J/A+A/574/A37 Movies of 2012-10-16 solar flare (Dalmasse+, 2015)
Can we explain atypical solar flares?
Dalmasse K., Chandra R., Schmieder B., Aulanier G.
<Astron. Astrophys. 574, A37 (2015)>
=2015A&A...574A..37D 2015A&A...574A..37D
ADC_Keywords: Sun
Keywords: Sun: flares - Sun: corona - Sun: filaments, prominences -
Sun: magnetic fields - magnetic reconnection
Abstract:
We used multiwavelength high-resolution data from ARIES, THEMIS, and
SDO instruments to analyze a non-standard, C3.3 class flare produced
within the active region NOAA 11589 on 2012 October 16. Magnetic flux
emergence and cancellation were continuously detected within the
active region, the latter leading to the formation of two filaments.
Our aim is to identify the origins of the flare taking the complex
dynamics of its close surroundings into account.
We analyzed the magnetic topology of the active region using a linear
force-free field extrapolation to derive its 3D magnetic configuration
and the location of quasi-separatrix layers (QSLs), which are
preferred sites for flaring activity. Because the active region's
magnetic field was nonlinear force-free, we completed a parametric
study using different linear force-free field extrapolations to
demonstrate the robustness of the derived QSLs.
Description:
Part of the observations of NOAA 11589 presented here were obtained
with the Atmospheric Imaging Assembly imager (AIA) and the
Helioseismic and Magnetic Imager (HMI) onboard the Solar Dynamic
Observatory (SDO) satellite. The AIA instrument observes the Sun over
a wide range of temperatures from the photosphere to the corona. The
pixel size of the AIA images is 0.6". In this study, we considered the
1600, 304, 193, and 171Å data. The magnetic field in the AR was
studied by using the line-of-sight magnetograms of the HMI instrument,
which observes the full disk with a pixel size of 0.5".
We also used ground-based observations of the AR obtained with the
Indian telescope from the Aryabhatta Research Institute of
observational Sciences (ARIES) and with the French Telescope
Heliographique pour l'Etude du Magnetisme et des Instabilites
Solaires (THEMIS). The 15-cm f/15 Coude telescope of the ARIES,
operating in Nainital (India), observes in the Hα line with a
spatial resolution of 0.58". The THEMIS telescope, operating in
Tenerife (Canary Islands), allows a simultaneous mapping of the
Hα emission and the full Stokes parameters in the Fe 6302.5Å
of a field of view of about 240"x100" in one hour.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 137 3 List of movies
movies/* . 3 Individual movies
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 36 A36 --- FileName Name of the file in subdirectory movies
38-137 A100 --- Title Title of the file
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Acknowledgements:
Kevin Dalmasse, kevin.dalmasse(at)obspm.fr
(End) Patricia Vannier [CDS] 22-Jan-2015