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Measurement of the Cosmic Raye++e−Spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Journal 04 May 2009Embargo end date: 01 Jan 2009 China (People's Republic of), Italy, France, United States, China (People's Republic of), Japan, Australia, United States Publisher:American Physical Society (APS)Journal:Physical Review Letters, volume 102 (issn: 0031-9007, eissn: 1079-7114,

Authors: S. Ritz; S. Ritz; P. Bruel;

F. Gargano; A. van Etten; M. Hayashida; M. Roth; +193 Authors

doi: 10.1103/physrevlett.102.181101 , 10.48550/arxiv.0905.0025

pmid: 19518855

arXiv: 0905.0025

handle: 20.500.11937/18851 , 11586/125485 , 10722/188361

Measurement of the Cosmic Raye++e−Spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope

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Abstract

Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2m^2 sr at 300 GeV. Building on the gamma-ray analysis, we have developed an efficient electron detection strategy which provides sufficient background rejection for measurement of the steeply-falling electron spectrum up to 1 TeV. Our high precision data show that the electron spectrum falls with energy as E^(-3.0) and does not exhibit prominent spectral features. Interpretations in terms of a conventional diffusive model as well as a potential local extra component are briefly discussed.

6 pages, 3 figures - submitted to Physical Review Letters on March 19, published online on May 4 - contact authors: L. Latronico, A. Moiseev

Countries

China (People's Republic of), Italy, France, United States, China (People's Republic of), Japan, Australia, United States

Related Organizations

Spanish National Research Council
Spain
University of Maryland, Baltimore
United States
Tokyo Institute of Technology
Japan
INFN Sezione di Roma III
Italy
INFN Sezione di Genova
Italy

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Keywords

[PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], and other elementary particles; cosmic rays, 95.85.Ry, FOS: Physical sciences, Electrons, [PHYS.ASTR.HE] Physics/Astrophysics/High Energy Astrophysical Phenomena, Astrophysics, High Energy Physics - Experiment, 98.70.Sa, [SDU.ASTR.HE] Sciences of the Universe/Astrophysics/High Energy Astrophysical Phenomena, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), muon, Hepph, Neutrino, Dark matter, Electron Detection, Cosmic rays, Accuracy, 96.50.sb, High Energy Astrophysical Phenomena (astro-ph.HE), Cosmology And Astronomy, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], pion, [ PHYS.ASTR.HE ] Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Hepex, 96.50.sb; 95.35.+d; 95.85.Ry; 98.70.Sa, energy spectra and interactions, Telescopes Astrophysics, Experiment-Hep, 520, High Energy Physics - Phenomenology, Phenomenology-Hep,Astro, 95.35.+d, [ SDU.ASTR.HE ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Astrophysics - High Energy Astrophysical Phenomena, 79 Astrophysics, Composition

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5 Research products, page 1 of 1

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