Journal
ASTRONOMY & ASTROPHYSICS
Volume 549, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201220373
Keywords
methods: observational; methods: numerical; Sun: magnetic topology; sunspots; techniques: polarimetric
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Funding
- Spanish Ministry of Economy and Competitiveness [AYA2010-18029]
- Ramon y Cajal fellowship
- Consolider-Ingenio project [CSD2009-00038]
- STFC [ST/H000429/1, PP/D002907/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/H000429/1, PP/D002907/1] Funding Source: researchfish
- UK Space Agency [ST/J001732/1] Funding Source: researchfish
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Aims. We study the presence of reversed polarity magnetic flux in sunspot penumbra. Methods. We applied a new regularized method to deconvolve spectropolarimetric data observed with the spectropolarimeter SP onboard Hinode. The new regularization is based on a principal component decomposition of the Stokes profiles. The resulting Stokes profiles were inverted to infer the magnetic field vector using SIR. Results. We find, for the first time, reversed polarity fields at the border of many bright penumbral filaments in the whole penumbra.
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