The Interface Region Imaging Spectrograph (IRIS) mission provides high-resolution observations of the chromosphere and transition region. We try to determine whether the light walls exist somewhere else in active regions besides light bridges. Employing half-year high tempo-spatial data from the IRIS, we find lots of light walls either around sunspots or above light bridges. For the first time, we report one light wall near an umbral-penumbral boundary and another along a neutral line between two small sunspots. These new observations reveal that these light walls are multi-layer and multi-thermal structures which occur along magnetic neutral lines in active regions.
@article{arxiv.1604.00485,
title = {Light Walls Around Sunspots Observed by the Interface Region Imaging Spectrograph},
author = {Y. J. Hou and T. Li and S. H. Yang and J. Zhang},
journal= {arXiv preprint arXiv:1604.00485},
year = {2016}
}
Comments
4 pages, 4 figures, Accepted for publication in A&A Letters