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The Galactic Positron Annihilation Radiation & The Propagation of Positrons in the Interstellar Medium

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arxiv 0711.3008 v3 pith:DM2IKOX5 submitted 2007-11-19 astro-ph

J. C. Higdon (Claremont Colleges) , R. E. Lingenfelter (UCSD) , R. E. Rothschild (UCSD) This is my paper · ORCID
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keywords galacticinterstellarmediumpositronsannihilationfeaturespositronpropagation
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We consider positron propagation in the interstellar medium and show that the positrons from the beta-plus decay chains of the radioactive nuclei Ni-56, Ti-44, and Al-26, produced in Galactic supernovae, can fully account for all the features of the diffuse Galactic 511 keV annihilation radiation observed by INTEGRAL/SPI. We also predict additional measurable features that can further test the origin of positrons and provide new information on the nature of the interstellar medium.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Relaxation of Energy Constraints for Positrons Generating the Galactic Annihilation Signal

    astro-ph.HE 2025-06 conditional novelty 6.0 of 10

    A full forward model of INTEGRAL, COMPTEL, and EGRET data relaxes the upper limit on positron injection energy for the Galactic 511 keV signal from a few MeV to roughly 40-60 MeV.

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