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| Titel |
Relations between X-ray emissions, magnetic fields and electric currents during the X2.2 flare on the 15 February 2011 |
| VerfasserIn |
Sophie Musset, Nicole Vilmer, Véronique Bommier |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250086456
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| Publikation (Nr.) |
 EGU/EGU2014-325.pdf |
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| Zusammenfassung |
| The energy released during solar flares is believed to be stored in non-potential magnetic
fields associated with electric currents. The aim of this paper is to study the relation between
the location of the X-ray emissions produced by energetic electrons accelerated in the corona,
the magnetic fields and the vertical current densities from measurements in the photosphere,
during the X2.2 flare on the 15 February 2011 (AR NOAA 11158). We created X-ray
images with the data from the Reuven Ramaty High Energy Solar Spectroscopic
Imager (RHESSI) to overlay them on magnetic field maps and current density maps
calculated with the UNNOFIT inversion and Metcalf disambiguation codes from
the spectropolarimetric measurements of the Helioseismic and Magnetic Imager
(HMI) on the Solar Dynamics Observatory (SDO). We conclude that the X-rays
emitted by thermal and non-thermal electrons during the flare are located above or
very close to the photospheric current sheet. A comparison between X-ray and
Extreme Ultraviolet (EUV) images from the SDO Atmospheric Imaging Assembly
(AIA) and a spectral analysis of the X-ray emission complete the study of the flare. |
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