Energetic Particle Observations and Propagation in the Three-dimensional Heliosphere During the 2006 December Events

Details Energetic Particle Observations and Propagation in the Three-dimensional Heliosphere During the 2006 December Events Energetic Particle Observations and Propagation in the Three-dimensional Heliosphere During the 2006 December Events

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...704..469m&link_type=abstract

The Astrophysical Journal, Volume 704, Issue 1, pp. 469-476 (2009).

Astronomy and Astrophysics

Astronomy

4

Sun: Coronal Mass Ejections: Cmes, Sun: Flares, Sun: Magnetic Fields, Sun: Particle Emission, Solar Wind

Scientific paper

We report observations of solar energetic particles obtained by the HI-SCALE and COSPIN/LET instruments onboard Ulysses during the period of isolated but intense solar activity in 2006 December, in the declining phase of the solar activity cycle. We present measurements of particle intensities and also discuss observations of particle anisotropies and composition in selected energy ranges. Active Region 10930 produced a series of major solar flares with the strongest one (X9.0) recorded on December 5 after it rotated into view on the solar east limb. Located over the South Pole of the Sun, at >72°S heliographic latitude and 2.8 AU radial distance, Ulysses provided unique measurements for assessing the nature of particle propagation to high latitudes under near-minimum solar activity conditions, in a relatively undisturbed heliosphere. The observations seem to exclude the possibility that magnetic field lines originating at low latitudes reached Ulysses, suggesting either that the energetic particles observed as large solar energetic particle (SEP) events over the South Pole of the Sun in 2006 December were released when propagating coronal waves reached high-latitude field lines connected to Ulysses, or underwent perpendicular diffusion. We also discuss comparisons with energetic particle data acquired by the STEREO and Advanced Composition Explorer in the ecliptic plane near 1 AU during this period.

Affiliated with

Also associated with

No associations

Rating

Energetic Particle Observations and Propagation in the Three-dimensional Heliosphere During the 2006 December Events does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Energetic Particle Observations and Propagation in the Three-dimensional Heliosphere During the 2006 December Events, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energetic Particle Observations and Propagation in the Three-dimensional Heliosphere During the 2006 December Events will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-805380