Journal
ASTROPHYSICAL JOURNAL
Volume 737, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/737/1/21
Keywords
methods: numerical; radiation mechanisms: general
Categories
Funding
- National Science Foundation [AST 00-93091, PHY 02-05155, AST 07-09246]
- Richard and Margaret Romano Professorial Scholarship
- Sony faculty fellowship
- University Scholar appointment
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Magnetobremsstrahlung (MBS) emission and absorption play a role in many astronomical systems. We describe a general numerical scheme for evaluating MBS emission and absorption coefficients for both polarized and unpolarized light in a plasma with a general distribution function. Along the way we provide an accurate scheme for evaluating Bessel functions of high order. We use our scheme to evaluate the accuracy of earlier fitting formulae and approximations. We also provide an accurate fitting formula for mildly relativistic (kT/(m(e)c(2)) greater than or similar to 0.5) thermal electron emission (and therefore absorption). Our scheme is too slow, at present, for direct use in radiative transfer calculations but will be useful for anyone seeking to fit emission or absorption coefficients in a particular regime.
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