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29-08-2018
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LOFAR Interferometric Observation of a group of Type III Solar Radio Bursts.

Submitter: Anshu Kumari
Description: Using the interferometric and beam formed capabilities of LOFAR, we analysed the propagation of a group of Type III radio bursts observed on 30 March 2018, in the height range from ~1.5 Rsun to ~4 Rsun in the solar corona, which corresponds to the harmonic plasma frequency emission from 80 to 20 MHz. Taking advantage of the interferometric high spectral and temporal resolution of LOFAR ( 160 ms / 196 kHz ), we were able to distinguish five different paths of propagation for the electron beams in the type III group.

In addition, with the simultaneous LOFAR beam formed full Stokes observations, (frequency and time resolution of 10 ms and 12 kHz, respectively), we estimated the coronal magnetic field along these five electron beam paths. This was done by calculating the degree of circular polarisation using the IQUV spectra of the harmonic plasma emission from the type III bursts (Kumari, Zucca et al. in prep.).

Supervisor: Dr. Pietro Zucca (ASTRON)
Co-Supervisor: Sarrvesh Sridhar (ASTRON)
This data set is part of LOFAR LC9_002 cycle data (PI - P. Zucca)
Copyright: ASTRON
 
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