Constraints on the dark energy equation of state from the imprint of baryons on the power spectrum of clusters
Acoustic oscillations in the baryon-photon fluid leave a signature in the matter power spectrum. The overall shape of the spectrum and the wavelength of the oscillations depend upon the sound horizon scale at recombination. Using the $\Lambda$ cold dark matter Hubble Volume simulation, we show that...
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ftcern:oai:cds.cern.ch:847390 2023-05-15T18:22:39+02:00 Constraints on the dark energy equation of state from the imprint of baryons on the power spectrum of clusters Angulo, R Baugh, C M Frenk, C S Bower, R G Jenkins, A Morris, S L 2005-04-21 http://cds.cern.ch/record/847390 eng eng http://cds.cern.ch/record/847390 astro-ph/0504456 oai:cds.cern.ch:847390 Astrophysics and Astronomy 2005 ftcern 2018-07-28T07:31:10Z Acoustic oscillations in the baryon-photon fluid leave a signature in the matter power spectrum. The overall shape of the spectrum and the wavelength of the oscillations depend upon the sound horizon scale at recombination. Using the $\Lambda$ cold dark matter Hubble Volume simulation, we show that the imprint of baryons is visible in the power spectrum of cluster-mass dark matter haloes, in spite of significant differences between the halo power spectrum and the prediction of linear perturbation theory. A measurement of the sound horizon scale can constrain the dark energy equation of state. We show that a survey of clusters at intermediate redshift ($ z\sim1 $), like the Sunyaev-Zeldovich survey proposed by the South Pole Telescope or a red sequence photometric survey with VISTA, could potentially constrain the sound horizon scale to an accuracy of $\sim 2%$, in turn fixing the ratio of the pressure of the dark energy to its density ($w$) to better than $\sim 10%$. Our approach does not require knowledge of the cluster mass, unlike those that depend upon the abundance of clusters. Other/Unknown Material South pole CERN Document Server (CDS) Hubble ENVELOPE(158.317,158.317,-80.867,-80.867) Lambda ENVELOPE(-62.983,-62.983,-64.300,-64.300) South Pole |
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CERN Document Server (CDS) |
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ftcern |
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English |
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Astrophysics and Astronomy |
spellingShingle |
Astrophysics and Astronomy Angulo, R Baugh, C M Frenk, C S Bower, R G Jenkins, A Morris, S L Constraints on the dark energy equation of state from the imprint of baryons on the power spectrum of clusters |
topic_facet |
Astrophysics and Astronomy |
description |
Acoustic oscillations in the baryon-photon fluid leave a signature in the matter power spectrum. The overall shape of the spectrum and the wavelength of the oscillations depend upon the sound horizon scale at recombination. Using the $\Lambda$ cold dark matter Hubble Volume simulation, we show that the imprint of baryons is visible in the power spectrum of cluster-mass dark matter haloes, in spite of significant differences between the halo power spectrum and the prediction of linear perturbation theory. A measurement of the sound horizon scale can constrain the dark energy equation of state. We show that a survey of clusters at intermediate redshift ($ z\sim1 $), like the Sunyaev-Zeldovich survey proposed by the South Pole Telescope or a red sequence photometric survey with VISTA, could potentially constrain the sound horizon scale to an accuracy of $\sim 2%$, in turn fixing the ratio of the pressure of the dark energy to its density ($w$) to better than $\sim 10%$. Our approach does not require knowledge of the cluster mass, unlike those that depend upon the abundance of clusters. |
author |
Angulo, R Baugh, C M Frenk, C S Bower, R G Jenkins, A Morris, S L |
author_facet |
Angulo, R Baugh, C M Frenk, C S Bower, R G Jenkins, A Morris, S L |
author_sort |
Angulo, R |
title |
Constraints on the dark energy equation of state from the imprint of baryons on the power spectrum of clusters |
title_short |
Constraints on the dark energy equation of state from the imprint of baryons on the power spectrum of clusters |
title_full |
Constraints on the dark energy equation of state from the imprint of baryons on the power spectrum of clusters |
title_fullStr |
Constraints on the dark energy equation of state from the imprint of baryons on the power spectrum of clusters |
title_full_unstemmed |
Constraints on the dark energy equation of state from the imprint of baryons on the power spectrum of clusters |
title_sort |
constraints on the dark energy equation of state from the imprint of baryons on the power spectrum of clusters |
publishDate |
2005 |
url |
http://cds.cern.ch/record/847390 |
long_lat |
ENVELOPE(158.317,158.317,-80.867,-80.867) ENVELOPE(-62.983,-62.983,-64.300,-64.300) |
geographic |
Hubble Lambda South Pole |
geographic_facet |
Hubble Lambda South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
http://cds.cern.ch/record/847390 astro-ph/0504456 oai:cds.cern.ch:847390 |
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1766202059752734720 |