Preprint typeset using L ATEX style emulateapj v. 14/09/00 DASI FIRST RESULTS: A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND ANGULAR
We present measurements of anisotropy in the Cosmic Microwave Background (CMB) from the first season of observations with the Degree Angular Scale Interferometer (DASI). The instrument was deployed at the South Pole in the austral summer 1999–2000, and made observations throughout the following aust...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.257.7694 2023-05-15T18:22:46+02:00 Preprint typeset using L ATEX style emulateapj v. 14/09/00 DASI FIRST RESULTS: A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND ANGULAR Power Spectrum N. W. Halverson E. M. Leitch C. Pryke J. Kovac J. E. Carlstrom W. L. Holzapfel M. Dragovan J. K. Cartwright B. S. Mason S. Padin T. J. Pearson M. C. Shepherd A. C. S. Readhead The Pennsylvania State University CiteSeerX Archives 2008 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.257.7694 http://arxiv.org/pdf/astro-ph/0104489v1.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.257.7694 http://arxiv.org/pdf/astro-ph/0104489v1.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://arxiv.org/pdf/astro-ph/0104489v1.pdf text 2008 ftciteseerx 2016-01-07T20:01:24Z We present measurements of anisotropy in the Cosmic Microwave Background (CMB) from the first season of observations with the Degree Angular Scale Interferometer (DASI). The instrument was deployed at the South Pole in the austral summer 1999–2000, and made observations throughout the following austral winter. We have measured the angular power spectrum of the CMB in the range 100 < l < 900 with high signal-to-noise. In this paper we review the formalism used in the analysis, in particular the use of constraint matrices to project out contaminants such as ground and point source signals, and to test for correlations with diffuse foreground templates. We find no evidence of foregrounds other than point sources in the data, and find a maximum likelihood temperature spectral index β = −0.1±0.2 (1σ), consistent with CMB. We detect a first peak in the power spectrum at l ∼ 200, in agreement with previous experiments. In addition, we detect a peak in the power spectrum at l ∼ 550 and power of similar magnitude at l ∼ 800 which are consistent with the second and third harmonic peaks predicted by adiabatic inflationary cosmological models. Subject headings: cosmology: cosmic microwave background—cosmology: observations Text South pole Unknown Austral South Pole |
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English |
description |
We present measurements of anisotropy in the Cosmic Microwave Background (CMB) from the first season of observations with the Degree Angular Scale Interferometer (DASI). The instrument was deployed at the South Pole in the austral summer 1999–2000, and made observations throughout the following austral winter. We have measured the angular power spectrum of the CMB in the range 100 < l < 900 with high signal-to-noise. In this paper we review the formalism used in the analysis, in particular the use of constraint matrices to project out contaminants such as ground and point source signals, and to test for correlations with diffuse foreground templates. We find no evidence of foregrounds other than point sources in the data, and find a maximum likelihood temperature spectral index β = −0.1±0.2 (1σ), consistent with CMB. We detect a first peak in the power spectrum at l ∼ 200, in agreement with previous experiments. In addition, we detect a peak in the power spectrum at l ∼ 550 and power of similar magnitude at l ∼ 800 which are consistent with the second and third harmonic peaks predicted by adiabatic inflationary cosmological models. Subject headings: cosmology: cosmic microwave background—cosmology: observations |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Power Spectrum N. W. Halverson E. M. Leitch C. Pryke J. Kovac J. E. Carlstrom W. L. Holzapfel M. Dragovan J. K. Cartwright B. S. Mason S. Padin T. J. Pearson M. C. Shepherd A. C. S. Readhead |
spellingShingle |
Power Spectrum N. W. Halverson E. M. Leitch C. Pryke J. Kovac J. E. Carlstrom W. L. Holzapfel M. Dragovan J. K. Cartwright B. S. Mason S. Padin T. J. Pearson M. C. Shepherd A. C. S. Readhead Preprint typeset using L ATEX style emulateapj v. 14/09/00 DASI FIRST RESULTS: A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND ANGULAR |
author_facet |
Power Spectrum N. W. Halverson E. M. Leitch C. Pryke J. Kovac J. E. Carlstrom W. L. Holzapfel M. Dragovan J. K. Cartwright B. S. Mason S. Padin T. J. Pearson M. C. Shepherd A. C. S. Readhead |
author_sort |
Power Spectrum |
title |
Preprint typeset using L ATEX style emulateapj v. 14/09/00 DASI FIRST RESULTS: A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND ANGULAR |
title_short |
Preprint typeset using L ATEX style emulateapj v. 14/09/00 DASI FIRST RESULTS: A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND ANGULAR |
title_full |
Preprint typeset using L ATEX style emulateapj v. 14/09/00 DASI FIRST RESULTS: A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND ANGULAR |
title_fullStr |
Preprint typeset using L ATEX style emulateapj v. 14/09/00 DASI FIRST RESULTS: A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND ANGULAR |
title_full_unstemmed |
Preprint typeset using L ATEX style emulateapj v. 14/09/00 DASI FIRST RESULTS: A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND ANGULAR |
title_sort |
preprint typeset using l atex style emulateapj v. 14/09/00 dasi first results: a measurement of the cosmic microwave background angular |
publishDate |
2008 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.257.7694 http://arxiv.org/pdf/astro-ph/0104489v1.pdf |
geographic |
Austral South Pole |
geographic_facet |
Austral South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
http://arxiv.org/pdf/astro-ph/0104489v1.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.257.7694 http://arxiv.org/pdf/astro-ph/0104489v1.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766202194514673664 |