Evidence of heating of the source region in two solar microwave impulsive events

In this paper we have analyzed the characteristics of both periodic pulsation and absorption before two impulsive events at 1.35 cm observed with a radio telescope (aperture 13.7 m) with a spatial resolution ∼ 4 arcmin and a high sensitivity of 0.004sfu. It is shown that the observed characteristics can be interpreted by local heating of the source region.