The Analysis of Penumbral Fine Structure Using an Advanced Inversion Technique
Abstract
We present a method to study the penumbral fine structure using data obtained by the spectropolarimeter onboard HINODE. For the first time, the penumbral filaments can be considered as resolved in spectropolarimetric measurements. This enables us to use inversion codes with only one-component model atmospheres, and thus assign the obtained stratifications of plasma parameters directly to the penumbral fine structure. This approach is applied to the limb-side part of the penumbra in active region NOAA 10923. The preliminary results show a clear dependence of the plasma parameters on continuum intensity in the inner penumbra, i.e. weaker and horizontal magnetic field along with increased line-of-sight velocity are found in the low layers of the bright filaments. The results in the mid penumbra are ambiguous and future analyses are necessary to unveil the magnetic field structure and other plasma parameters there.
Cite
@article{arxiv.0707.1560,
title = {The Analysis of Penumbral Fine Structure Using an Advanced Inversion Technique},
author = {Jan Jurčák and Luis Bellot Rubio and Kiyoshi Ichimoto and Yukio Katsukawa and Bruce Lites and Shin'ichi Nagata and Toshifumi Shimizu and Yoshinori Suematsu and Theodore Tarbell and Alan Title and Saku Tsuneta},
journal= {arXiv preprint arXiv:0707.1560},
year = {2015}
}
Comments
7 pages, 6 figures, submitted to PASJ