Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..56...67k&link_type=abstract
Astrophysics and Space Science, vol. 56, no. 1, June 1978, p. 67-80.
Astronomy and Astrophysics
Astrophysics
5
Cosmic Rays, Cosmology, Electromagnetic Scattering, Temperature Distribution, Turbulence Effects, Black Body Radiation, Ionization
Scientific paper
Fluctuations in relict-radiation temperature caused by turbulent motions (vortex perturbations) are calculated on the basis of a previously developed theory for the evolution of cosmological turbulence. The temperature fluctuations occurring at the time of recombination (z approximately 1000) are considered. The attenuation of these fluctuations due to the optical thickness produced during reionization of the cosmological gas by young galaxies in their bright phase is taken into account along with the Doppler contribution to the temperature fluctuations arising on the last-scattering surface (where optical thickness is approximately unity and z is of the order of 10) as a result of vortex velocities and vortex-generated potential velocities. It is found that the temperature fluctuations caused by vortex motions are considerably greater than the contribution from potential motions. Significant upper and lower limits to the initial vortex velocities are obtained by comparing the calculations with available measurements of the upper limits to relict-radiation temperature fluctuations.
Kurskov A. A.
Ozernoi L. M.
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