Infrared Dust Emission in Galaxies and Spectral Distortion of Microwave Background

Abstract

Recent observations (Matsumoto et al., 1988) indicate that at submillimeter wavelengths the spectrum of the cosmic background radiation (CBR) deviates from that of Planckian blackbody with a temperature T 0 R = 2.76 K. The relative excess of the flux ζ( v ) = [F( v ) – F 0 ( v )] / F 0 ( v ) (where F( v ) and F 0 ( v ) are the registered flux and the flux of the blackbody radiation at the frequency of the observations) are 0.6 at a frequency v 1 = 380 GHz (λ = 709 μm) and 3.4 at a frequency v 2 = 624 GHz (λ = 481 μm).