CM2-3 - (CM2) Cosmology with the Cosmic Microwave Background: Implications of Planck and Other Experiments in Temperature and Polarization (CM3) Galaxy Clusters as probes for Cosmology and Dark Matter |
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Speaker |
Benetti, Micol |
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Coauthors |
Alcaniz J. ; Bernui A. |
| Talk Title |
Features in the spectrum of primordial perturbations, constraints from CMB and SDSS data. |
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Abstract |
In the current Standard Cosmological Model, according to the Inflation paradigm, the primordial curvature perturbations set the initial conditions for both the CMB anisotropies and the large-scale structure distributions. Therefore, the primordial oscillatory signal is imprinted in all the current observables. In the inflationary context, several classes of models explore primordial curvature perturbations with radical departure from the near-scale-invariant power-law spectrum of the standard slow-roll scenario. These inflationary models are quite interesting since they produce features at low-multipoles in the CMB power spectrum as well as characteristic features in the matter power spectrum. We investigated these models using combined data from the CMB and LSS, in order to confirm or exclude them. Our results shows an improvement of the chi-squared value using both the SDSS survey data and CMB data respect to the same analysis using only CMB data. We also present a forecast for the J-PAS experiment, a new astronomical facility due to a strict Spanish-Brazilian collaboration. |
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