Journal
GENERAL RELATIVITY AND GRAVITATION
Volume 41, Issue 1, Pages 191-201Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10714-008-0666-9
Keywords
String cosmology; CMP
Funding
- NASA Office of Space Science
- STFC [ST/F002998/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/F002998/1] Funding Source: researchfish
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We consider a recently proposed scenario for the generation of primordial cosmological perturbations, the so called Cosmological Slingshot scenario. We first obtain a general expression for the Slingshot primordial power spectrum which extends previous results by including a blue pre-bounce residual contribution at large scales. Starting from this expression we numerically compute the CMB temperature and polarization power spectra arising from the Slingshot scenario and show that they excellently match the standard WMAP 3-year best-fit results. In particular, if the residual blue spectrum is far above the largest WMAP observed scale, the Slingshot primordial spectrum fits the data well by only fixing its amplitude and spectral index at the pivot scale k (p) = 10(-3) h Mpc(-1). We finally show that all possible distinctive Slingshot signatures in the CMB power spectra are confined to very low multipoles and thus very hard to detect due to large cosmic variance dominated error bars at these scales.
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