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Astron. Astrophys. 319, L5-L8 (1997)

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Letter to the Editor

[FORMULA] -ray evidence for galactic in-situ electron acceleration

R. Schlickeiser

Max-Planck-Institut für Radioastronomie, Postfach 2024, D-53010 Bonn, Germany

Received 19 September 1996 / Accepted 10 January 1997


Evidence for the possible existence of a strong flux of low-energy ([FORMULA] 10 MeV) cosmic ray electrons in the Galaxy has been recently established by GINGA, OSSE and COMPTEL observations of the diffuse galactic gamma ray continuum emission down to photon energies below 50 keV. We explain the implied presence of many low-energy cosmic ray electrons with the existence of interstellar in-situ reacceleration of cosmic ray particles by the ambient interstellar plasma turbulence.

Key words: cosmic ray electrons – bremsstrahlung emission – stochastic acceleration – interstellar plasma turbulence

Send offprint requests to: R. Schlickeiser


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© European Southern Observatory (ESO) 1997

Online publication: July 3, 1998