Diffuse galactic sub-MeV γ -ray excess from high-energy electrons

Details Diffuse galactic sub-MeV γ -ray excess from high-energy electrons Diffuse galactic sub-MeV γ -ray excess from high-energy electrons

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...442l..45s&link_type=abstract

Astronomy and Astrophysics, Volume 442, Issue 3, November II 2005, pp.L45-L48

Astronomy and Astrophysics

Astrophysics

6

Cosmic Ray Electrons, Diffuse Galactic Gamma Rays, Radiation Processes

Scientific paper

Recent INTEGRAL observations have confirmed the existence of diffuse sub-MeV radiation from the inner Galaxy. We propose a new explanation for the origin of this diffuse component in terms of electrostatic bremsstrahlung radiation from high-energy electrons. This electrostatic bremsstrahlung interpretation requires a very flat power law energy spectrum of high-energy electrons in the inner Galaxy which is reasonable if many point sources with significant spectral dispersion contribute to the injection of high-energy electrons in the Galaxy. The electrostatic bremsstrahlung interpretation avoids the enormous source power problem that previous explanations by radiation from low-energy electrons have.

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