Measurement of polarization with the Degree Angular Scale Interferometer.

Abstract:

:Measurements of the cosmic microwave background (CMB) radiation can reveal with remarkable precision the conditions of the Universe when it was approximately 400,000 years old. The three most fundamental properties of the CMB are its frequency spectrum (which determines the temperature), and the fluctuations in both the temperature and polarization across a range of angular scales. The frequency spectrum has been well determined, and considerable progress has been made in measuring the power spectrum of the temperature fluctuations. But despite many efforts to measure the polarization, detection of this property of the CMB has hitherto been beyond the reach of even the most sensitive observations. Here we describe the Degree Angular Scale Interferometer (DASI), an array of radio telescopes, which for the past two years has conducted polarization-sensitive observations of the CMB from the Amundsen-Scott South Pole research station.

journal_name

Nature

journal_title

Nature

authors

Leitch EM,Kovac JM,Pryke C,Carlstrom JE,Halverson NW,Holzapfel WL,Dragovan M,Reddall B,Sandberg ES

doi

10.1038/nature01271

keywords:

subject

Has Abstract

pub_date

2002-12-19 00:00:00

pages

763-71

issue

6917

eissn

0028-0836

issn

1476-4687

pii

nature01271

journal_volume

420

pub_type

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