Radio emission coming from a region of the gum nebulae

Abstract

The continuum radiations at 1420 MHz, coming from the Gum nebula region centered around the point of galactic coordinates 1 = 263° , b = +7° and detected with the radiotelescope of the IAR, are compared with that registered at 408 MHz by Haslam et al. Contributions coming from the galactic and extragalactic backgrounds, and the thermal and synchrotron components for the nebula, are discriminated. For the latter, theoretical results are presented which allow for the determination of the spectral index corresponding to the energetic spectrum of the relativistic electrons.