NOAA 11035 was a highly sheared active region that appeared in December 2009 early in the new activity cycle. The leading polarity sunspot developed a highly unusual feature in its penumbra, an opposite polarity pore with a strong magnetic field in excess of 3500 G along one edge, which persisted for several days during the evolution of the region. This region was well observed by both space- and ground-based observatories, including Hinode, FIRS, TRACE, and SOHO. These observations, which span wavelength and atmospheric regimes, provide a complete picture of this unusual feature which may constitute a force-free magnetic field in the photosphere which is produced by the reconnection of magnetic loops low in the solar atmosphere.
@article{arxiv.1504.01325,
title = {The Persistence of Apparent Non-Magnetostatic Equilibrium in NOAA 11035},
author = {Sarah A. Jaeggli},
journal= {arXiv preprint arXiv:1504.01325},
year = {2015}
}
Comments
To appear in proceedings of IAU Symposium 305: Polarimetry: From the Sun to Stars and Stellar Environments