Prospects and requirements for measurements of extragalactic γ-ray lines

Details Prospects and requirements for measurements of extragalactic γ-ray lines Prospects and requirements for measurements of extragalactic γ-ray lines

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005exa....20...23g&link_type=abstract

Experimental Astronomy, Volume 20, Issue 1-3, pp. 23-30

Astronomy and Astrophysics

Astronomy

2

Extragalactic, Gamma-Rays, Agn, Clusters Of Galaxies

Scientific paper

A brief summary is presented of requirements for the measurements of extragalactic γ-ray lines. The electron-positron annihilation line at 511 keV represents the best prospect, and although this line is greatly broadened in active galactic nuclei, a narrow line should be present in clusters of galaxies and radio lobes as a result of prior AGN activity. The strongest fluxes should be of the order of 10-4 photons cm-2 s-1 from the closest extended sources.

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