The diffuse galactic continuum observed with EGRET: Where's the bump?

Details The diffuse galactic continuum observed with EGRET: Where's the bump? The diffuse galactic continuum observed with EGRET: Where's the bump?

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..410.1208s&link_type=abstract

The fourth compton symposium. AIP Conference Proceedings, Volume 410, pp. 1208-1212 (1997).

Computer Science

Gamma-Ray Sources, Gamma-Ray Bursts, Cosmic Rays, Gamma-Ray

Scientific paper

It is shown that the spectrum of the diffuse Galactic emission observed with EGRET is consistent with being solely due to electron bremsstrahlung and displays no clear pion bump. However, the required electron spectrum is harder than that observed locally and it is necessary to confine the bulk of the electrons in dark molecular clouds to avoid excess inverse Compton emission. Furthermore, the resulting synchrotron radio spectrum is harder than that observed from the Galactic disk. Therefore, whereas the EGRET observations alone do not prove that nuclear cosmic rays pervade the Galaxy, it is difficult to reconcile all the evidence solely in terms of electrons.

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