Constraining the Evolution of Dark Energy with a Combination of Galaxy Cluster Observables
We show that the abundance and redshift distribution ($dN/dz$) of galaxy clusters in future high--yield cluster surveys, combined with the spatial power spectrum ($P_c(k)$) of the same clusters, can place significant constraints on the evolution of the dark energy equation of state, $w=w(a)$. We eva...
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ftdatacite:10.48550/arxiv.astro-ph/0406331 2023-05-15T18:23:08+02:00 Constraining the Evolution of Dark Energy with a Combination of Galaxy Cluster Observables Wang, Sheng Khoury, Justin Haiman, Zoltan May, Morgan 2004 https://dx.doi.org/10.48550/arxiv.astro-ph/0406331 https://arxiv.org/abs/astro-ph/0406331 unknown arXiv https://dx.doi.org/10.1103/physrevd.70.123008 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 2004 ftdatacite https://doi.org/10.48550/arxiv.astro-ph/0406331 https://doi.org/10.1103/physrevd.70.123008 2022-04-01T16:29:12Z We show that the abundance and redshift distribution ($dN/dz$) of galaxy clusters in future high--yield cluster surveys, combined with the spatial power spectrum ($P_c(k)$) of the same clusters, can place significant constraints on the evolution of the dark energy equation of state, $w=w(a)$. We evaluate the expected errors on $w_a=-dw/da$ and other cosmological parameters using a Fisher matrix approach, and simultaneously including cluster structure evolution parameters in our analysis. We study three different types of forthcoming surveys that will identify clusters based on their X-ray emission (such as DUO, the Dark Universe Observatory), their Sunyaev--Zel'dovich (SZ) decrement (such as SPT, the South Pole Telescope), or their weak lensing (WL) shear (such as LSST, the Large Synoptic Survey Telescope). We find that combining the cluster abundance and power spectrum significantly enhances constraints from either method alone. We show that the weak-lensing survey can deliver a constraint as tight as $Δw_a \sim 0.1$ on the evolution of the dark energy equation of state, and that the X-ray and SZ surveys each yield $Δw_a \sim 0.4$ separately, or $Δw_a \sim 0.2$ when these two surveys are combined. For the X-ray and SZ surveys, constraints on dark energy parameters are improved by a factor of two by combining the cluster data with cosmic microwave background (CMB) anisotropy measurements by Planck, but degrade by a factor of two if the survey is required to solve simultaneously for cosmological and cluster structure evolution parameters. The constraint on $w_a$ from the weak lensing survey is improved by $\sim 25$% with the addition of Planck data. : 13 pages. v2: Expanded discussion of weak lensing survey (LSST), improved CMB analysis, references added, final version published in PRD Text South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole |
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Astrophysics astro-ph FOS Physical sciences |
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Astrophysics astro-ph FOS Physical sciences Wang, Sheng Khoury, Justin Haiman, Zoltan May, Morgan Constraining the Evolution of Dark Energy with a Combination of Galaxy Cluster Observables |
topic_facet |
Astrophysics astro-ph FOS Physical sciences |
description |
We show that the abundance and redshift distribution ($dN/dz$) of galaxy clusters in future high--yield cluster surveys, combined with the spatial power spectrum ($P_c(k)$) of the same clusters, can place significant constraints on the evolution of the dark energy equation of state, $w=w(a)$. We evaluate the expected errors on $w_a=-dw/da$ and other cosmological parameters using a Fisher matrix approach, and simultaneously including cluster structure evolution parameters in our analysis. We study three different types of forthcoming surveys that will identify clusters based on their X-ray emission (such as DUO, the Dark Universe Observatory), their Sunyaev--Zel'dovich (SZ) decrement (such as SPT, the South Pole Telescope), or their weak lensing (WL) shear (such as LSST, the Large Synoptic Survey Telescope). We find that combining the cluster abundance and power spectrum significantly enhances constraints from either method alone. We show that the weak-lensing survey can deliver a constraint as tight as $Δw_a \sim 0.1$ on the evolution of the dark energy equation of state, and that the X-ray and SZ surveys each yield $Δw_a \sim 0.4$ separately, or $Δw_a \sim 0.2$ when these two surveys are combined. For the X-ray and SZ surveys, constraints on dark energy parameters are improved by a factor of two by combining the cluster data with cosmic microwave background (CMB) anisotropy measurements by Planck, but degrade by a factor of two if the survey is required to solve simultaneously for cosmological and cluster structure evolution parameters. The constraint on $w_a$ from the weak lensing survey is improved by $\sim 25$% with the addition of Planck data. : 13 pages. v2: Expanded discussion of weak lensing survey (LSST), improved CMB analysis, references added, final version published in PRD |
format |
Text |
author |
Wang, Sheng Khoury, Justin Haiman, Zoltan May, Morgan |
author_facet |
Wang, Sheng Khoury, Justin Haiman, Zoltan May, Morgan |
author_sort |
Wang, Sheng |
title |
Constraining the Evolution of Dark Energy with a Combination of Galaxy Cluster Observables |
title_short |
Constraining the Evolution of Dark Energy with a Combination of Galaxy Cluster Observables |
title_full |
Constraining the Evolution of Dark Energy with a Combination of Galaxy Cluster Observables |
title_fullStr |
Constraining the Evolution of Dark Energy with a Combination of Galaxy Cluster Observables |
title_full_unstemmed |
Constraining the Evolution of Dark Energy with a Combination of Galaxy Cluster Observables |
title_sort |
constraining the evolution of dark energy with a combination of galaxy cluster observables |
publisher |
arXiv |
publishDate |
2004 |
url |
https://dx.doi.org/10.48550/arxiv.astro-ph/0406331 https://arxiv.org/abs/astro-ph/0406331 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1103/physrevd.70.123008 |
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/0406331 https://doi.org/10.1103/physrevd.70.123008 |
_version_ |
1766202565108695040 |