NAGIOS: RODERIC FUNCIONANDO

Self-accelerating solutions of scalar-tensor gravity

Repositori DSpace/Manakin

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

Self-accelerating solutions of scalar-tensor gravity

Mostra el registre parcial de l'element

dc.contributor.author Barenboim Szuchman, Gabriela Alejandra
dc.contributor.author Lykken, Joseph
dc.date.accessioned 2015-04-28T08:08:34Z
dc.date.available 2015-04-28T08:08:34Z
dc.date.issued 2008
dc.identifier.citation Barenboim Szuchman, Gabriela Alejandra Lykken, Joseph 2008 Self-accelerating solutions of scalar-tensor gravity Journal Of Cosmology And Astroparticle Physics 08 3 017
dc.identifier.uri http://hdl.handle.net/10550/43455
dc.description.abstract Scalar-tensor gravity is the simplest and best understood modification of general relativity, consisting of a real scalar field coupled directly to the Ricci scalar curvature. Models of this type have self-accelerating solutions. In an example inspired by string dilaton couplings, scalar-tensor gravity coupled to ordinary matter exhibits a de Sitter type expansion, even in the presence of a {\it negative} cosmological constant whose magnitude exceeds that of the matter density. This unusual behavior does not require phantoms, ghosts or other exotic sources. More generally, we show that any expansion history can be interpreted as arising partly or entirely from scalar-tensor gravity. To distinguish any quintessence or inflation model from its scalar-tensor variants, we use the fact that scalar-tensor models imply deviations of the post-Newtonian parameters of general relativity, and time variation of the Newton's gravitational coupling G. We emphasize that next-generation probes of modified GR and the time variation of G are an essential complement to dark energy probes based on luminosity-distance measurements.
dc.language.iso eng
dc.relation.ispartof Journal Of Cosmology And Astroparticle Physics, 2008, vol. 08, num. 3, p. 017
dc.subject Física
dc.subject Astrofísica
dc.title Self-accelerating solutions of scalar-tensor gravity
dc.type journal article es_ES
dc.date.updated 2015-04-28T08:08:35Z
dc.identifier.doi 10.1088/1475-7516/2008/03/017
dc.identifier.idgrec 049678
dc.rights.accessRights open access es_ES

Visualització       (148.3Kb)

Aquest element apareix en la col·lecció o col·leccions següent(s)

Mostra el registre parcial de l'element

Cerca a RODERIC

Cerca avançada

Visualitza

Estadístiques