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- W2020439376 abstract "view Abstract Citations (50) References (58) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Nature of the Cosmic-Ray Electron Spectrum, and Supernova Remnant Contributions Boulares, Ahmed Abstract The observed cosmic-ray (CR) electron spectrum and position fraction e+/(e- + e+) spectrum above 1 GeV are examined, and it is found that a deconvolution of the total spectrum into three components is necessary because of the increase of e+/(e- + e+) above 5 GeV: (1) secondary electrons e+ or e- from the interaction of the CR protons with the interstellar gas provide the total e+ for energies less than 3 GeV, but for energies above 3 GeV these electrons cannot account for the observed positron flux; (2) Electrons (e-) generally thought to derive from supernova remnants (SNRs), probably via shock acceleration, dominate the total spectrum for E of 10 GeV or less but definitely decline relative to total at higher energies; (3) Another (e- + e+) source dominates the total spectrum at E of 40 GeV or greater. The derived spectrum of (2) is consistent in its energy cutoff (though gradual) with that deduced from the observed synchrotron emission of some old SNRs and follows naturally from shock acceleration with synchrotron and inverse Compton scattering losses taken into account. As for (3), nearby pulsars may be important contributors. Publication: The Astrophysical Journal Pub Date: July 1989 DOI: 10.1086/167637 Bibcode: 1989ApJ...342..807B Keywords: Cosmic Rays; Electron Radiation; Electronic Spectra; Supernova Remnants; Electron Energy; Mesons; Positrons; Pulsars; Spectral Energy Distribution; Stellar Envelopes; Space Radiation; COSMIC RAYS: GENERAL; NEBULAE: SUPERNOVA REMNANTS; RADIATION MECHANISMS; PULSARS full text sources ADS | data products SIMBAD (7)" @default.
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- W2020439376 date "1989-07-01" @default.
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- W2020439376 title "The nature of the cosmic-ray electron spectrum, and supernova remnant contributions" @default.
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