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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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Lenguaje: | eng |
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2005
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Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.72.083508 http://cds.cern.ch/record/855290 |
_version_ | 1780907042939076608 |
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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. |
id | cern-855290 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2005 |
record_format | invenio |
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 |