Anisotropies in the microwave background due to the Sunyaev-Zel'dovich effect from virialized objects at high redshifts

Details Anisotropies in the microwave background due to the Sunyaev-Zel'dovich effect from virialized objects at high redshifts Anisotropies in the microwave background due to the Sunyaev-Zel'dovich effect from virialized objects at high redshifts

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...405....1m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 405, no. 1, p. 1-7.

Mathematics

Logic

44

Anisotropic Media, Background Radiation, Cosmology, Galactic Clusters, Red Shift, Relic Radiation, Astronomical Models, Baryons, Dark Matter

Scientific paper

We estimate the anisotropy of the cosmic microwave background radiation via the Sunyaev-Zel'dovich effect of clusters of galaxies in CDM and Peebles isocurvature baryon (PIB) models for a wide range of cosmological parameters. The temperature anisotropies predicted in CDM models with the Harrison-Zel'dovich scale-invariant spectrum are below the current observational limit, while PIB models are compatible with the limit only for the n = -1 models with Omega0 is less than about 0.1, lambda0 = 1-Omega0, and h = 0.5, where n is the spectral index of the primordial entropy fluctuations, and Omega0, lambda0, and h are the cosmological density parameter, cosmological constant and the Hubble constant in units of 100 km/s Mpc. The n = 0 PIB models have too much small-scale power leading to the larger Sunyaev-Zel'dovich temperature fluctuations than the n = -1 models.

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