Major Electron Events and Coronal Magnetic Configurations of the Related Solar Active Regions

Details Major Electron Events and Coronal Magnetic Configurations of the Related Solar Active Regions Major Electron Events and Coronal Magnetic Configurations of the Related Solar Active Regions

Sep 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...720l..36l&link_type=abstract

The Astrophysical Journal Letters, Volume 720, Issue 1, pp. L36-L40 (2010).

Astronomy and Astrophysics

Astronomy

3

Magnetic Fields, Sun: Flares, Sun: Particle Emission

Scientific paper

A statistical survey of 26 major electron events during the period 2002 February through the end of solar cycle 23 is presented. We have obtained electron solar onset times and the peak flux spectra for each event by fitting to a power-law spectrum truncated by an exponential high-energy tail, i.e., f(E) ˜ E^{-δ}e^{-E/E_{0}}. We also derived the coronal magnetic configurations of the related solar active regions (ARs) from the potential-field source-surface model. It is found that (1) 10 of the 11 well-connected open field-line events are prompt events whose solar onset times coincide with the maxima of flare emission and 13 of the 14 closed field-line events are delayed events. (2) A not-well-connected open field-line event and one of the closed field-line events are prompt events, they are both associated with large-scale coronal disturbances or dimming. (3) An averaged harder spectrum is found in open field-line events compared with the closed ones. Specifically, the averaged spectral index δ is of 1.6 ± 0.3 in open field-line events and of 2.0 ± 0.4 in closed ones. The spectra of three closed field-line events show infinite rollover energies E 0. These correlations clearly establish a significant link between the coronal magnetic field-line topology and the escape of charged particles from the flaring ARs into interplanetary space during the major solar energetic particle events.

Affiliated with

Also associated with

No associations

Rating

Major Electron Events and Coronal Magnetic Configurations of the Related Solar Active Regions 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 Major Electron Events and Coronal Magnetic Configurations of the Related Solar Active Regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Major Electron Events and Coronal Magnetic Configurations of the Related Solar Active Regions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1558208