EDP Sciences
Science with Hinode
Press Release
Free access
Volume 481, Number 1, April I 2008
Science with Hinode
Page(s) L17 - L20
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20079021
Published online 25 January 2008

A&A 481, L17-L20 (2008)
DOI: 10.1051/0004-6361:20079021


Penumbral models in the light of Hinode spectropolarimetric observations

J. Jurcák1, 2 and L. R. Bellot Rubio1, 3

1  National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
    e-mail: jan.jurcak@nao.ac.jp
2  Astronomical Institute of the Academy of Sciences, Fricova 298, 25165 Ondrejov, Czech Republic
3  Instituto de Astrofísica de Andalucía (CSIC), Apdo. Correos 3004, 18080 Granada, Spain

(Received 8 November 2007 / Accepted 16 January 2008)

Aims.The realism of current models of the penumbra is assessed by comparing their predictions with the plasma properties of penumbral filaments as retrieved from spectropolarimetric observations.
Methods.The spectropolarimeter onboard Hinode allows us, for the first time, to distinguish the fine structure of the penumbra. Therefore, we can use one-component inversions to obtain the stratifications of plasma parameters in each pixel. The correlations between the plasma parameters and the continuum intensity are studied.
Results.We find that, in the outer penumbra, the stronger flows and higher values of magnetic field inclination tend to be located in dark filaments. This finding does not seem to be compatible with the scenario of a field-free gappy penumbra.

Key words: Sun: sunspots -- Sun: photosphere -- techniques: polarimetric

© ESO 2008