CMB interferometry

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Interferometry has been a very successful tool for measuring anisotropies in the cosmic microwave background. Interferometers provided the first constraints on CMB anisotropies on small angular scales (∼ 10000) in the 1980s and then in the late 1990s and early 2000s made groundbreaking measurements of the CMB power spectrum at intermediate and small angular scales covering the range 100-4000. In 2002 the DASI made the first detection of CMB polarization which remains a major goal for current and future CMB experiments. Interferometers have also made major contributions to the detection and surveying of the Sunyaev-Zel'dovich (SZ) effect in galaxy clusters. In this short review I cover the key aspects that made interferometry well-suited to CMB measurements and summarise some of the central observations that have been made. I look to the future and in particular to HI intensity mapping at high redshifts that could make use of the advantages of interferometry.

Original languageEnglish
Number of pages8
JournalProceedings of Science
Publication statusPublished - 1 Jan 2012
Event2012 Resolving The Sky - Radio Interferometry: Past, Present and Future, RTS 2012 - Manchester, United Kingdom
Duration: 17 Apr 201220 Apr 2012


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