A simple formula for the thermal pair annihilation line emissivity

Details A simple formula for the thermal pair annihilation line emissivity A simple formula for the thermal pair annihilation line emissivity

1996-07-13

arxiv.org/abs/astro-ph/9607069v1

Astronomy and Astrophysics

Astrophysics

4 pages; l-aa style; 2 postscript figures; Proceedings of 3rd Compton Gamma-Ray Observatory Symposium, Munich, 1995

Scientific paper

We introduce a simple and convenient fitting formula for the thermal
annihilation line from pair plasmas in cosmic sources. The fitting formula is
accurate to 0.04\% and is valid at all photon energies and temperatures of
interest. The commonly used Gaussian line profile is not a good approximation
for broader lines.

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