Fig. 6
From: Imaging spectroscopy of solar radio burst fine structures
Statistical properties of the source areal expansion factors. a Flux along the spine of the Type IIIb burst as a function of frequency. Peaks colored in red indicate selected fine temporal stria. b Expansion rate dA/dt for all frequency channels with well-observed striae (those indicated by red in the top panel); the red and blue lines show the 1-MHz average values for fundamental and harmonic radiation, respectively. c ratio of the expansion rates \((d{A^{\rm{F}}}/dt)/(d{A^{\rm{H}}}/dt)\) as a function of frequency, averaged over the 1 MHz frequency bins. The error bars represent one standard deviation of uncertainty
