Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...613.1233m&link_type=abstract
The Astrophysical Journal, Volume 613, Issue 2, pp. 1233-1240.
Astronomy and Astrophysics
Astronomy
19
Sun: Flares, Sun: Particle Emission, Sun: X-Rays, Gamma Rays
Scientific paper
The cross section for bremsstrahlung photon emission in solar flares is, in general, a function of the angle θ between the incoming electron and the outgoing photon directions. Thus the electron spectrum required to produce a given photon spectrum is a function of this angle, which is related to the position of the flare on the solar disk and the direction(s) of the precollision electrons relative to the local solar vertical. We compare mean electron flux spectra for the flare of 2002 August 21 using cross sections for parameterized ranges of the angle θ. Implications for the shape of the mean source electron spectrum and for the injected power in nonthermal electrons are discussed.
Brown John C.
Emslie Gordon A.
Kontar Eduard P.
Massone Anna Maria
Piana Michele
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