Probing the solar origin of energy build-up and release in solar energetic particles

AWASTHI ARUN KUMAR, awasthi@prl.res.in, Physical Research Laboratory, India
Jain Rajmal, rajmal@prl.res.in, Physical Research Laboratory
Bhatt Nipa, nijibhatt@hotmail.com, C. U. Shah Science College

Abstract
We study the temporal and spatial evolution of magnetic field parameters, and multi-wavelength observations of the AR 11226 and AR 11261, observed during 02-09 June 2011 and 31 July to 06 August 2011 respectively, to probe the origin of the associated solar energetic particles (SEPs). The X-ray observations by GOES and RHESSI reveal that the AR 11226 as well as AR 11261 has been most turbulent to produce flares greater than or equal to GOES C class. Most of the flares have accompanying CME and a few have SEPs. We restrict our study of magnetic field evolution of these two active regions to helio-longitudes E20-W90 in view of earlier investigations (Jain, 1986). The AR 11226 produced 28 flares (greater than or equal to GOES C class) and 8 CMEs and 5 SEPs. On the other hand, the AR 11261 produced 29 flares (greater than or equal to GOES C class), 8 CMEs and 5 SEPs. Our study preliminarily shows complex magnetic structure of beta and beta-gamma configuration respectively. We study the temporal evolution of magnetic field parameters viz. gradient, shear, rotation to probe the origin of the energy release in the flare and associated CME and SEP. In order to investigate the energy build-up and release in form of SEPs, we further study the dynamics in the chromopshere and corona employing observations in the other wavebands.