Chromospheric Inversions of a Micro-flaring Region

Abstract

We use spectropolarimetric observations of the Ca II 8542~Å line, taken from the Swedish 1-m Solar Telescope (SST), in an attempt to recover dynamic activity in a micro-flaring region near a sunspot via inversions. These inversions show localized mean temperature enhancements of $\sim$1000~K in the chromosphere and upper photosphere, along with co-spatial bi-directional Doppler shifting of 5 - 10 km s${}^{-1}$. This heating also extends along a nearby chromospheric fibril, co-spatial to 10 - 15 km s${}^{-1}$ down-flows. Strong magnetic flux cancellation is also apparent in one of the footpoints, concentrated in the chromosphere. This event more closely resembles that of an Ellerman Bomb (EB), though placed slightly higher in the atmosphere than is typically observed.

9 pages, 9 figures, accepted in ApJ. Movies are stored here: https://star.pst.qub.ac.uk/webdav/public/areid/Microflare/

References in corpus (12)

• CRISP Spectropolarimetric Imaging of Penumbral Fine Structure
• CRISPRED: A data pipeline for the CRISP imaging spectropolarimeter
• An Open Source, Massively Parallel Code for Non-LTE Synthesis and Inversion of Spectral Lines and Zeeman-induced Stokes Profiles
• The solar chromosphere at high resolution with IBIS. I. New insights from the Ca II 854.2 nm line
• 3D Temperature Mapping of Solar Photospheric Fine Structure Using Ca II H Filtergrams
• Spectral observations of Ellerman bombs and fitting with a two-cloud model
• Clusters of small eruptive flares produced by magnetic reconnection in the sun
• Observations and NLTE modeling of Ellerman bombs
• Evidence of Explosive Evaporation in a Microflare Observed by Hinode/EIS
• On The Relationship Between Magnetic Cancellation and UV Burst Formation
• Ellerman Bombs with Jets: Cause and Effect
• Solar Ellerman Bombs in 1-D Radiative Hydrodynamics