Toward a better understanding on particle acceleration in solar flares within the framework of the GEMSIS project

Details Toward a better understanding on particle acceleration in solar flares within the framework of the GEMSIS project Toward a better understanding on particle acceleration in solar flares within the framework of the GEMSIS project

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh41a0300m&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH41A-0300

Other

7509 Corona, 7519 Flares, 7524 Magnetic Fields, 7534 Radio Emissions, 7554 X-Rays, Gamma Rays, And Neutrinos

Scientific paper

GEMSIS (Geospace Environment Modeling System for Integrated Studies) is one of projects in Solar-Terrestrial Environment Laboratory, Nagoya University. Its final goal is to build a geospace-environment model based on various (satellite and ground-based) observational facts in order to understand the dynamic energy-transport- processes taking place in geospace. In the first 3-years from this year, we set a few individual scientific targets as fundamental elements/information for the final model. One of them is to know how the accelerated particles are accelerated and lose their energies in solar flares. Here, we briefly introduce our approach to this scientific target. Thanks to Yohkoh and RHESSI observations, some essentials (energy spectrum of accelerated electrons, acceleration site, time-scale of acceleration) for revealing the acceleration mechanism are somehow obtained. However, we don"t have any direct observations about pitch-angle distribution of accelerated electrons even though it is important information to identify the acceleration mechanism. In some flares, most of accelerated electrons are trapped in a magnetic loop system, and stay in the loop for a few minutes until they precipitate into the footpoint region due to pitch-angle scattering via collision. At that time, hard X-ray thin-target emission and microwave gyrosynchrotron emissions from trapped electrons are observed in the corona and mainly hard X-ray thick target emissions are observed at the footpoint region. The temporal behavior of spectrum and intensity of each source depends on the initial pitch-angle distribution of accelerated electrons. However, it also depends on other two parameters, i.e., the magnetic mirror efficiency and the plasma density in the loop. First we must determine these two parameters. In this paper, some preliminary results are introduced.

Affiliated with

Also associated with

No associations

Rating

Toward a better understanding on particle acceleration in solar flares within the framework of the GEMSIS project 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 Toward a better understanding on particle acceleration in solar flares within the framework of the GEMSIS project, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Toward a better understanding on particle acceleration in solar flares within the framework of the GEMSIS project will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1417480