ASTRONOMY AND ASTROPHYSICS

• Main Authors: B. Drolias, M. Fraenz, A. Korth, M. K. Reuss, B. Blake, J. J. Quenby
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1996
• Subjects: South Pole; South pole
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.388.2762; http://aa.springer.de/papers/6316002/2300464.pdf

Abstract. We report on observations of energetic particles (EP) during the ascent of ULYSSES to the south pole, on the fast pass from south to north and in the first few months after the north polar pass. After it left the ecliptic plane the spacecraft moved periodically into a corotating (26 days period) fast solar wind stream and observed the accelerated EP associated with the forward and reverse shocks. Such particles were observed up to 68 ◦ in heliographic latitude. Only when ULYSSES returned to lower latitudes did the accelerated beams reappear. The fast pass from south to north polar regions showed on a compressed timescale similar features to those already observed on the ascending part. Apparently the recurrence period of the EP did not change throughout that pass. No evidence for differential rotation could be found in our data. The north polar pass again did not show energetic particles to be present at such high latitudes.