Initiation and chromospheric effects of a M1.0 class solar flare from high-resolution multi-wavelength observations

Document Type

Conference Proceeding

Publication Date

1-1-2016

Abstract

Initiation and development of a M1.0 class flare of June 12, 2014, was observed by space and ground-based telescopes, including EUV and X-ray imaging spectroscopy by IRIS and RHESSI, and high-resolution optical imaging by 1.6m New Solar Telescope (NST). Analyzing the NST data, we found small-scale loop-like structures in the region of the magnetic field Polarity Inversion Line (PIL), the emergence and interaction of which caused photospheric brightenings temporarily coinciding with hard X-ray impulses. Detailed studies of the PIL region reveal signatures of photospheric plasma downflows and dissipation of electric currents. The reconstructed magnetic field topology shows a bundle of lines connecting the PIL region with the flare ribbons which were places of chromospheric evaporation observed by IRIS. The observations suggest a scenario with the primary energy release processes located in the low atmospheric layers of the PIL, energizing the overlying large-scale magnetic structure and causing "gentle" chromospheric evaporation.

Identifier

85029957512 (Scopus)

Publication Title

Proceedings of the International Astronomical Union

External Full Text Location

https://doi.org/10.1017/S1743921317003994

e-ISSN

17439221

ISSN

17439213

First Page

103

Last Page

108

Volume

12

Grant

AGS-1250818

Fund Ref

National Science Foundation

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