Mapping the Magnetic Field of Flare Coronal Loops

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...

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Bibliographic Details
Published in:The Astrophysical journal 2019-04, Vol.874 (2), p.126
Main Authors: Kuridze, D., Mathioudakis, M., Morgan, H., Oliver, R., Kleint, L., Zaqarashvili, T. V., Reid, A., Koza, J., Löfdahl, M. G., Hillberg, T., Kukhianidze, V., Hanslmeier, A.
Format: Article
Language:English
Subjects:
Approximation method
Astrophysics
Coronal loops
Coronal magnetic fields
Image resolution
instrumentation: polarimeters
Magnetic fields
Mapping
Solar atmosphere
Solar corona
Solar limb
Solar magnetic field
Sun: chromosphere
Sun: corona
Sun: flares
Sun: magnetic fields
techniques: polarimetric
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Summary: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.
ISSN:0004-637X
1538-4357
1538-4357
DOI:10.3847/1538-4357/ab08e9