Abstract
Nobeyama Radioheliograph
operates at 17 GHz and realizes high spatial
and time resolution
imaging capabilities of the whole Sun with high image quality. The
objective of this instrument is
to study various phenomena in the solar atmosphere, putting stress on
active phenomena such as
flares and active region evolution. From initial observations of solar
flares, the following topics are
presented: a thermal flare suggesting plasma heating through loop-loop
interaction; prominence
eruption followed by formation of arcade loops as evidence of energy
release through magnetic
reconnection; impulsive flares interpreted as production of nonthermal
electron beams; and an
intense flare initiated by preflare activities.