The signature of dark energy perturbations in galaxy cluster surveys
All models of dynamical dark energy possess fluctuations, which affect the number of galaxy clusters in the Universe. We have studied the impact of dark energy clustering on the number of clusters using a generalization of the spherical collapse model and the Press-Schechter formalism. Our statistic...
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ftdatacite:10.48550/arxiv.0902.3226 2023-05-15T18:22:24+02:00 The signature of dark energy perturbations in galaxy cluster surveys Abramo, L. Raul Batista, Ronaldo C. Rosenfeld, Rogerio 2009 https://dx.doi.org/10.48550/arxiv.0902.3226 https://arxiv.org/abs/0902.3226 unknown arXiv https://dx.doi.org/10.1088/1475-7516/2009/07/040 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences article-journal Article ScholarlyArticle Text 2009 ftdatacite https://doi.org/10.48550/arxiv.0902.3226 https://doi.org/10.1088/1475-7516/2009/07/040 2022-04-01T15:07:32Z All models of dynamical dark energy possess fluctuations, which affect the number of galaxy clusters in the Universe. We have studied the impact of dark energy clustering on the number of clusters using a generalization of the spherical collapse model and the Press-Schechter formalism. Our statistical analysis is performed in a 7-parameter space using the Fisher matrix method, for several hypothetical Sunyaev-Zel'dovich and weak lensing (shear maps) surveys. In some scenarios, the impact of these fluctuations is large enough that their effect could already be detected by existing instruments such as the South Pole Telescope, when its data is combined with WMAP and SDSS. Future observations could go much further and probe the nature of dark energy by distinguishing between different models on the basis of their perturbations, not only their expansion histories. : 5 pages, 4 figures Text South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
spellingShingle |
Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences Abramo, L. Raul Batista, Ronaldo C. Rosenfeld, Rogerio The signature of dark energy perturbations in galaxy cluster surveys |
topic_facet |
Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
description |
All models of dynamical dark energy possess fluctuations, which affect the number of galaxy clusters in the Universe. We have studied the impact of dark energy clustering on the number of clusters using a generalization of the spherical collapse model and the Press-Schechter formalism. Our statistical analysis is performed in a 7-parameter space using the Fisher matrix method, for several hypothetical Sunyaev-Zel'dovich and weak lensing (shear maps) surveys. In some scenarios, the impact of these fluctuations is large enough that their effect could already be detected by existing instruments such as the South Pole Telescope, when its data is combined with WMAP and SDSS. Future observations could go much further and probe the nature of dark energy by distinguishing between different models on the basis of their perturbations, not only their expansion histories. : 5 pages, 4 figures |
format |
Text |
author |
Abramo, L. Raul Batista, Ronaldo C. Rosenfeld, Rogerio |
author_facet |
Abramo, L. Raul Batista, Ronaldo C. Rosenfeld, Rogerio |
author_sort |
Abramo, L. Raul |
title |
The signature of dark energy perturbations in galaxy cluster surveys |
title_short |
The signature of dark energy perturbations in galaxy cluster surveys |
title_full |
The signature of dark energy perturbations in galaxy cluster surveys |
title_fullStr |
The signature of dark energy perturbations in galaxy cluster surveys |
title_full_unstemmed |
The signature of dark energy perturbations in galaxy cluster surveys |
title_sort |
signature of dark energy perturbations in galaxy cluster surveys |
publisher |
arXiv |
publishDate |
2009 |
url |
https://dx.doi.org/10.48550/arxiv.0902.3226 https://arxiv.org/abs/0902.3226 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1088/1475-7516/2009/07/040 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.0902.3226 https://doi.org/10.1088/1475-7516/2009/07/040 |
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1766201820173041664 |