Expansion history and f(R) modified gravity

We attempt to fit cosmological data using f(R) modified Lagrangians containing inverse powers of the Ricci scalar varied with respect to the metric. While we can confirm the a ~ t^1/2 behaviour at medium to high redshifts reported elsewhere, we are still able to fit the supernova, CMB and baryon osc...

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Detalles Bibliográficos
Autores principales: Fairbairn, Malcolm, Rydbeck, Sara
Lenguaje:eng
Publicado: 2007
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2007/12/005
http://cds.cern.ch/record/1014382
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author Fairbairn, Malcolm
Rydbeck, Sara
author_facet Fairbairn, Malcolm
Rydbeck, Sara
author_sort Fairbairn, Malcolm
collection CERN
description We attempt to fit cosmological data using f(R) modified Lagrangians containing inverse powers of the Ricci scalar varied with respect to the metric. While we can confirm the a ~ t^1/2 behaviour at medium to high redshifts reported elsewhere, we are still able to fit the supernova, CMB and baryon oscillation data. The age of the universe is also compatible with globular clusters. We show, however, that this class of models can be ruled out by considering the thickness of the last scattering surface.
id cern-1014382
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2007
record_format invenio
spelling cern-10143822023-03-14T20:08:43Zdoi:10.1088/1475-7516/2007/12/005http://cds.cern.ch/record/1014382engFairbairn, MalcolmRydbeck, SaraExpansion history and f(R) modified gravityAstrophysics and AstronomyWe attempt to fit cosmological data using f(R) modified Lagrangians containing inverse powers of the Ricci scalar varied with respect to the metric. While we can confirm the a ~ t^1/2 behaviour at medium to high redshifts reported elsewhere, we are still able to fit the supernova, CMB and baryon oscillation data. The age of the universe is also compatible with globular clusters. We show, however, that this class of models can be ruled out by considering the thickness of the last scattering surface.We attempt to fit cosmological data using f(R) modified Lagrangians containing inverse powers of the Ricci scalar varied with respect to the metric. While we can confirm the a ~ t^1/2 behaviour at medium to high redshifts reported elsewhere, we are still able to fit the supernova, CMB and baryon oscillation data. The age of the universe is also compatible with globular clusters. We show, however, that this class of models can be ruled out by considering the thickness of the last scattering surface.astro-ph/0701900oai:cds.cern.ch:10143822007-01-31
spellingShingle Astrophysics and Astronomy
Fairbairn, Malcolm
Rydbeck, Sara
Expansion history and f(R) modified gravity
title Expansion history and f(R) modified gravity
title_full Expansion history and f(R) modified gravity
title_fullStr Expansion history and f(R) modified gravity
title_full_unstemmed Expansion history and f(R) modified gravity
title_short Expansion history and f(R) modified gravity
title_sort expansion history and f(r) modified gravity
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1088/1475-7516/2007/12/005
http://cds.cern.ch/record/1014382
work_keys_str_mv AT fairbairnmalcolm expansionhistoryandfrmodifiedgravity
AT rydbecksara expansionhistoryandfrmodifiedgravity

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