| Issue |
A&A
Volume 499, Number 3, June I 2009
|
|
|---|---|---|
| Page(s) | 661 - 667 | |
| Section | Cosmology (including clusters of galaxies) | |
| DOI | https://doi.org/10.1051/0004-6361/200811272 | |
| Published online | 27 March 2009 | |
Analytic fitting formulae for relativistic electron-electron thermal bremsstrahlung
1
Josai Junior College, 1-1 Keyakidai, Sakado-shi, Saitama, 350-0295, Japan e-mail: snozawa@josai.ac.jp
2
Department of Physics, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo, 102-8554, Japan e-mail: n_itoh@sophia.ac.jp
Received:
1
November
2008
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
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