Rita Belén Barreiro

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This paper presents cosmological results based on full-mission Planck observations of temperature and polarization anisotropies of the cosmic microwave background (CMB) radiation. Our results are in very good agreement with the 2013 analysis of the Planck nominal-mission temperature data, but with increased precision. The temperature and polarization power(More)
We analyse the implications of the Planck data for cosmic inflation. The Planck nominal mission temperature anisotropy measurements, combined with the WMAP large-angle polarization, constrain the scalar spectral index to ns = 0.9603 ± 0.0073, ruling out exact scale invariance at over 5σ. Planck establishes an upper bound on the tensor-to-scalar ratio at r <(More)
Abstract: This paper presents the first cosmological results based on Planck measurements of the cosmic microwave background (CMB) temperature and lensing-potential power spectra. We find that the Planck spectra at high multipoles (` ∼ 40) are extremely well described by the standard spatially-flat six-parameter ΛCDM cosmology with a power-law spectrum of(More)
We study the implications of Planck data for models of dark energy (DE) and modified gravity (MG), beyond the standard cosmological constant scenario. We start with cases where the DE only directly affects the background expansion, considering Taylor expansions of the equation of state w(a), as well as principal component analysis and parameterizations(More)
Context. The Planck satellite will map the full sky at nine frequencies from 30 to 857 GHz. The CMB intensity and polarization that are its prime targets are contaminated by foreground emission. Aims. The goal of this paper is to compare proposed methods for separating CMB from foregrounds based on their different spectral and spatial characteristics, and(More)
The cosmic microwave background (CMB) is a relic radiation of the Big Bang and as such it contains a wealth of cosmological information. Statistical analyses of the CMB, in conjunction with other cosmological observables, represent some of the most powerful techniques available to cosmologists for placing strong constraints on the cosmological parameters(More)
Taking advantage of the all-sky coverage and broad frequency range of the Planck satellite, we study the Sunyaev-Zeldovich (SZ) and pressure profiles of 62 nearby massive clusters detected at high significance in the 14-month nominal survey. Careful reconstruction of the SZ signal indicates that most clusters are individually detected at least out to R500.(More)
Planck Collaboration: P. A. R. Ade91, N. Aghanim64, M. Arnaud78, M. Ashdown74,6, J. Aumont64, C. Baccigalupi90, A. J. Banday101,10, R. B. Barreiro70, J. G. Bartlett1,72, N. Bartolo33,71, E. Battaner103,104, K. Benabed65,100, A. Benoı̂t62, A. Benoit-Lévy25,65,100, J.-P. Bernard101,10, M. Bersanelli36,53, P. Bielewicz101,10,90, A. Bonaldi73, L. Bonavera70, J.(More)
We review the current status of the cosmic microwave background (CMB) radiation, including a brief discussion of some basic theoretical aspects as well as a summary of anisotropy detections and CMB experiments. We focus on the description of some relevant characteristics of the microwave foregrounds, on the discussion of the different estimators proposed in(More)
We study the detection of extragalactic point sources in two-dimensional flat simulations for all the frequencies of the forthcoming ESA’s Planck mission. In this work we have used the most recent available templates of the microwave sky: as for the diffuse Galactic components and the Sunyaev-Zel’dovich clusters we have used the “Plank Reference Sky Model”;(More)