Quasi-Periodic Hard X-Ray Pulsations in Solar Flares Based on RHESSI and Konus-Wind Data

Abstract

The results of the study of quasi-periodic hard X-ray pulsations in solar flares with respect to the spatial localization of emission sources based on data from the RHESSI spacecraft are presented. Three events (SOL 2002-04-21T01:15, SOL 2003-10-24T02:44, and SOL 2013-05-13T15:52), the hard X-ray of which exhibited quasi-periodic pulsations in local sources, are considered. All of the studied events are characterized by differences in the properties of quasi-periodic pulsations in the different sources. The local sources of each of the flares (SOL 2002-04-21T01:15 and SOL 2003-10-24T02:44) are characterized primarily by identical properties of quasi-periodic pulsations of the hard X-rays from different energy channels. The typical values of the periods of the found quasi-periodic pulsations are 20–70 s. In the local sources of the event SOL 2013-05-13T15:52, the pulsations with nonidentical characteristics are dominant at different hard X-ray energies. The values of the periods of found quasi-periodic pulsations are 10–30 s.