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Astron. Astrophys. 326, 417-418 (1997)
Research Note
On the use of nonrelativistic bremsstrahlung cross sections in astrophysics
Eberhard Haug
Institut für Astronomie und Astrophysik,
Universität Tübingen, Auf der Morgenstelle 10, D-72076
Tübingen, Germany (Telefax 07071/295889, e-mail:
haug@ait.physik.uni-tuebingen.de)
Received 27 February 1997 / Accepted 28 February 1997
Abstract
The nonrelativistic Bethe-Heitler cross section for bremsstrahlung often used in astrophysical applications is a poor approximation at initial electron energies above 30 keV. Therefore a simple formula is given which is accurate up to semirelativistic energies. An extension of this expression can be applied in the whole energy range.
Key words: radiation mechanisms: non-thermal
Contents
© European Southern Observatory (ESO) 1997
Online publication: April 20, 1998
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