First Intrinsic Anisotropy Observations with the Cosmic Background Imager

Abstract

We present the first results of observations of the intrinsic anisotropy of the cosmic microwave background radiation with the Cosmic Background Imager from a site at 5080 m altitude in northern Chile. Our observations show a sharp decrease in C_l in the range l=400 - 1500. The broadband amplitudes we have measured are deltaT(band) = 58.7 (-6.3, +7.7) microK for l = 603 (-166, +180) and 29.7 (-4.2, +4.8) microK for l = 1190 (-224, +261), where these are half-power widths in l. Such a decrease in power at high l is one of the fundamental predictions of the standard cosmological model, and these are the first observations which cover a broad enough l range to show this decrease in a single experiment. The C_l we have measured enable us to place limits on the density parameter, Omega(tot) <= 0.4 or $Omega(tot) >= 0.7 (90% confidence).

5 pages including 2 figures. Corrected an error in the comparison with Boomerang and Maxima

References in corpus (15)

• A Flat Universe from High-Resolution Maps of the Cosmic Microwave Background Radiation
• A Line of Sight Approach to Cosmic Microwave Background Anisotropies
• MAXIMA-1: A Measurement of the Cosmic Microwave Background Anisotropy on angular scales of 10 arcminutes to 5 degrees
• The Deuterium Abundance Towards Q1937-1009
• First Estimations of Cosmological Parameters From BOOMERANG
• The Deuterium to Hydrogen Abundance Ratio Towards a Fourth QSO: HS0105+1619
• Foregrounds and Forecasts for the Cosmic Microwave Background
• An Anomalous Component of Galactic Emission
• The Cosmic Microwave Background and Particle Physics
• Interferometric Observation of Cosmic Microwave Background Anisotropies
• An Australia telescope survey for CMB anisotropies
• An Upper Limit to Arcminute Scale Anisotropy in the Cosmic Microwave Background Radiation at 142 GHz
• Detection of Cosmic Microwave Background Structure in a Second Field with the Cosmic Anisotropy Telescope
• An Absolute Flux Density Measurement of the Supernova Remnant Casseopia A at 32 GHz
• Limits on Arcminute Scale Cosmic Microwave Background Anisotropy with the BIMA Array

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