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Small electron acceleration episodes in the solar corona View all abstracts by submitter

Prasad Subramanian   Submitted: 2017-06-14 00:06

We study the energetics of nonthermal electrons produced in small acceleration episodes in the solar corona. We carried out an extensive survey spanning 2004-2015 and shortlisted 6 impulsive electron events detected at 1 AU that was not associated with large solar flares(GOES soft X-ray class > C1) or with coronal mass ejections. Each of these events had weak, but detectable hard Xray (HXR) emission near the west limb, and were associated with interplanetary type III bursts. In some respects, these events seem like weak counterparts of "cold/tenuous" flares. The energy carried by the HXR producing electron population was ≈1023 - 1025 erg, while that in the corresponding population detected at 1 AU was ≈1024-1025 erg. The number of electrons that escape the coronal acceleration site and reach 1 AU constitute 6 % to 148 % of those that precipitate downwards to produce thick target HXR emission.

Authors: Tomin James, Prasad Subramanian, Eduard P Kontar
Projects: RHESSI

Publication Status: Accepted, Monthly Notices of the Royal Astronomical Society
Last Modified: 2017-06-14 10:01
Go to main E-Print page  Investigation of Relationship Between High-Energy X-ray Sources and Photospheric and Helioseismic Impacts of X1.8 Solar Flare of October 23, 2012  Detection and Interpretation Of Long-Lived X-Ray Quasi-Periodic   Pulsations in the X-Class Solar Flare On 2013 May 14  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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