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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.citation | 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.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.subject | Cosmologia | |
| dc.subject | Relativitat (Física) | |
| dc.title | Potential perturbation to Friedmann universes | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2019-01-15T13:45:50Z | |
| dc.identifier.doi | 10.1103/PhysRevD.50.2567 | |
| dc.identifier.idgrec | 129384 | |
| dc.rights.accessRights | open access | es_ES |
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