Ulysses-Wind stereoscopic study of type III radiation pattern over a large latitude range.

Details Ulysses-Wind stereoscopic study of type III radiation pattern over a large latitude range. Ulysses-Wind stereoscopic study of type III radiation pattern over a large latitude range.

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh23a0346b&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SH23A-0346

Physics

7534 Radio Emissions

Scientific paper

Type III radio bursts are generated by suprathermal electrons, accelerated from solar active region and travelling outwards along open magnetic field lines to lower densities in the interplanetary medium (IPM). Along their path in the IPM, these electrons trigger radio emission at the fundamental (F) and/or harmonic (H) of the local plasma frequency fp. We have selected 278 type III bursts observed simultaneously by Wind and Ulysses spacecraft (s/c) during all the year 2001. Deriving radio sources trajectory by diffrent ways, we have deduced some type III characteristics and derived apparent radiation pattern at low frequencies over a large latitude range. First results confirm that radiation pattern shifts east when frequency decreases (Hoang et al. 1997). It brings new evidence of strong refraction effects in local density gradients.

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