Multi-point Observation of SEP Events: Longitudinal and Radial Effects

Details Multi-point Observation of SEP Events: Longitudinal and Radial Effects Multi-point Observation of SEP Events: Longitudinal and Radial Effects

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh33d..02l&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH33D-02

Physics

[2101] Interplanetary Physics / Coronal Mass Ejections, [2111] Interplanetary Physics / Ejecta, Driver Gases, And Magnetic Clouds, [2114] Interplanetary Physics / Energetic Particles, [7984] Space Weather / Space Radiation Environment

Scientific paper

The rising phase of solar cycle 24 has been providing multiple examples of solar energetic particle (SEP) events observed not only by spacecraft well separated in heliolongitude (e.g., STEREO, ACE) but also by the MESSENGER spacecraft moving toward, and later in, orbit around Mercury at heliocentric distances ranging from 0.3 to 0.4 AU. Two of the largest events observed so far (18 August 2010 and 4 June 2011) occurred when STEREO-A and MESSENGER were to a good approximation magnetically connected to the same region of the Sun. This nominal connection between both spacecraft allows us to analyze radial gradients of SEP intensities along field lines. A lower limit for the gradient of the SEP peak intensities along the same magnetic field line can be inferred from these observations. Similarly, during the decay phase of the events, periods of similar intensities are observed by both spacecraft, indicating that there is a null gradient of SEP intensities along a field line, i.e., they both were observing an energetic particle "reservoir" at different helioradii. Observations of radial intensity gradients and energetic particle reservoirs made by the Helios spacecraft during solar cycle 21 provide an important point of comparison.

Affiliated with

Also associated with

No associations

Rating

Multi-point Observation of SEP Events: Longitudinal and Radial Effects 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 Multi-point Observation of SEP Events: Longitudinal and Radial Effects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-point Observation of SEP Events: Longitudinal and Radial Effects will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-879034