Related papers: Measurement of the cosmic electron plus positron s…

The energy spectrum of cosmic-ray electrons at TeV energies

The very large collection area of ground-based gamma-ray telescopes gives them a substantial advantage over balloon/satellite based instruments in the detection of very-high-energy (>600 GeV) cosmic-ray electrons. Here we present the…

Astrophysics · Physics 2012-08-27 H. E. S. S. Collaboration , : , F. Aharonian

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 the Iron Spectrum with the MAGIC Telescopes

Iron cosmic rays represent the most abundant heavy nuclei at energies above 1 TeV, with their production thought to be primarily originated by astrophysical sources. Therefore, measuring the iron spectrum provides crucial insights into the…

High Energy Astrophysical Phenomena · Physics 2025-10-21 M. Molero , S. Mangano , C. Delgado

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

Cosmic ray electron and positron spectra at TeV energies

Observations of cosmic ray electrons have made great strides in the last decade and direct observations of the all-electron flux as well as separate electron and positron spectra are now available up to ~ 1 TeV. In this invited contribution…

High Energy Astrophysical Phenomena · Physics 2022-11-30 Philipp Mertsch

Cosmic-ray electron+positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope

We present a measurement of the cosmic-ray electron+positron spectrum between 7 GeV and 2 TeV performed with almost seven years of data collected with the Fermi Large Area Telescope. We find that the spectrum is well fit by a broken power…

High Energy Astrophysical Phenomena · Physics 2017-04-25 LAT Collaboration , S. Abdollahi , M. Ackermann , M. Ajello , W. B. Atwood , L. Baldini , G. Barbiellini , D. Bastieri , R. Bellazzini , E. D. Bloom , R. Bonino , T. J. Brandt , J. Bregeon , P. Bruel , R. Buehler , R. A. Cameron , R. Caputo , M. Caragiulo , D. Castro , E. Cavazzuti , C. Cecchi , A. Chekhtman , S. Ciprini , J. Cohen-Tanugi , F. Costanza , A. Cuoco , S. Cutini , F. D'Ammando , F. de Palma , R. Desiante , S. W. Digel , N. Di Lalla , M. Di Mauro , L. Di Venere , P. S. Drell , A. Drlica-Wagner , C. Favuzzi , W. B. Focke , S. Funk , P. Fusco , F. Gargano , D. Gasparrini , N. Giglietto , F. Giordano , M. Giroletti , D. Green , L. Guillemot , S. Guiriec , A. K. Harding , T. Jogler , G. Jóhannesson , T. Kamae , M. Kuss , G. La Mura , L. Latronico , F. Longo , F. Loparco , P. Lubrano , S. Maldera , D. Malyshev , A. Manfreda , M. N. Mazziotta , P. F. Michelson , N. Mirabal , W. Mitthumsiri , T. Mizuno , A. A. Moiseev , M. E. Monzani , A. Morselli , I. V. Moskalenko , M. Negro , E. Nuss , E. Orlando , D. Paneque , J. S. Perkins , M. Pesce-Rollins , F. Piron , G. Pivato , T. A. Porter , G. Principe , S. Rainò , R. Rando , M. Razzano , A. Reimer , O. Reimer , C. Sgrò , D. Simone , E. J. Siskind , F. Spada , G. Spandre , P. Spinelli , H. Tajima , J. B. Thayer , L. Tibaldo , D. F. Torres , E. Troja , M. Wood , A. Worley , G. Zaharijas , S. Zimmer

On the Energy Spectra of GeV/TeV Cosmic Ray Leptons

Recent observations of cosmic ray electrons from several instruments have revealed various degrees of deviation in the measured electron energy distribution from a simple power-law, in a form of an excess around TeV energies. An even more…

Astrophysics of Galaxies · Physics 2015-05-13 Lukasz Stawarz , Vahe Petrosian , Roger D. Blandford

Measurement of the Cosmic Ray electron plus positron spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope

Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2 sq-mt sr at 300 GeV. Building on the gamma-ray analysis, we have developed an efficient…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Luca Latronico

Possible structure in the cosmic ray electron spectrum measured by the ATIC-2 and ATIC-4 experiments

A strong excess in a form of a wide peak in the energy range of 300-800 GeV was discovered in the first measurements of the electron spectrum in the energy range from 20 GeV to 3 TeV by the balloon-borne experiment ATIC (J. Chang et al.…

High Energy Astrophysical Phenomena · Physics 2015-03-19 A. D. Panov , V. I. Zatsepin , N. V. Sokolskaya , J. H. Adams, , H. S. Ahn , G. L. Bashindzhagyan , J. Chang , M. Christl , T. G. Guzik , J. Isbert , K. C. Kim , E. N. Kouznetsov , M. I. Panasyuk , E. B. Postnikov , E. S. Seo , J. Watts , J. P. Wefel , J. Wu

A local fading accelerator and the origin of TeV cosmic ray electrons

The total cosmic ray electron spectrum (electrons plus positrons) exhibits a break at a particle energy of $\sim 1\rm~TeV$ and extends without any attenuation up to $\rm \sim 20~ TeV $. Synchrotron and inverse Compton energy losses strongly…

High Energy Astrophysical Phenomena · Physics 2019-06-05 S. Recchia , S. Gabici , F. A. Aharonian , J. Vink

Measurement of the cosmic-ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite

The precise measurement of the spectrum of protons, the most abundant component of the cosmic radiation, is necessary to understand the source and acceleration of cosmic rays in the Milky Way. This work reports the measurement of the cosmic…

High Energy Astrophysical Phenomena · Physics 2019-10-02 Q. An , R. Asfandiyarov , P. Azzarello , P. Bernardini , X. J. Bi , M. S. Cai , J. Chang , D. Y. Chen , H. F. Chen , J. L. Chen , W. Chen , M. Y. Cui , T. S. Cui , H. T. Dai , A. D'Amone , A. De Benedittis , I. De Mitri , M. Di Santo , M. Ding , T. K. Dong , Y. F. Dong , Z. X. Dong , G. Donvito , D. Droz , J. L. Duan , K. K. Duan , 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 , F. Gargano , K. Gong , Y. Z. Gong , D. Y. Guo , J. H. Guo , X. L. Guo , S. X. Han , Y. M. Hu , G. S. Huang , X. Y. Huang , Y. Y. Huang , M. Ionica , W. Jiang , X. Jin , J. Kong , S. J. Lei , S. Li , W. L. Li , X. Li , X. Q. Li , Y. Li , Y. F. Liang , Y. M. Liang , N. H. Liao , C. M. Liu , H. Liu , J. Liu , S. B. Liu , W. Q. Liu , Y. Liu , F. Loparco , C. N. Luo , M. Ma , P. X. Ma , S. Y. Ma , T. Ma , X. Y. Ma , G. Marsella , M. N. Mazziotta , D. Mo , X. Y. Niu , X. Pan , W. X. Peng , X. Y. 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 , A. Tykhonov , 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 , Z. M. Wang , D. M. Wei , J. J. Wei , Y. F. Wei , S. C. Wen , D. Wu , J. Wu , L. B. Wu , S. S. Wu , X. Wu , K. Xi , Z. Q. Xia , H. T. Xu , Z. H. 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 , F. Zhang , J. Y. Zhang , J. Z. Zhang , P. F. Zhang , S. X. Zhang , W. Z. Zhang , Y. Zhang , Y. J. Zhang , Y. L. Zhang , Y. P. Zhang , Y. Q. 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

Possible Interpretations of the High Energy Cosmic Ray Electron Spectrum measured with the Fermi Space Telescope

The Fermi Large Area Telescope has provided the measurement of the high energy (20 GeV to 1 TeV) cosmic ray electrons and positrons spectrum with unprecedented accuracy. This measurement represents a unique probe for studying the origin and…

High Energy Astrophysical Phenomena · Physics 2019-08-14 Dario Grasso

Measurement of the Proton Maximum Acceleration Energy in Galactic Cosmic Rays

Cosmic rays represent one of the most important energy transformation processes of the universe. They bring information about the surrounding universe, our galaxy, and very probably also the extragalactic space, at least at the highest…

High Energy Astrophysical Phenomena · Physics 2022-06-07 G. Di Sciascio , INFN - Roma Tor Vergata

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

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

The Cosmic Ray Lepton Puzzle

Recent measurements of cosmic ray electrons and positrons by PAMELA, ATIC, Fermi and HESS have revealed interesting excesses and features in the GeV-TeV range. Many possible explanations have been suggested, invoking one or more nearby…

High Energy Astrophysical Phenomena · Physics 2010-02-01 Pierre Brun , Gianfranco Bertone , Marco Cirelli , Emmanuel Moulin , Jean-Francois Glicenstein , Fabio Iocco , Lidia Pieri

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

Understanding the cosmic ray positron flux

Recent precision measurements of the flux of cosmic ray positrons by the Alpha Magnetic Spectrometer show that the spectrum has a marked softening feature for energies close to one TeV. A possible interpretation of this result is that the…

High Energy Astrophysical Phenomena · Physics 2019-02-19 Paolo Lipari

Galactic electron and positron properties from cosmic ray and radio observations

We perform a consistent modeling of cosmic ray electrons, positrons and of the radio emission of the Galaxy. For the time we reproduce all relevant data sets between 1 GeV and 1 TeV including the recent AMS-02 positron fraction results. We…

High Energy Astrophysical Phenomena · Physics 2013-07-01 D. Grasso , G. Di Bernardo , C. Evoli , D. Gaggero , L. Maccione

GeV Emission from TeV Blazars and Intergalactic Magnetic Fields

Several high-frequency peaked BL Lac objects such as Mrk 501 are strong TeV emitters. However, a significant fraction of the TeV gamma rays emitted are likely to be absorbed in interactions with the diffuse IR background, yielding…

Astrophysics · Physics 2009-11-07 Z. G. Dai , B. Zhang , L. J. Gou , P. Meszaros , E. Waxman