Dr. Ding Yuan from University of Central Lancashire, Preston, UK
Time: 2016-10-20 10:00am
Place：208 south building
Title：Abnormal Oscillations associated with inhomogeneities in sunspots
Abstract：In this talk, I will presents sunspot oscillations and its applications in diagnosing the magnetic and thermal structure of a sunspot. In case of a sunspot with inhomogeneities, such as light bridges and stratification, the sunspot oscillations are modified significantly. The inhomogeneities have fine structures in contrast to axial-symmetric sunspots, therefore, their existence in a sunspot will affect the dynamic activities and could be used as a tool for exploring the fine structure of a sunspot. In the long term, the inhomogeneities plays an significant role in the evolution and morphology of a sunspot, which is a main determinant of explosive events in space weather.