Physics of the Cosmic Microwave Background and the Planck Mission

Details Physics of the Cosmic Microwave Background and the Planck Mission Physics of the Cosmic Microwave Background and the Planck Mission

2010-12-23

arxiv.org/abs/1012.5204v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Proceedings of the 2010 CERN Summer School, Raseborg (Finland), submitted for publication in a CERN Yellow Report

Scientific paper

This lecture is a sketch of the physics of the cosmic microwave background. The observed anisotropy can be divided into four main contributions: variations in the temperature and gravitational potential of the primordial plasma, Doppler effect from its motion, and a net red/blueshift the photons accumulate from traveling through evolving gravitational potentials on their way from the primordial plasma to here. These variations are due to primordial perturbations, probably caused by quantum fluctuations in the very early universe. The ongoing Planck satellite mission to observe the cosmic microwave background is also described.

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