Potential perturbation to Friedmann universes
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Potential perturbation to Friedmann universes

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Potential perturbation to Friedmann universes

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dc.contributor.author Ferrando Bargues, Joan J.
dc.contributor.author Morales Lladosa, Juan Antonio
dc.contributor.author Portilla Moll, Miquel
dc.date.accessioned 2019-01-15T13:45:50Z
dc.date.available 2019-01-15T13:45:50Z
dc.date.issued 1994
dc.identifier.uri http://hdl.handle.net/10550/68477
dc.description.abstract The energy-momentum tensor of perturbed Friedmann universes in the longitudinal gauge (depending on only one gravitational potential) is obtained in order to clarify the physical meaning of two important cases: (1) conformally static perturbations (when the potential is independent of time), and (2) nonstatic perturbations in the case where the potential allows a particular separation of time and space coordinates. The statement according to which the longitudinal gauge allows a description of high-density-contrast regions is analyzed. In the conformally static case we suggest interpreting the energy-momentum tensor as representing a set of particles in gravitational interaction, suitable for describing the post-recombination epoch. It is suggested that the second case be interpreted as a plasma in equilibrium with radiation, suitable for describing the period just before the recombination epoch.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 1994, vol. 50, num. 4, p. 2567-2571
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Ferrando Bargues, Joan J. Morales Lladosa, Juan Antonio Portilla Moll, Miquel 1994 Potential perturbation to Friedmann universes Physical Review D 50 4 2567 2571
dc.subject Cosmologia
dc.subject Relativitat (Física)
dc.title Potential perturbation to Friedmann universes
dc.type info:eu-repo/semantics/article
dc.date.updated 2019-01-15T13:45:50Z
dc.identifier.doi https://doi.org/10.1103/PhysRevD.50.2567
dc.identifier.idgrec 129384

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