A simple formula for the thermal pair annihilation line emissivity
Astrophysics
2007-05-23 v1
Abstract
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.
Cite
@article{arxiv.astro-ph/9607069,
title = {A simple formula for the thermal pair annihilation line emissivity},
author = {Roland Svensson and Stefan Larsson and Juri Poutanen},
journal= {arXiv preprint arXiv:astro-ph/9607069},
year = {2007}
}
Comments
4 pages; l-aa style; 2 postscript figures; Proceedings of 3rd Compton Gamma-Ray Observatory Symposium, Munich, 1995