Cosmic Microwave Background

We have a large programme in Oxford to use CMB data to understand
properties of the universe, from inflation to dark energy. Some of our key
projects are the Planck satellite, the Atacama Cosmology Telescope
(and its successor, ACTPol), and WMAP. Planck is the third generation
CMB satellite, and we are working on analysis of the data. The Atacama
Cosmology Telescope (ACT, see image above) is an NSF-funded telescope
in the Atacama Desert in Chile, measuring the CMB at arcminute
scales. At Oxford we work on cosmological interpretation of the ACT
data, from computing the power spectrum, modeling foregrounds, to
estimating cosmological parameters. ACTPol, will
measure the polarization of the CMB at small-scales. It will target
neutrino and Dark Energy properties through gravitational lensing, and
early universe physics through the primordial CMB signal.

We also play a lead role in developing and depolying the C-BASS
instruments which will produce all-sky maps of the CMB. In addition to
playing an essential part in the quest for revealing the tiny
fluctuations in the CMB and understanding the origin and evolution of
our universe, C-BASS will vastly increase our understanding of the
physics of the gas between the stars in our own Galaxy, for example by
mapping out the magnetic field in the Galaxy.