Transition to solar minimum at high solar latitudes: Energetic particles from corotating interaction regions

Details Transition to solar minimum at high solar latitudes: Energetic particles from corotating interaction regions Transition to solar minimum at high solar latitudes: Energetic particles from corotating interaction regions

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30suly8h&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 19, pp. ULY 8-1, CiteID 8034, DOI 10.1029/2003GL017138

Astronomy and Astrophysics

Astrophysics

2

Solar Physics, Astrophysics, And Astronomy: Energetic Particles (2114), And Astronomy: Coronal Mass Ejections, And Astronomy: Corona, And Astronomy: Magnetic Fields

Scientific paper

One of the key questions to be addressed during the solar maximum phase of the Ulysses mission has been the nature of the ubiquitous energetic particle populations observed at all helio-latitudes from equator to poles. During the current, post-maximum phase of its mission, Ulysses has encountered the return to more stable solar wind, high speed stream structure, leading to the formation of stream and/or corotating interaction regions, in addition to the coronal mass ejection associated transients. The analysis reported here presents the identification of the first CIR after the recent solar maximum recorded by Ulysses COSPIN/LET at high helio-latitudes based on energetic particle composition data recorded in the ~5-30 MeV/n range. The recurrent compression region appears during 3-6 solar rotations in 2002 and is observed from ~52°N to ~37°N heliographic latitude at heliocentric distances from ~3.1 AU to ~3.8 AU.

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