Title:

Microwave imaging observation of an electron stream in a solar flare

Authors:　 Yokoyama, T.; Nakajima, H.; Shibasaki, K.; Melnikov, V. F.; Stepanov, A. V.

Abstract

We report a Nobeyama Radioheliograph (NoRH) microwave observation of a propagating feature of nonthermal emission in a solar flare. The flare had a very extended source well resolved by NoRH. In the rising phase of the microwave burst, a non-thermal gyrosynchrotron source was observed by the high-rate (10 images per second) observations to propagate from one end of the loop to the other with a speed of 9 × 104 km s^-1. We interpret this non-thermal propagating source is emitted from streaming electrons.