dc.date.accessioned | 2017-08-15T13:07:46Z | |
dc.date.available | 2017-08-15T13:07:46Z | |
dc.date.created | 2012-09-21T15:05:35Z | |
dc.date.issued | 2012 | |
dc.identifier.citation | Harko, T. Koivisto, Tomi Sebastian Lobo, F. S. N. Olmo, G. J. . Metric-Palatini gravity unifying local constraints and late-time cosmic acceleration. Physical Review D. Particles and fields. 2012, 85(8) | |
dc.identifier.uri | http://hdl.handle.net/10852/57048 | |
dc.description.abstract | We present a novel approach to modified theories of gravity which consists of adding to the Einstein-Hilbert Lagrangian an f(R) term constructed à la Palatini. Using the respective dynamically equivalent scalar-tensor representation, we show that the theory can pass the Solar System observational constraints even if the scalar field is very light. This implies the existence of a long-range scalar field, which is able to modify the cosmological and galactic dynamics but leaves the Solar System unaffected. We also verify the absence of instabilities in perturbations and provide explicit models which are consistent with local tests and lead to the late-time cosmic acceleration.
© 2012 American Physical Society | en_US |
dc.language | EN | |
dc.publisher | American Physical Society | |
dc.title | Metric-Palatini gravity unifying local constraints and late-time cosmic acceleration | en_US |
dc.type | Journal article | en_US |
dc.creator.author | Harko, T. | |
dc.creator.author | Koivisto, Tomi Sebastian | |
dc.creator.author | Lobo, F. S. N. | |
dc.creator.author | Olmo, G. J. | |
cristin.unitcode | 185,15,3,0 | |
cristin.unitname | Institutt for teoretisk astrofysikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 0 | |
dc.identifier.cristin | 945730 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical Review D. Particles and fields&rft.volume=85&rft.spage=&rft.date=2012 | |
dc.identifier.jtitle | Physical Review D. Particles and fields | |
dc.identifier.volume | 85 | |
dc.identifier.issue | 8 | |
dc.identifier.pagecount | 5 | |
dc.identifier.doi | http://dx.doi.org/10.1103/PhysRevD.85.084016 | |
dc.identifier.urn | URN:NBN:no-59791 | |
dc.type.document | Tidsskriftartikkel | en_US |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0556-2821 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/57048/1/PhysRevD.85.084016.pdf | |
dc.type.version | PublishedVersion | |