Analytic fitting formulae for relativistic electron-electron thermal bremsstrahlung
Josai Junior College, 1-1 Keyakidai, Sakado-shi, Saitama, 350-0295, Japan e-mail: firstname.lastname@example.org
2 Department of Physics, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo, 102-8554, Japan e-mail: email@example.com
Accepted: 18 February 2009
We present accurate analytic fitting formulae for electron-electron thermal bremsstrahlung emissivity. The fitting formulae have an overall accuracy of higher than 0.5% for a wide electron temperature range 1 keV ≤ ≤ 7 MeV, which will be useful when analyzing the precision observational data from the non-relativistic regime to mildly-relativistic regime. Assuming the thermal plasma, the present formulae will be also applicable to the relativistic regime.
Key words: cosmology: theory / galaxies: clusters: general / radiation mechanisms: thermal / relativity / X-rays: galaxies: clusters
© ESO, 2009