CORONAL LOOPS ABOVE A SUNSPOT REGION

By analysing the data of Yohkoh soft X-ray images, vector magnetograms and 2D spectral observations. coronal loops above a large sunspot on 16-19 May 1994 have been studied. It is shown that the loops follow ge nerally the alignment of concentrated magnetic Aux. The results indica te that the soft X-ray emission is low just above the sunspot, while s ome loops connecting regions with opposite magnetic polarities show st rong soft X-ray emission. Especially, the part of the loops near the w eaker magnetic field region tends to be brighter than the one near the stronger magnetic field. The temperature around the top of the loops is typically similar to 3 x 10(6) K, which is higher than that at the legs of the loops by a factor of 1.5-2.0. The density near the top of the loops is about 5 x 10(9) cm(-3), which is higher than that of the leg parts of the loops. These loops represent probably the sites where strong magnetic flux and/or current are concentrated.