A&A 369, 643- (2001)
Spectral signature of uncombed penumbral magnetic fields
CommentJ. Sánchez Almeida
Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain
(Received 11 December 2000 / Accepted 13 December 2000 )
The conservation of magnetic flux demands a magnetic field fine structure as small as 15 km to explain the net circular polarization observed in penumbrae (Sánchez Almeida 1998). A recent work by Martínez Pillet (2000) claims that modeling penumbrae as a collection of fluxtubes 100 km wide suffices. We identify several shortcomings of such modeling so that it is presently unclear whether it really contradicts the former conclusion.
Key words: Sun: magnetic fields -- sunspots
© ESO 2001