Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-07-13
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.
Larsson Stefan
Poutanen Juri
Svensson Roland
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