Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...107...39d&link_type=abstract
Astronomy and Astrophysics, vol. 107, no. 1, Mar. 1982, p. 39-42. Research supported by the Consiglio Nazionale delle Ricerche.
Astronomy and Astrophysics
Astrophysics
51
Background Radiation, Big Bang Cosmology, Compton Effect, Cosmic Rays, Microwave Spectra, Relic Radiation, Bremsstrahlung, Data Smoothing, Galactic Evolution, Kinetic Equations, Photon Density, Radiation Distribution, Red Shift
Scientific paper
The role of double Compton scattering in the evolution of the microwave background spectrum during the early phases of expansion is investigated. Approximate analytic formulas are obtained for the Compton-bremsstrahlung problem to describe the smoothing out of large, small and intermediate distortions; and the conditions for complete thermalization to be achieved are delineated. Results confirm those of Lightman (1981), suggesting that above some critical redshift, double Compton emission is the dominant photon producing process and is highly efficient in smoothing out distortions, allowing complete thermalization of arbitrarily large amounts of energy injected in the radiation field.
Danese Lugi
de Zotti Gainfranco
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