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Title: 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, 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 ∼1000 K in the chromosphere and upper photosphere, along with co-spatial bi-directional Doppler shifting of 5–10 km s{sup −1}. This heating also extends along a nearby chromospheric fibril, which is co-spatial to 10–15 km s{sup −1} downflows. Strong magnetic flux cancellation is also apparent in one of the footpoints, and is concentrated in the chromosphere. This event more closely resembles that of an Ellerman Bomb, though placed slightly higher in the atmosphere than what is typically observed.

Authors:
; ;  [1];  [2];  [3]
  1. Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast, BT7 1NN, Northern Ireland (United Kingdom)
  2. Armagh Observatory and Planetarium, College Hill, Armagh, BT61 9DG (United Kingdom)
  3. Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2 (Ireland)
Publication Date:
OSTI Identifier:
22663239
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 845; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CALCIUM; CHROMOSPHERE; DOPPLER EFFECT; HEATING; MAGNETIC FLUX; PHOTOSPHERE; POLARIMETRY; SPECTRA; SPECTROSCOPY; SUN; SUNSPOTS; TELESCOPES

Citation Formats

Reid, A., Henriques, V., Mathioudakis, M., Doyle, J. G., and Ray, T., E-mail: aaron.reid@qub.ac.uk. Chromospheric Inversions of a Micro-flaring Region. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA7DE0.
Reid, A., Henriques, V., Mathioudakis, M., Doyle, J. G., & Ray, T., E-mail: aaron.reid@qub.ac.uk. Chromospheric Inversions of a Micro-flaring Region. United States. doi:10.3847/1538-4357/AA7DE0.
Reid, A., Henriques, V., Mathioudakis, M., Doyle, J. G., and Ray, T., E-mail: aaron.reid@qub.ac.uk. Sun . "Chromospheric Inversions of a Micro-flaring Region". United States. doi:10.3847/1538-4357/AA7DE0.
@article{osti_22663239,
title = {Chromospheric Inversions of a Micro-flaring Region},
author = {Reid, A. and Henriques, V. and Mathioudakis, M. and Doyle, J. G. and Ray, T., E-mail: aaron.reid@qub.ac.uk},
abstractNote = {We use spectropolarimetric observations of the Ca ii 8542 Å line, taken from the Swedish 1 m Solar Telescope, 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 ∼1000 K in the chromosphere and upper photosphere, along with co-spatial bi-directional Doppler shifting of 5–10 km s{sup −1}. This heating also extends along a nearby chromospheric fibril, which is co-spatial to 10–15 km s{sup −1} downflows. Strong magnetic flux cancellation is also apparent in one of the footpoints, and is concentrated in the chromosphere. This event more closely resembles that of an Ellerman Bomb, though placed slightly higher in the atmosphere than what is typically observed.},
doi = {10.3847/1538-4357/AA7DE0},
journal = {Astrophysical Journal},
number = 2,
volume = 845,
place = {United States},
year = {Sun Aug 20 00:00:00 EDT 2017},
month = {Sun Aug 20 00:00:00 EDT 2017}
}