1. Armagh Observatory, College Hill, Armagh, BT61 9DG, N, Ireland 2. Astronomical Institute, Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynská dolina, 842 48, Bratislava 4, Slovakia
Abstract:
Solar Physics - Observational data clearly indicate the presence of 3-min oscillations in sunspots in spectral lines covering a vast temperature range from the low chromosphere to those lines...