Study of the structures of the explosive events in the UV

Abstract

We analyze Si iv 139.37 um emission line during solar Explosive Events (EE) near the center of the solar disk with the aim to study the structure of the sources of EEs observed at the VUV. The observations were made by SUMER, on board SoHO, with a raster regime of six EW positions that allowed us to identify the times and EW, NS positions of the maximum amplitude of each EE. Based on one dimensional NS distributions at three different wavelengths (blue, central and red) for times around each maximum we have identified three different shapes of the sources. Also. It was found that the maximum at the blue wing is attained after the maxima, at red and central wavelengths.