Inflation model constraints from the Wilkinson Microwave Anisotropy Probe three-year data
| dc.creator | Kinney, William H. | |
| dc.creator | Kolb, Edward W. | |
| dc.creator | Melchiorri, Alessandro | |
| dc.creator | Riotto, Antonio | |
| dc.date | 2006-05-13 | |
| dc.date.accessioned | 2026-07-07T11:25:35Z | |
| dc.date.available | 2026-07-07T11:25:35Z | |
| dc.description | We extract parameters relevant for distinguishing among single-field inflation models from the Wilkinson Microwave Anisotropy Probe (WMAP) three-year data set, and also from WMAP in combination with the Sloan Digital Sky Survey (SDSS) galaxy power spectrum. Our analysis leads to the following conclusions: 1) the Harrison--Zel'dovich model is consistent with both data sets at a 95% confidence level; 2) there is no strong evidence for running of the spectral index of scalar perturbations; 3) Potentials of the form V \propto ϕ^p are consistent with the data for p = 2, and are marginally consistent with the WMAP data considered alone for p = 4, but ruled out by WMAP combined with SDSS. We perform a "Monte Carlo reconstruction" of the inflationary potential, and find that: 1) there is no evidence to support an observational lower bound on the amplitude of gravitational waves produced during inflation; 2) models such as simple hybrid potentials which evolve toward an inflationary late-time attractor in the space of flow parameters are strongly disfavored by the data, 3) models selected with even a weak slow-roll prior strongly cluster in the region favoring a "red" power spectrum and no running of the spectral index, consistent with simple single-field inflation models. | |
| dc.description | 11 pages, 6 figures | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0605338 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0605338 | |
| dc.identifier | Phys.Rev.D74:023502,2006 | |
| dc.identifier | doi:10.1103/PhysRevD.74.023502 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/195553 | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Inflation model constraints from the Wilkinson Microwave Anisotropy Probe three-year data | |
| dc.type | text |