VLA imaging spectroscopic observations of decimetric radio bursts in the impulsive phase of a C7.2 solar flare

Broadband radio dynamic imaging spectroscopic observations at decimetric wavelengths provide powerful diagnostics for magnetic energy release and particle acceleration processes in solar flares. On November 1st, 2014, we used the Karl G. Janskey Very Large Array (VLA) to observe a C7.2 flare in 1-2 GHz with 512 spectral channels and a 50 millisecond cadence. A variety of decimetric radio bursts were recorded during the impulsive phase of the flare, including type III radio bursts, spike bursts, and other bursts with unusual appearance in the dynamic spectrum. We use simultaneous imaging and dynamic spectroscopy to obtain the location and morphology of the radio sources as well as their evolution in time and frequency, which are used to elucidate the physical mechanisms of the radio bursts and trace energetic electrons in the flaring region. The flare was also observed by SDO/AIA in EUV and RHESSI in hard X-rays. We discuss implications of our results on the energy release and particle acceleration processes of this flare.