Analytical description of spectral distortions of the cosmic microwave background.

Details Analytical description of spectral distortions of the cosmic microwave background. Analytical description of spectral distortions of the cosmic microwave background.

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...303..323b&link_type=abstract

Astronomy and Astrophysics, v.303, p.323

Astronomy and Astrophysics

Astrophysics

23

Cosmic Microwave Background

Scientific paper

We present analytic approximation formulae describing spectral distortions of the Cosmic Microwave Background (CMB) as a function of three basic parameters: the amount of energy injected in the radiation field, the time at which the heating occurred, and the baryon density {OMEGA}_b_. These formulae allow easy exploitation of the high accuracy measurements of the CMB spectrum to derive constraints on physical processes that may have occurred in the early universe, dispensing with the need of resorting to heavy numerical calculations.

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