Decameter Stationary Type IV Burst in Imaging Observations on the 6th of September 2014

Abstract

First-of-its-kind radio imaging of decameter solar stationary type IV radio burst has been presented in this paper. On 6 September 2014 the observations of type IV burst radio emission have been carried out with the two-dimensional heliograph based on the Ukrainian T-shaped radio telescope (UTR-2) together with other telescope arrays. Starting at 09:55 UT and throughout 3 hours, the radio emission was kept within the observational session of UTR-2. The interesting observation covered the full evolution of this burst, "from birth to death". During the event lifetime, two C-class solar X-ray flares with peak times 11:29 UT and 12:24 UT took place. The time profile of this burst in radio has a double-humped shape that can be explained by injection of energetic electrons, accelerated by the two flares, into the burst source. According to the heliographic observations we suggest the burst source was confined within a high coronal loop, which was a part of a relatively slow coronal mass ejection. The latter has been developed for several hours before the onset of the event. Through analyzing about 1.5 million of heliograms (3700 temporal frames with 4096 images in each frame that correspond to the number of frequency channels) the radio burst source imaging shows a fascinating dynamical evolution. Both space-based (GOES, SDO, SOHO, STEREO) data and various ground-based instrumentation (ORFEES, NDA, RSTO, NRH) records have been used for this study.

References in corpus (10)

• LOFAR: The LOw-Frequency ARray
• Radio signatures of CME-streamer interaction and source diagnostics of type II radio burst
• LOFAR tied-array imaging of Type III solar radio bursts
• A solar type II radio burst from CME-coronal ray interaction: simultaneous radio and EUV imaging
• LOFAR tied-array imaging and spectroscopy of solar S bursts
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• An estimate of the magnetic field strength associated with a solar coronal mass ejection from low frequency radio observations
• Understanding CME and associated shock in the solar corona by merging multi wavelengths observation
• Radio seismology of the outer solar corona

Cited by in corpus (5)

• On the occurrence of type IV solar radio bursts in the solar cycle 24 and their association with coronal mass ejections
• A Solar Radio Dynamic Spectrograph with Flexible Temporal-spectral Resolution
• The frequency ratio and time delay of solar radio emissions with fundamental and harmonic components
• Interferometric imaging, and beam-formed study of a moving Type IV Radio burst with LOFAR
• Modelling gyrosynchrotron emission from coronal energetic electrons in a CME flux rope