Detection of emission in the Si I 1082.7 nm line core in sunspot umbraeD. Orozco Suárez, C. Quintero Noda, B. Ruiz Cobo, M. Collados Vera and T. FelipeA&A, 607 (2017) A102DOI: https://doi.org/10.1051/0004-6361/201731216
