phenomena · Physics 2019-08-15 K. Egberts , F. Brun , S. Casanova , W. Hofmann , M. de Naurois , O. Reimer , Q. Weitzel , Y. Fukui

Cosmic ray electrons and the diffuse gamma ray spectrum

The bulk of the diffuse galactic gamma-ray emission above a few tens of GeV has been conventionally ascribed to the decay of neutral pions produced in cosmic-ray interactions with interstellar matter. Cosmic-ray electrons may, however, make…

Astrophysics · Physics 2008-11-26 T. A. Porter , R. J. Protheroe

The High Energy Cosmic Ray Electron Spectrum measured by Fermi Gamma-Ray Space Telescope: some possible interpretations

The Fermi Large Area Telescope (LAT) has provided the measurement of the high energy cosmic ray electrons plus positrons (CRE) spectrum with unprecedented accuracy form 20 GeV to 1 TeV. Recently this range has been extended down to ~ 7 GeV.…

High Energy Astrophysical Phenomena · Physics 2019-08-14 Giuseppe Di Bernardo , Daniele Gaggero , Dario Grasso

TeV Solar Gamma Rays From Cosmic-Ray Interactions

The Sun is a bright source of GeV gamma rays, due to cosmic rays interacting with solar matter and photons. Key aspects of the underlying processes remain mysterious. The emission in the TeV range, for which there are neither observational…

High Energy Astrophysical Phenomena · Physics 2017-08-09 Bei Zhou , Kenny C. Y. Ng , John F. Beacom , Annika H. G. Peter

Origin of TeV Galactic Cosmic Rays

We consider a possibility of identification of sources of cosmic rays (CR) of the energy above 1 TeV via observation of degree-scale extended gamma-ray emission which traces the locations of recent sources in the Galaxy. Such emission in…

High Energy Astrophysical Phenomena · Physics 2013-05-30 A. Neronov , D. V. Semikoz

Ultra-High-Energy Gamma-Ray Astronomy

Ultra-High Energy (UHE, $>$0.1\,PeV) $\gamma$-ray Astronomy is rapidly evolving into an expanding branch of the $\gamma$-ray astronomy with the surprising discovery of 12 PeVatrons and the detection of a handful of photons above 1 PeV.…

High Energy Astrophysical Phenomena · Physics 2023-10-04 Zhen Cao , Songzhan Chen , Ruoyu Liu , Ruizhi Yang