High dynamic range images of the solar corona between 150 and 450 MHz

Abstract

We present radio images of the quiet Sun obtained with the Nançay Radioheliograph between 150 and 450 MHz, using the latest improvements in the instrument and in the data processing techniques. We emphasize new aspects of the corona observable in this frequency range, particularly the prominence of coronal holes, and discuss implications for future studies. © 2009. The American Astronomical Society. All rights reserved.