Naslov
Breaking the scale invariance of the primordial spectrum or not: the new WMAP data

Autori
Palle, Davor

Izvornik
Il Nuovo cimento della societa italiana di fisica. B, General physics, relativity, astronomy and mathematical physics and methods (1594-9982) 122 (2007), 1; 67-73

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
scale invariance; primordial spectrum

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA