UCSB South Pole 1994 CMB anisotropy measurement constraints on open and flat-Lambda CDM cosmogonies
We develop methods to account for experimental and observational uncertainties in likelihood analyses of data from cosmic microwave background (CMB) anisotropy experiments and apply them to an analysis of the UCSB South Pole 1994 (SP94) experiment. Observationally motivated open and spatially-flat $...
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ftdatacite:10.48550/arxiv.astro-ph/9602141 2023-05-15T18:22:14+02:00 UCSB South Pole 1994 CMB anisotropy measurement constraints on open and flat-Lambda CDM cosmogonies Ganga, Ken Ratra, Bharat Gundersen, Josh Sugiyama, Naoshi 1996 https://dx.doi.org/10.48550/arxiv.astro-ph/9602141 https://arxiv.org/abs/astro-ph/9602141 unknown arXiv https://dx.doi.org/10.1086/304296 Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ Astrophysics astro-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 1996 ftdatacite https://doi.org/10.48550/arxiv.astro-ph/9602141 https://doi.org/10.1086/304296 2022-04-01T17:42:08Z We develop methods to account for experimental and observational uncertainties in likelihood analyses of data from cosmic microwave background (CMB) anisotropy experiments and apply them to an analysis of the UCSB South Pole 1994 (SP94) experiment. Observationally motivated open and spatially-flat $Λ$, cold dark matter cosmogonies are considered. Among the models we consider, the full SP94 data set is most consistent with $Ω_0 \sim 0.1-0.2$ open models and less so with old $(t_0 \gap 15 - 16 Gyr)$, high baryon density $(Ω_B \gap 0.0175 h^{-2})$, low density ($Ω_0 \sim 0.2 - 0.4), flat-$Λ$ models. The SP94 data do not rule out any of the models we consider at the $2σ$ level. The SP94 experiment is most sensitive to anisotropies on a somewhat larger, model-dependent, angular scale than the scale at which the window function peaks. For establishing the significance of a detection of CMB anisotropy we derive limits using the highest posterior density (HPD) prescription, since it yields smaller lower limits. Since HPD limits lead to tighter constraints on the CMB amplitude, they also provide for greater discrimination between models. Model normalizations deduced from the SP94 data subsets are mostly consistent with those deduced from the two-year COBE-DMR data, although the Ka-band data prefer a normalization $\sim 1σ$ lower than do the Q-band data, the Q and Ka + Q data favour a slightly higher normalization for the $Ω_0 = 0.1$ open model than does the DMR, and the Ka and Ka + Q data prefer a somewhat lower normalization for the older, higher $Ω_B$, low-density $Λ$ models than does the DMR. : Substantially shortened and rewritten. Accepted by ApJ. PostScript. 49 pages of text + tables. 16 pages of figures Text South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole Lambda ENVELOPE(-62.983,-62.983,-64.300,-64.300) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Astrophysics astro-ph FOS Physical sciences |
spellingShingle |
Astrophysics astro-ph FOS Physical sciences Ganga, Ken Ratra, Bharat Gundersen, Josh Sugiyama, Naoshi UCSB South Pole 1994 CMB anisotropy measurement constraints on open and flat-Lambda CDM cosmogonies |
topic_facet |
Astrophysics astro-ph FOS Physical sciences |
description |
We develop methods to account for experimental and observational uncertainties in likelihood analyses of data from cosmic microwave background (CMB) anisotropy experiments and apply them to an analysis of the UCSB South Pole 1994 (SP94) experiment. Observationally motivated open and spatially-flat $Λ$, cold dark matter cosmogonies are considered. Among the models we consider, the full SP94 data set is most consistent with $Ω_0 \sim 0.1-0.2$ open models and less so with old $(t_0 \gap 15 - 16 Gyr)$, high baryon density $(Ω_B \gap 0.0175 h^{-2})$, low density ($Ω_0 \sim 0.2 - 0.4), flat-$Λ$ models. The SP94 data do not rule out any of the models we consider at the $2σ$ level. The SP94 experiment is most sensitive to anisotropies on a somewhat larger, model-dependent, angular scale than the scale at which the window function peaks. For establishing the significance of a detection of CMB anisotropy we derive limits using the highest posterior density (HPD) prescription, since it yields smaller lower limits. Since HPD limits lead to tighter constraints on the CMB amplitude, they also provide for greater discrimination between models. Model normalizations deduced from the SP94 data subsets are mostly consistent with those deduced from the two-year COBE-DMR data, although the Ka-band data prefer a normalization $\sim 1σ$ lower than do the Q-band data, the Q and Ka + Q data favour a slightly higher normalization for the $Ω_0 = 0.1$ open model than does the DMR, and the Ka and Ka + Q data prefer a somewhat lower normalization for the older, higher $Ω_B$, low-density $Λ$ models than does the DMR. : Substantially shortened and rewritten. Accepted by ApJ. PostScript. 49 pages of text + tables. 16 pages of figures |
format |
Text |
author |
Ganga, Ken Ratra, Bharat Gundersen, Josh Sugiyama, Naoshi |
author_facet |
Ganga, Ken Ratra, Bharat Gundersen, Josh Sugiyama, Naoshi |
author_sort |
Ganga, Ken |
title |
UCSB South Pole 1994 CMB anisotropy measurement constraints on open and flat-Lambda CDM cosmogonies |
title_short |
UCSB South Pole 1994 CMB anisotropy measurement constraints on open and flat-Lambda CDM cosmogonies |
title_full |
UCSB South Pole 1994 CMB anisotropy measurement constraints on open and flat-Lambda CDM cosmogonies |
title_fullStr |
UCSB South Pole 1994 CMB anisotropy measurement constraints on open and flat-Lambda CDM cosmogonies |
title_full_unstemmed |
UCSB South Pole 1994 CMB anisotropy measurement constraints on open and flat-Lambda CDM cosmogonies |
title_sort |
ucsb south pole 1994 cmb anisotropy measurement constraints on open and flat-lambda cdm cosmogonies |
publisher |
arXiv |
publishDate |
1996 |
url |
https://dx.doi.org/10.48550/arxiv.astro-ph/9602141 https://arxiv.org/abs/astro-ph/9602141 |
long_lat |
ENVELOPE(-62.983,-62.983,-64.300,-64.300) |
geographic |
South Pole Lambda |
geographic_facet |
South Pole Lambda |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1086/304296 |
op_rights |
Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ |
op_doi |
https://doi.org/10.48550/arxiv.astro-ph/9602141 https://doi.org/10.1086/304296 |
_version_ |
1766201615055847424 |