Numbers of Electrons in Solar Flares as Deduced fromMicrowave and X-Ray Bursts

Abstract

We discuss whether the numbers of x-ray andradio-produced electrons in solar flares are the same. The number ofradio-produced electrons that is estimated with an inhomogeneous sourceincreases by a factor of 103-104 because of the inhomogeneity and thedecreased magnetic field (B = 120 G) of the radio source. The number ofx-ray-produced electrons decreases by a factor of 10-30 due to theincrease of the number density of ions (3×1010 cm-3).These are the reasons why the number of radio-produced electrons isapproximately equal to that of x-ray-produced electrons in the 1981 April27 burst.