HR: 0800h
AN: SH21B-0406    [Abstracts]
TI: Revisiting ISEE-3-Voyager Observations of Back-Side Type III Radio Bursts in View of the Stereo/Waves observations.
AU: * Bougeret, J
EM: jean-louis.bougeret@obspm.fr
AF: LESIA - UMR CNRS 8109, Observatoire de Paris, Meudon, F-92195 France
AU: Lecacheux, A
EM: alain.lecacheux@obspm.fr
AF: LESIA - UMR CNRS 8109, Observatoire de Paris, Meudon, F-92195 France
AU: Hoang, S
EM: sang.hoang@obspm.fr
AF: LESIA - UMR CNRS 8109, Observatoire de Paris, Meudon, F-92195 France
AU: Maksimovic, M
EM: milan.maksimovic@obspm.fr
AF: LESIA - UMR CNRS 8109, Observatoire de Paris, Meudon, F-92195 France
AB: In this paper, we revisit old observations of interplanetary type III radio bursts made simultaneously by the radio instruments on the ISEE-3 spacecraft and on the Voyager spacecraft, in view of the new opportunities offered by the Stereo mission.. Type III radio emission is produced by beams of supra-thermal electrons believed to be accelerated during the flare process and traveling along open interplanetary field lines. Their observation can help trace the large scale structure of the interplanetary medium. Lecacheux et al. (1989) analyzed the properties of such radio bursts originating behind the Sun as viewed from the Earth and still also observed by the ISEE-3 spacecraft located at the L1 libration point. Information on the beaming of the radiation can be deduced from these observations. Lecacheux et al. also measured anomalous delays in burst arrival time at one spacecraft relative to the other. These anomalous delays could be explained by the presence of both the fundamental and harmonic radiation modes with different beaming properties. Such an hypothesis can be checked by the Stereo/Waves observations. Finally, we discuss previous radio wave propagation models in the interplanetary medium and emphasize their importance for the interpretation of the radio observations. Lecacheux, A., J.-L. Steinberg, S. Hoang, and G. A. Dulk, Characteristics of type III bursts in the solar wind from simultaneous observations on board ISEE-3 and Voyager, Astron. Astrophys. 217, 237-250, 1989.
DE: 7534 Radio emissions
DE: 7847 Radiation processes
DE: 2134 Interplanetary magnetic fields
DE: 2164 Solar wind plasma
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2004 AGU Fall Meeting