On the Massive Star Origin of 26Al in the Cygnus Region
S.Plüschke, R.Diehl, U.Wessolowski
The COMPTEL map of the 1.809 MeV line, attributed to the radioactive decay of
26Al, shows significant excess emission in the Cygnus region. We present
an analysis of this emission using COMPTEL data accumulated over eight years.
Previous studies suggested that this flux is due to the integrated, but unresolved,
nucleosynthesis from young, massive objects like Wolf-Rayet stars and core collapse
supernovae. Beyond the known WR stars and SNRs we also include OB-associations
to model the Cygnus region. We carry out population synthesis studies to
determine the time dependend production of 26Al and also kinetic as well
as radiative energy. We compare various outputs of our OB-association model with
recent measurements in the Cygnus region. Furthermore we consider the impact of
enhanced 26Al yields that can occur in a fraction of massive, close binary systems.
File translated from TEX by TTH, version 2.32.
On 16 Jul 1999, 09:19.