Mapping the Magnetic Field of Flare Coronal Loops
Authors
Organisations
Type | Article |
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Original language | English |
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Article number | 126 |
Pages (from-to) | 1-12 |
Number of pages | 12 |
Journal | Astrophysical Journal |
Volume | 874 |
Issue number | 2 |
Early online date | 29 Mar 2019 |
DOI | |
Publication status | Published - 01 Apr 2019 |
Permanent link | Permanent link |
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Abstract
Here, we report on the unique observation of flaring coronal loops at the solar limb using high-resolution imaging spectropolarimetry from the Swedish 1 m Solar Telescope. The vantage position, orientation, and nature of the chromospheric material that filled the flare loops allowed us to determine their magnetic field with unprecedented accuracy using the weak-field approximation method. Our analysis reveals coronal magnetic field strengths as high as 350 G at heights up to 25 Mm above the solar limb. These measurements are substantially higher than a number of previous estimates and may have considerable implications for our current understanding of the extended solar atmosphere.
Keywords
- instrumentation: polarimeters, sun: chromosphere, sun: corona, sun: flares, sun: magnetic fields, techniques: polarimetric
Documents
- Mapping the Magnetic Field of Flare Coronal Loops
Final published version, 4.38 MB, PDF
Licence: CC BY Show licence