A distribution for the galactic 26Al and e+e− line emissions

A distribution for the galactic gamma‐ray line emissions at 1809 keV and 511 keV is proposed. It is suggested that both the diffuse 26Al and the e+e− emission are reflected by the distribution of thin hot plasma as derived from X‐ray observations of the galactic ridge. The distribution consists of a flat galactic distribution with enhanced features at l=±25° and a dominant narrow peak at the Galactic Center containing a third of the total emission in the central radian. This hypothesis is substantiated by the existing 26Al detections and most of the observations at 511 keV. Evidence for a connection between thin hot plasma and gamma‐ray line emission is presented: The relevant nucleosynthesis‐processes infer explosive escape of the 26Al from the dense high temperature regions of fast production and decay—as in disruption of stars (supernovae) or strong stellar winds (eg. Wolf‐Rayet stars). In either of the cases the mechanical energy of the emanating shock front is transformed into thermal energy, leading...