Ulysses observations of a coronal origin particle event at 32° south heliographic latitutde
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A remarkable streaming beam-like particle event of 60 keV-5 MeV ions and of 38–315 keV electrons has been reported previously. This event has been associated with the passage of a Coronal Mass Ejection (CME) over the Ulysses spacecraft on June 9–13, 1993. At this time, the spacecraft was located at 4.6 AU from the sun and at an heliolatitude of 32° south. It was proposed (Armstrong et al., 1994) that the particle injection source could have been of coronal origin. In this study, we analyse the solar activity during this period. We identify a region of solar radio noise storms in the corona and in particular, a flare on June 7 that presents all the required characteristics to produce the hot plasma beam observed in the interplanetary medium.
KeywordsFlare Solar Activity Coronal Mass Ejection Solar Radio Interplanetary Medium
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- Anderson, K.A. et al.: 1991,Geophys. Res. Lett. 19, 1283.Google Scholar
- Armstrong, T.P. et al.: 1994, submitted toGeophys. Res. Lett. Google Scholar
- Buttighoffer, A. et al.: 1994, submitted toJ. Geophys. Res. Google Scholar
- Gosling, J. T. et al.: 1993,Geophys. Res. Lett. vol. 21, no.3, 237–240.Google Scholar
- Kerdraon, A. et al.: 1983,Astrophys. J. Lett. 265, L19-L21.Google Scholar
- Lantos, P. et al.: 1981,Astron. Astrophys. 101, 33–38.Google Scholar
- Lanzerotti, L. J. et al.: 1992,Astron. Astrophys. Suppl. Ser. 92, 207.Google Scholar
- Mangeney, A. et al.: 1994,Astron. Astrophys. 283, 982.Google Scholar
- The Radioheliograph group: 1993,Adv. Space Res. vol. 13 no.9, 411–414.Google Scholar
- Stone, R. G. et al.: 1992,Astron. Astrophys. Suppl. Ser. 92, 207.Google Scholar
- Tsuneta, S. et al.: 1991,Sol. Phys. 136, 37–67.Google Scholar