Hamish Reid
Gather.town id
SP01
Poster Title
Possible microwave sources of type III noise storms on 10th April 2019
Abstract (short summary)
Particle acceleration can occur continuously over active regions, with keV electrons producing radio Type III noise storms from hours to days. What is not clear is whether all the particles escape the solar atmosphere, or whether some are confined to the corona with the MeV energy required to produce gyrosynchrotron emission. The type III noise storm observed by LOFAR on 10th April 2019 was followed by series of microflares detected within the 4-8 GHz range by Siberian Radioheliograph. We present the preliminary results of the study of the relationship between activity in microwave and radio ranges. We carried out the analysis of the quasiperiodicity observed in both frequency ranges and used data in MW and EUV for finding the possible source of the type III bursts.
Plain text (extended) Summary
Our primary information source on accelerated electrons in the solar corona are radio waves generated via GHz gyrosynchrotron emission by electrons in confined coronal loops and via MHz type III bursts by electrons travelling out from the Sun. Despite their complementarynature the escape and trapping of flare-accelerated electrons have never been simultaneous analysed using radio imaging spectroscopy. We have combined type III bursts detected by LOw Frequency ARray (LOFAR) imaging spectroscopy and simultaneous gyrosynchrotron emission arising from trapped electrons during these events using the Siberian RadioHeliograph 48 (SRH) data. Analysing a Type III storm on April 10th 2019, we found quasi-periodic pulses with a period of 30-40 seconds that was common between the LOFAR and SRH data sets. This suggests a possible common physical mechanism that accelerates the particles responsible for the escaping and trapped energetic electrons.
URL
hamish.reid@ucl.ac.uk
Poster file