| Presenter: | Jan Jurcak |
| Affiliation: | National Astronomical Observatory of Japan |
| Title: | Spectropolarimetric observations of the penumbra at 0.3'' with HINODE |
| Authors: | J. Jurcak, S. Tsuneta, L.R. Bellot Rubio, K. Ichimoto, Y. Katsukawa, Y. Suematsu, T. Shimizu, S. Nagata, T. Tarbell, B. Lites, D. Shine, A. Title |
| Form: | poster |
| Abstract: | We present a set of sunspot observations obtained with the spectropolarimeter onboard HINODE at various positions on the solar disc. The Stokes profiles emerging from the limb-side parts of the penumbra have been inverted in terms of one-component model atmospheres featuring arbitrary stratifications of the atmospheric parameters. This choice is motivated by the high angular resolution of 0.3'' attained by the observations. The retrieved stratifications are compared with those predicted by current models of penumbral fine structure, including the rising flux tube model and the field-free gap model. In the inner penumbra, regions with increased velocities and more inclined and weaker magnetic fields are found in bright areas around optical depth unity. The solution for the outer penumbra is less clear. However, the synthetic maps of NCP favour the resulting models of atmosphere with the stratifications of plasma parameters resembling the expected behaviour in and around penumbral flux tubes positioned approximately at optical depth $\log \tau = -1$. |
| Session: | 3. Nature of solar magnetic fields as revealed by polarimetry |
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