Positron annihilation in the Milky Way

Details Positron annihilation in the Milky Way Positron annihilation in the Milky Way

Nov 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sf2a.conf..269p&link_type=abstract

"SF2A-2008: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: C. Charbonnel, F. Combes

Astronomy and Astrophysics

Astrophysics

Scientific paper

I review our current understanding of positron sources in the Galaxy, on the basis of the reported properties of
the observed 511 keV annihilation line. It is argued here that most of the disk positrons propagate away fom the disk (due to the low density environment) and the resulting low surface brightness annihilation emission is currently undetectable by SPI/INTEGRAL. It is also argued that a large fraction of the disk positrons may be transported via the regular magnetic field of the Galaxy into the bulge and annihilate there. These ideas may alleviate current difficulties in interepreting INTEGRAL results.

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