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

Published online by Cambridge University Press:  18 July 2013

Arun Kumar Awasthi ,
Rajmal Jain  and
Nipa J. Bhatt
Arun Kumar Awasthi*
Affiliation:
Physical Research Laboratory, India
Rajmal Jain
Affiliation:
Physical Research Laboratory, India
Nipa J. Bhatt
Affiliation:
C. U. Shah Science College, India
*
*email: [email protected]
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Abstract

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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 magnetic-field toplogy of both ARs shows complex magnetic structure of β and βγ configuration. 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 accompanying CMEs and SEPs. We restrict our study of magnetic field evolution of ARs to helio-longitudes E20-W70. The AR 11226 produced 28 flares (⩾ GOES C-class) and 8 CMEs as well as 5 SEPs. On the other hand, the AR 11261 produced 29 flares (⩾ GOES C class), 8 CMEs as well as 5 SEPs. 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. We do not find convincing relationship in view of predicting SEPs.

Keywords

Sun: flaresX-ray: flaresSun: coronal mass ejections (CMEs)Sun: particle emissionSun: magnetic fields
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S294: Solar and Astrophysical Dynamos and Magnetic Activity , August 2012 , pp. 539 - 540
Copyright
Copyright © International Astronomical Union 2013 

References

Jain, R. 1986, MNRAS, 223, 877 CrossRefGoogle Scholar
Bhatt, N. J. 2011, Study of Solar Activity and Its Impact on Terrestrial Event, PhDT, p. 361 Google Scholar
Jain, R., Awasthi, A. K., Chandel, B., Bharti, L., Hanaoka, Y., & Kiplinger, A. L. 2011, Solar Phys., 271, 57 CrossRefGoogle Scholar