Abstract
Morphological developments of several small radio bursts are studied
using Nobeyama
Radioheliograph.
In some events, only one source is involved in the
event. In other events, more
than two sources are involved and they show different temporal
developments especially in the
early phase. We studied the emission mechanism of each component sources
by considering
temporal behavior, polarization degree and also soft X-ray images taken
simultaneously by
Yohkoh satellite. We identified thermal free-free and nonthermal
gyrosynchrotron emissions in
the radio bursts and studied their relations.