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Homogeneous and isotropic big rips?

We investigate the way big rips are approached in a fully inhomogeneous description of the space-time geometry. If the pressure and energy densities are connected by a (supernegative) barotropic index, the spatial gradients and the anisotropic expansion decay as the big rip is approached. This behav...

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Autor principal: Giovannini, Massimo
Lenguaje:eng
Publicado: 2005
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.72.083508
http://cds.cern.ch/record/855290
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author Giovannini, Massimo
author_facet Giovannini, Massimo
author_sort Giovannini, Massimo
collection CERN
description We investigate the way big rips are approached in a fully inhomogeneous description of the space-time geometry. If the pressure and energy densities are connected by a (supernegative) barotropic index, the spatial gradients and the anisotropic expansion decay as the big rip is approached. This behaviour is contrasted with the usual big-bang singularities. A similar analysis is performed in the case of sudden (quiescent) singularities and it is argued that the spatial gradients may well be non-negligible in the vicinity of pressure singularities.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2005
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spelling cern-8552902023-03-14T19:12:49Zdoi:10.1103/PhysRevD.72.083508http://cds.cern.ch/record/855290engGiovannini, MassimoHomogeneous and isotropic big rips?Astrophysics and AstronomyWe investigate the way big rips are approached in a fully inhomogeneous description of the space-time geometry. If the pressure and energy densities are connected by a (supernegative) barotropic index, the spatial gradients and the anisotropic expansion decay as the big rip is approached. This behaviour is contrasted with the usual big-bang singularities. A similar analysis is performed in the case of sudden (quiescent) singularities and it is argued that the spatial gradients may well be non-negligible in the vicinity of pressure singularities.We investigate the way big rips are approached in a fully inhomogeneous description of the space-time geometry. If the pressure and energy densities are connected by a (supernegative) barotropic index, the spatial gradients and the anisotropic expansion decay as the big rip is approached. This behaviour is contrasted with the usual big-bang singularities. A similar analysis is performed in the case of sudden (quiescent) singularities and it is argued that the spatial gradients may well be non-negligible in the vicinity of pressure singularities.astro-ph/0507369CERN-PH-TH-2005-132CERN-PH-TH-2005-132oai:cds.cern.ch:8552902005-07-15
spellingShingle Astrophysics and Astronomy
Giovannini, Massimo
Homogeneous and isotropic big rips?
title Homogeneous and isotropic big rips?
title_full Homogeneous and isotropic big rips?
title_fullStr Homogeneous and isotropic big rips?
title_full_unstemmed Homogeneous and isotropic big rips?
title_short Homogeneous and isotropic big rips?
title_sort homogeneous and isotropic big rips?
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1103/PhysRevD.72.083508
http://cds.cern.ch/record/855290
work_keys_str_mv AT giovanninimassimo homogeneousandisotropicbigrips