COMPTEL spectral study of the inner galaxy

Details COMPTEL spectral study of the inner galaxy COMPTEL spectral study of the inner galaxy

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..410.1074b&link_type=abstract

The fourth compton symposium. AIP Conference Proceedings, Volume 410, pp. 1074-1078 (1997).

Computer Science

6

Galactic Center, Bar, Circumnuclear Matter, And Bulge, Gamma-Ray Sources, Gamma-Ray Bursts, Gamma-Ray

Scientific paper

We present first steps towards fine-resolution COMPTEL spectra of the galactic γ-ray glow at 0.75-30 MeV, combining all data from the first 5 years of the mission. The spectra are not fully deconvolved yet. We show that there is evidence for deviations from a smooth continuum spectrum in the inner-Galaxy emission. Two broad spectral excesses seem to be present, namely below the 26Al 1.8 MeV line down to ~1.3 MeV and at 3-7 MeV, each containing a flux of the order 10-4 γ cm-2 s-1 rad-1. We find that the excess emission appears to have a rather wide latitude distribution. The spectral features suggest the presence of nuclear deexcitation lines as a possible explanation.

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