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Temperature of Source Regions of 3He-Rich Impulsive Solar Energetic Particle Events

Published online by Cambridge University Press:  24 July 2018

N.-H. Chen Open the ORCID record for N.-H. Chen [Opens in a new window] ,
R. Bučík  and
R.-S. Kim
N.-H. Chen
Affiliation:
Korea Astronomy and Space Science Institute, Daejeon, Republic of Korea email: nhchen@kasi.re.kr
R. Bučík
Affiliation:
Institut für Astrophysik, Georg-August-Universität Göttingen, Göttingen, Germany Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany
R.-S. Kim
Affiliation:
Korea Astronomy and Space Science Institute, Daejeon, Republic of Korea email: nhchen@kasi.re.kr University of Science and Technology, Daejeon, Republic of Korea
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Abstract

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Impulsive solar energetic particle (SEP) events originate from the energy dissipation process in small solar flares. Anomalous abundances in impulsive SEP events provide an evidence on unique, yet unclear, acceleration mechanism. The pattern of heavy-ion enhancements indicates that the temperature of the source plasma that is accelerated is low and not flare-like. We examine the solar source of the 3He-rich SEP event of 2012 November 20 using Solar Dynamics Observatory (SDO)/ Atmospheric Imaging Assembly (AIA) images and investigate its thermal variation. The examined event is associated with recurrent coronal jets. The Differential Emission Measure (DEM) analysis is applied to study the temperature evolution/distribution of the source regions. Preliminary results show that the temperature of the associated solar source is ranged between 1.2-3.1 MK.

Keywords

Sun: UV radiationparticle emissioncorona
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S335: Space Weather of the Heliosphere: Processes and Forecasts , July 2017 , pp. 14 - 16
Copyright
Copyright © International Astronomical Union 2018 

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