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X-rays and Gamma-rays from active galaxiesPhoton-photon pair production in active galaxies is considered, and the concept of the annihilation efficiency, the efficiency of the conversion of continuum luminosity of greater than 511 keV into positron annihilation luminosity, is introduced. Equations that give the source's annihilation luminosity and 511-keV flux as a function of its size, continuum luminosity and distance are developed. These are applied to the available X-ray and gamma-ray data on active galaxies in order to make specific predictions. Efficiencies as high as over 6 percent and fluxes up to 0.0008 ph/sq cm s result. While the latter are below present limits, they are within the reach of advanced instruments now in development.
Document ID
19850049153
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Matteson, J. L.
(California, University La Jolla, CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1983
Subject Category
Astrophysics
Meeting Information
Meeting: Positron-electron pairs in astrophysics
Location: Greenbelt, MD
Start Date: January 6, 1983
End Date: January 8, 1983
Accession Number
85A31304
Funding Number(s)
CONTRACT_GRANT: NAGW-449
CONTRACT_GRANT: NGL-05-005-003
Distribution Limits
Public
Copyright
Other

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