ISSN:
1090-6487
Keywords:
98.70.Vc
;
95.85.Bh
;
997.10.Ri
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We calculate the temperature anisotropies of the cosmic microwave background (CMB) for several initial power spectra of density perturbations with a built-in scale suggested by recent optical data on the spatial distribution of rich clusters of galaxies. Using cosmological models with different values of the spectral index, baryon fraction, Hubble constant, and cosmological constant, we compare the calculated radiation power spectrum with the CMB temperature anisotropies measured by the Saskatoon experiment. We show that spectra with a spike at 120h −1 Mpc are in agreement with the Saskatoon data. The combined evidence from cluster and CMB data favors the presence of a peak and a subsequent break in the initial matter power spectrum. Such a feature is similar to the prediction of an inflationary model wherein an inflaton field is evolving through a kink in the potential.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1134/1.567540
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