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Measurement of the Cosmic Ray e(+)+e(-) Spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
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2009 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 102, no 18Article in journal (Refereed) Published
Abstract [en]

Designed as a high-sensitivity gamma-ray observatory, the Fermi Large Area Telescope is also an electron detector with a large acceptance exceeding 2 m(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.

Place, publisher, year, edition, pages
2009. Vol. 102, no 18
Keyword [en]
supernova-remnants, gamma-rays, electrons, energies
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:kth:diva-18414DOI: 10.1103/PhysRevLett.102.181101ISI: 000265948600011ScopusID: 2-s2.0-67650305376OAI: diva2:336461
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2012-02-23Bibliographically approved

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Axelsson, M.Ryde, FelixBattelino, MilanCarlson, PerConrad, JanYlinen, TomiMoretti, Elena
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