COMPTEL 1.8 MeV All Sky Survey: The Cygnus Region
S.Plüschke, R.Diehl, V.Schönfelder, G.Weidenspointner
We present an updated version of COMPTEL's 1.809 MeV sky survey. Based on eight
years of observations we compare results from different imaging techniques using
background from adjacent energy bands. We confirm the previously reported
characteristics of the galactic 1.809 MeV emission, specifically excesses in
regions away from the inner Galaxy. Because this gamma ray line is due to the
decay of radioactive 26Al, predominantly synthesized in massive stars,
one anticipates flux enhancements aligned with regions of recent star formation.
This is born out by the observations. In particular the Cygnus feature, first
presented in 1996 based on three years of COMPTEL data, is confirmed. Based on
the stellar population we distinguish three prominent areas in this region, for
which we separatly derive fluxes, and discuss interpretations.
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On 16 Jul 1999, 09:19.