Distortions of the cosmic microwave background spectrum by dust

Details Distortions of the cosmic microwave background spectrum by dust Distortions of the cosmic microwave background spectrum by dust

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.281..635r&link_type=abstract

Nature, vol. 281, Oct. 25, 1979, p. 635-638.

Astronomy and Astrophysics

Astronomy

60

Background Radiation, Big Bang Cosmology, Cosmic Dust, Microwave Spectra, Protostars, Spectrum Analysis, Astronomical Models, Black Body Radiation, Graphs (Charts), Interstellar Matter, Red Shift, Silicates

Scientific paper

The effects of dust in the early universe on the spectrum of the cosmic microwave background are considered, taking into account the effects of a pregalactic generation of stars. It is shown that observed distortions of the background spectrum from that of a black body at 3 K could be due to emission by silicate dust grains at a metal abundance of 0.00001 by mass and with a substantial energy input, which represent the remnants of population III stars. Attempts to fit the microwave background spectrum to the model of Rees (1978) in which the entire cosmic background is accounted for by grain emission are shown to require an implausible value for the metal abundance at early epochs, and not to agree with the millimeter and submillimeter spectrum observed by Woody and Richards (1979).

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