Probing Modified Gravity by Combining Supernovae and Galaxy Cluster Surveys
Possible explanations of the observed accelerated expansion of the Universe are the introduction of a dark energy component or the modifications of gravity at large distances. A particular difference between these scenarios is the dynamics of the growth of structures. The redshift distribution of ga...
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ftcern:oai:cds.cern.ch:981483 2023-05-15T18:22:29+02:00 Probing Modified Gravity by Combining Supernovae and Galaxy Cluster Surveys Tang, J Y Weller, J Zablocki, A 2006-09-01 http://cds.cern.ch/record/981483 eng eng http://cds.cern.ch/record/981483 astro-ph/0609028 oai:cds.cern.ch:981483 Astrophysics and Astronomy 2006 ftcern 2018-07-28T08:28:37Z Possible explanations of the observed accelerated expansion of the Universe are the introduction of a dark energy component or the modifications of gravity at large distances. A particular difference between these scenarios is the dynamics of the growth of structures. The redshift distribution of galaxy clusters will probe this growth of structures with large precision. Here we will investigate how proposed galaxy cluster surveys will allow one to distinguish the modified gravity scenarios from dark energy models. We find that cluster counts can distinguish the Dvali-Gabadadze-Porrati model from a dark energy model, which has the same background evolution, as long as the amplitude of the primordial power spectrum is constrained by a CMB experiment like Planck. In order to achieve this, only a couple of hundred clusters in bins of width Delta-z = 0.1 are required. This should be easily achievable with forthcoming Sunyaev-Zel'dovich cluster counts, such as the South Pole Telescope in conjunction with the Dark Energy Survey. Other/Unknown Material South pole CERN Document Server (CDS) South Pole |
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CERN Document Server (CDS) |
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English |
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Astrophysics and Astronomy |
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Astrophysics and Astronomy Tang, J Y Weller, J Zablocki, A Probing Modified Gravity by Combining Supernovae and Galaxy Cluster Surveys |
topic_facet |
Astrophysics and Astronomy |
description |
Possible explanations of the observed accelerated expansion of the Universe are the introduction of a dark energy component or the modifications of gravity at large distances. A particular difference between these scenarios is the dynamics of the growth of structures. The redshift distribution of galaxy clusters will probe this growth of structures with large precision. Here we will investigate how proposed galaxy cluster surveys will allow one to distinguish the modified gravity scenarios from dark energy models. We find that cluster counts can distinguish the Dvali-Gabadadze-Porrati model from a dark energy model, which has the same background evolution, as long as the amplitude of the primordial power spectrum is constrained by a CMB experiment like Planck. In order to achieve this, only a couple of hundred clusters in bins of width Delta-z = 0.1 are required. This should be easily achievable with forthcoming Sunyaev-Zel'dovich cluster counts, such as the South Pole Telescope in conjunction with the Dark Energy Survey. |
author |
Tang, J Y Weller, J Zablocki, A |
author_facet |
Tang, J Y Weller, J Zablocki, A |
author_sort |
Tang, J Y |
title |
Probing Modified Gravity by Combining Supernovae and Galaxy Cluster Surveys |
title_short |
Probing Modified Gravity by Combining Supernovae and Galaxy Cluster Surveys |
title_full |
Probing Modified Gravity by Combining Supernovae and Galaxy Cluster Surveys |
title_fullStr |
Probing Modified Gravity by Combining Supernovae and Galaxy Cluster Surveys |
title_full_unstemmed |
Probing Modified Gravity by Combining Supernovae and Galaxy Cluster Surveys |
title_sort |
probing modified gravity by combining supernovae and galaxy cluster surveys |
publishDate |
2006 |
url |
http://cds.cern.ch/record/981483 |
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South Pole |
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South Pole |
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South pole |
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South pole |
op_relation |
http://cds.cern.ch/record/981483 astro-ph/0609028 oai:cds.cern.ch:981483 |
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1766201900612452352 |