| Issue |
A&A
Volume 549, January 2013
|
|
|---|---|---|
| Article Number | L4 | |
| Number of page(s) | 4 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361/201220373 | |
| Published online | 12 December 2012 | |
Returning magnetic flux in sunspot penumbrae
1 Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain
e-mail: brc@iac.es
2 Departamento de Astrofísica, Universidad de La Laguna, 38205 La Laguna, Tenerife, Spain
Received: 12 September 2012
Accepted: 24 November 2012
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.
Key words: methods: observational / methods: numerical / Sun: magnetic topology / sunspots / techniques: polarimetric
© ESO, 2012
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