Consistency of cosmic microwave background temperature measurements in three frequency bands in the 2500-square-degree SPT-SZ survey
| Autor: | John E. Carlstrom, Daniel M. Luong-Van, T. de Haan, Bradford Benson, K. T. Story, Joseph J. Mohr, J. T. Sayre, R. Chown, T. M. Crawford, Adrian T. Lee, Z. K. Staniszewski, N. W. Halverson, W. B. Everett, W. L. Holzapfel, N. L. Harrington, Jason W. Henning, C. L. Chang, Marius Millea, C. Pryke, M. A. Dobbs, K. Aylor, Jeff McMahon, J. D. Hrubes, Lindsey Bleem, R. Williamson, Christian L. Reichardt, Y. Omori, Lloyd Knox, A. T. Crites, J. E. Ruhl, Erik Shirokoff, Joaquin Vieira, Elizabeth George, Keith Vanderlinde, S. S. Meyer, Stephen Padin, Zhen Hou, G. P. Holder, T. Natoli, H-M. Cho, K. K. Schaffer, L. M. Mocanu, Daniel P. Marrone, W. L. K. Wu, Antony A. Stark |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO) 010308 nuclear & particles physics media_common.quotation_subject Cosmic microwave background Astrophysics::Instrumentation and Methods for Astrophysics Spectral density FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Temperature measurement Radio spectrum South Pole Telescope Consistency (statistics) Sky 0103 physical sciences 010303 astronomy & astrophysics Noise (radio) media_common Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | We present an internal consistency test of South Pole Telescope (SPT) measurements of the cosmic microwave background (CMB) temperature anisotropy using three-band data from the SPT-SZ survey. These measurements are made from observations of ~2500 deg^2 of sky in three frequency bands centered at 95, 150, and 220 GHz. We combine the information from these three bands into six semi-independent estimates of the CMB power spectrum (three single-frequency power spectra and three cross-frequency spectra) over the multipole range 650 < l < 3000. We subtract an estimate of foreground power from each power spectrum and evaluate the consistency among the resulting CMB-only spectra. We determine that the six foreground-cleaned power spectra are consistent with the null hypothesis, in which the six cleaned spectra contain only CMB power and noise. A fit of the data to this model results in a chi-squared value of 236.3 for 235 degrees of freedom, and the probability to exceed this chi-squared value is 46%. 21 pages, 4 figures, current version matches version published in JCAP |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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