Polarization Observations of a Split-band Type II Radio Burst from the Solar Corona

Abstract Using temporal observations of circular polarized harmonic plasma emission from a split-band type II solar radio burst at 80 MHz, we separately estimated the coronal magnetic field strengths ( B ) associated with lower L and upper U frequency bands burst. The corresponding Stokes I V data were obtained polarimeter operating above in Gauribidanur observatory. was flare/coronal mass ejection on disk. Simultaneous spectral spectrograph there range 80–35 MHz helped to establish that observed component values are ≈ 1.2 G 2.4 G, respectively. different for same (80 MHz) two imply unambiguously fundamental 40 must have originated spatial locations. Two-dimensional imaging radioheliograph observatory indicate same. As comparatively higher is expected behind propagating shock due compression as well regions being closer Sun, our results sources - -band should be located ahead shock, These useful understand pre- postshock corona locations electron acceleration shock.