期刊
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
卷 22, 期 7, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218271813300140
关键词
Cosmology; origin and formation of the Universe; background radiations; observational cosmology; intergalactic matter
Spectral features in the CMB energy spectrum contain a wealth of information about the physical processes in the early Universe, z less than or similar to 2 x 10(6). The CMB spectral distortions are complementary to all other probes of cosmology. In fact, most of the information contained in the CMB spectrum is inaccessible by any other means. This review outlines the main physics behind the spectral features in the CMB throughout the history of the Universe, concentrating on the distortions which are inevitable and must be present at a level observable by the next generation of proposed CMB experiments. The spectral distortions considered here include spectral features from cosmological recombination, resonant scattering of CMB by metals during reionization which allows us to measure their abundances, y-type distortions during and after reionization and mu-type and i-type (intermediate between mu and y) distortions created at redshifts z greater than or similar to 1.5 x 10(4).
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