Abstract Details

Name: Atul Mohan
Affiliation: NCRA-TIFR
Conference ID: ASI2017_450
Title : A Murchison Widefield Array imaging study of a type III solar radio burst
Authors and Co-Authors : Divya Oberoi NCRA-TIFR
Abstract Type : Poster
Abstract Category : Sun and the Solar System
Abstract : Type III solar radio bursts are believed to be associated with electron beams energeised during magnetic reconnection events to speeds of about c/3. In the frequency time plane the radio emission from these bursts appear as streaks of emission lasting a few seconds and showing frequency drifts of about -100 MHz/s. Due to the very dynamic nature of these bursts, their imaging radio studies have remained very challenging. New technology instruments like the Murchison Widefield Array (MWA) offer impressive spectroscopic imaging capabilities with a sufficient time resolution (spectral and temporal resolution of 40 kHz and 0.5 s, respectively). We use observations from the MWA to follow the dynamics of this emission along the time and frequency axes in the image plane. We have identified a type III solar burst which took place on November 3, 2014. Observations with bandwidth of 15 MHz each were carried out at 120 and 240 MHz. The observing bands were chosen to be a factor of two apart in frequency to enable simultaneously observations of the emission from the fundamental and the harmonic. A coronal mass ejection (CME) also took place shortly after this burst. Here we present the initial results from a detailed imaging exercise of this event and its association with solar features seen in other wavebands.