Breaking the scale invariance of the primordial spectrum or not: the new WMAP data (CROSBI ID 127827)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Palle, Davor
engleski
Breaking the scale invariance of the primordial spectrum or not: the new WMAP data
It seems that new WMAP data requires a fit with a primordial spectrum containing small negative tilt index in addition to the featureless Harrison-Zeldovich-Peebles spectrum thus implying a broken scale invariance. We show that the data could be otherwise interpreted by a scale invariant primordial spectrum with the scale non-invariant evolution of density contrast using the Press-Schechter formalism. The estimate of the acceleration parameter, as a source of the inhomogeneity of spacetime, is made by searching for the minima of the deviation measure defined by the Press-Schechter mass functions for this interpretation compared to the assumptions implicit in the WMAP fit.
scale invariance; primordial spectrum
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Podaci o izdanju
122 (1)
2007.
67-73
objavljeno
1594-9982
10.1393/ncb/i2007-10040-5
Povezanost rada
Fizika