Authors: Surajit Mondal (NJIT), Sijie Yu (NJIT), Bin Chen (NJIT), Xingyao Chen (NJIT), Peijin Zhang (NJIT), Gregg Halinnan (Caltech), Marin Anderson (Caltech) and the OVRO-LWA team

While it is well-known that the solar corona is highly dynamic, with the availability of new instruments, we have constantly uncovered more and more of its dynamic properties. The recently commissioned Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA), is no exception to this trend. The OVRO-LWA is a low frequency radio interferometer operating the frequency range 15-88 MHz. It is an all-sky instrument and has been continuously producing high dynamic range solar radio images in this frequency range since the beginning of the last year. Here we report the discovery of large scale transient non-thermal emissions from the solar corona observed with the OVRO-LWA. At these low radio frequencies nonthermal emissions are primarily observed in the form of radio bursts, which often have brightness temperatures exceeding 100 MK. Faint extended non-thermal emissions associated with CMEs have also been observed at similar frequencies. The emissions we report here are large scale, and are seen to extend up to about 7 solar radii. The emission is extremely faint, with the typical brightness temperatures being approximately a few tens of thousand K. However we do not observe any evidence of any CME or other radio transients reported earlier during these times. We demonstrate that these emissions are necessarily non-thermal in nature. These observations thus uncover a hidden population of non-thermal electrons, whose origin is however unknown at this point.