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Cosmic Microwave Background anisotropies: the power spectrum and beyond. In: Data Analysis in Cosmology, ed by

By Enrique Martínez-gonzález and Patricio Vielva


Cosmic Microwave Background, data analysis, cosmological parameters We present a review of some interesting theoretical and observational aspects of the Cosmic Microwave Background anisotropies. The standard inflationary model presents a simple scenario within which the homogeneity, isotropy and flatness of the universe appear as natural outcomes and, in addition, fluctuations in the energy density are originated during the inflationary phase. These seminal density fluctuations give rise to fluctuations in the temperature of the Cosmic Microwave Background (CMB) at the decoupling surface. Afterward, the CMB photons propagate almost freely, with slight gravitational interactions with the evolving gravitational field present in the large scale structure (LSS) of the matter distribution and a low scattering rate with free electrons after the universe becomes reionized by the first stars and QSOs. These secondary effects slightly change the shape of the intensity and polarization angular power spectra of the radiation, the so called Cℓ. The Cℓ contain very valuable information o

Year: 2013
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