A Multifrequency approach of the cosmological parameter estimation in presence of extragalactic point sources
arXiv:1112.3260 · doi:10.1111/j.1365-2966.2012.21735.x
Abstract
We present a multifrequency approach which optimizes the constraints on cosmological parameters with respect to extragalactic sources and secondary anisotropies contamination on small scales. We model with a minimal number of parameters the expected dominant contaminations in intensity, such as unresolved point sources and the thermal Sunyaev-Zeldovich effect. The model for unresolved point sources, either Poisson distributed or clustered, uses data from Planck early results. The overall amplitude of these contributions are included in a Markov Chain Monte Carlo analysis for the estimate of cosmological parameters. We show that our method is robust: as long as the main contaminants are taken into account the constraints on the cosmological parameters are unbiased regardless of the realistic uncertainties on the contaminants. We show also that the two parameters modelling unresolved points sources are not prior dominated.
17 Pages, 15 Figures, Submitted to MNRAS
References in corpus (14)
- High resolution CMB power spectrum from the complete ACBAR data set
- The Spitzer Deep, Wide-Field Survey
- ACTPol: A polarization-sensitive receiver for the Atacama Cosmology Telescope
- Correlated Anisotropies in the Cosmic Far-Infrared Background Detected by MIPS/Spitzer: Constraint on the Bias
- Secondary anisotropies of the CMB
- Clustering of sub-millimeter galaxies in a self-regulated baryon collapse model
- New limits on Early Dark Energy from the South Pole Telescope
- Simulations of the cosmic infrared and submillimeter background for future large surveys: I. Presentation and first application to Herschel/SPIRE and Planck/HFI
- Small Angular Scale Measurements of the CMB Temperature Power Spectrum from QUaD
- Power-Law Template for IR Point Source Clustering
- Biases on the cosmological parameters and thermal SZ residuals
- Modeling the evolution of infrared galaxies : clustering of galaxies in the Cosmic Infrared Background
- Impact of Point Source Clustering on Cosmological Parameters with CMB Anisotropies
- Small scale contributions to CMB: A coherent analysis