scholarly journals High-sensitivity measurements of the cosmic microwave background power spectrum with the extended Very Small Array

2004 ◽  
Vol 353 (3) ◽  
pp. 732-746 ◽  
Author(s):  
Clive Dickinson ◽  
Richard A. Battye ◽  
Pedro Carreira ◽  
Kieran Cleary ◽  
Rod D. Davies ◽  
...  
Keyword(s):  
Power Spectrum ◽  
Cosmic Microwave Background ◽  
High Sensitivity ◽  
Microwave Background ◽  
Small Array

scholarly journals The cosmic microwave background power spectrum out to  = 1400 measured by the Very Small Array

2003 ◽  
Vol 341 (4) ◽  
pp. L23-L28 ◽  
Author(s):  
K. Grainge ◽  
P. Carreira ◽  
K. Cleary ◽  
R. D. Davies ◽  
R. J. Davis ◽  
...  
Keyword(s):  
Power Spectrum ◽  
Cosmic Microwave Background ◽  
Microwave Background ◽  
Small Array

THE VERY SMALL ARRAY: LATEST RESULTS AND FUTURE PLANS

2004 ◽  
Vol 19 (13n16) ◽  
pp. 1009-1018
Author(s):  
KEITH GRAINGE
Keyword(s):  
Power Spectrum ◽  
Cosmological Parameters ◽  
Topological Defects ◽  
High Sensitivity ◽  
Microwave Background ◽  
Signal To Noise ◽  
Small Array ◽  
Good Signal ◽  
Excess Power ◽  
Future Plans

The VSA is an aperture synthesis array dedicated to measuring anisotropies in the Cosmic Microwave Background (CMB). It has observed in two configurations to measure the CMB power spectrum from ℓ=150–1600, detecting the first three acoustic peaks at good signal-to-noise. We now plan to enhance the telescope to allow observation at higher ℓ. This will allow measurement of the fourth and subsequent peaks and will allow us to break degeneracies that exist at present between cosmological parameters. In addition we will investigate the excess power detected by CBI at ℓ > 2000 and will conduct high-sensitivity searches for topological defects.

scholarly journals First results from the Very Small Array -- III. The cosmic microwave background power spectrum

2003 ◽  
Vol 341 (4) ◽  
pp. 1076-1083 ◽  
Author(s):  
P. F. Scott ◽  
P. Carreira ◽  
K. Cleary ◽  
R. D. Davies ◽  
R. J. Davis ◽  
...  
Keyword(s):  
Power Spectrum ◽  
Cosmic Microwave Background ◽  
Microwave Background ◽  
First Results ◽  
Small Array

scholarly journals Cosmic calibration: Constraints from the matter power spectrum and the cosmic microwave background

2007 ◽  
Vol 76 (8) ◽  
Author(s):  
Salman Habib ◽  
Katrin Heitmann ◽  
David Higdon ◽  
Charles Nakhleh ◽  
Brian Williams
Keyword(s):  
Power Spectrum ◽  
Cosmic Microwave Background ◽  
Microwave Background ◽  
Matter Power Spectrum

scholarly journals NATURAL INFLATION, PLANCK SCALE PHYSICS AND OSCILLATING PRIMORDIAL SPECTRUM

2005 ◽  
Vol 14 (08) ◽  
pp. 1347-1364 ◽  
Author(s):  
XIULIAN WANG ◽  
BO FENG ◽  
MINGZHE LI ◽  
XUE-LEI CHEN ◽  
XINMIN ZHANG
Keyword(s):  
Power Spectrum ◽  
Cosmic Microwave Background ◽  
High Frequency ◽  
Large Scale ◽  
Planck Scale ◽  
Microwave Background ◽  
Precision Data ◽  
Inflation Model ◽  
High Precision Data ◽  
Planck Scale Physics

In the "natural inflation" model, the inflaton potential is periodic. We show that Planck scale physics may induce corrections to the inflaton potential, which is also periodic with a greater frequency. Such high frequency corrections produce oscillating features in the primordial fluctuation power spectrum, which are not entirely excluded by the current observations and may be detectable in high precision data of cosmic microwave background (CMB) anisotropy and large scale structure (LSS) observations.

Imaging the Cosmic Microwave Background with the Arcminute Cosmology Bolometer Array Receiver

2005 ◽  
Vol 216 ◽  
pp. 43-50
Author(s):  
J. B. Peterson ◽  
A. K. Romer ◽  
P. L. Gomez ◽  
P. A. R. Ade ◽  
J. J. Bock ◽  
...  
Keyword(s):  
Power Spectrum ◽  
Cosmic Microwave Background ◽  
Cosmological Parameters ◽  
Galaxy Cluster ◽  
Clusters Of Galaxies ◽  
Microwave Background ◽  
Bolometer Array ◽  
The Galaxy ◽  
Millimeter Wave Receiver ◽  
Array Receiver

The Arcminute Cosmology Bolometer Array Receiver (Acbar) is a multifrequency millimeter-wave receiver optimized for observations of the Cosmic Microwave Background (CMB) and the Sunyaev-Zel'dovich (SZ) effect in clusters of galaxies. Acbar was installed on the 2.1 m Viper telescope at the South Pole in January 2001 and the results presented here incorporate data through July 2002. The power spectrum of the CMB at 150 GHz over the range ℓ = 150 — 3000 measured by Acbar is presented along with estimates for the values of the cosmological parameters within the context of ΛCDM models. The inclusion of ΩΛ greatly improves the fit to the power spectrum. Three-frequency images of the SZ decrement/increment are also presented for the galaxy cluster 1E0657–67.

The TopHat Cosmic Microwave Background Anisotropy Experiment

2005 ◽  
Vol 201 ◽  
pp. 65-70
Author(s):  
Robert F. Silverberg ◽  
Keyword(s):  
Cosmic Microwave Background ◽  
Large Scale ◽  
Background Radiation ◽  
High Sensitivity ◽  
Microwave Background ◽  
Long Duration ◽  
Cosmic Microwave Background Anisotropy ◽  
Microwave Background Radiation ◽  
The Universe ◽  
Large Scale Structure Formation

We have developed a balloon-borne experiment to measure the Cosmic Microwave Background Radiation anisotropy on angular scales from ˜50° down to ˜20′. The instrument observes at frequencies between 150 and 690 GHz and will be flown on an Antarctic circumpolar long duration flight. To greatly improve the experiment performance, the front-end of the experiment is mounted on the top of the balloon. With high sensitivity, broad sky coverage, and well-characterized systematic errors, the results of this experiment can be used to strongly constrain cosmological models and probe the early stages of large-scale structure formation in the Universe.

Estimating the power spectrum of the cosmic microwave background

1998 ◽  
Vol 57 (4) ◽  
pp. 2117-2137 ◽  
Author(s):  
J. R. Bond ◽  
A. H. Jaffe ◽  
L. Knox
Keyword(s):  
Power Spectrum ◽  
Cosmic Microwave Background ◽  
Microwave Background
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