Solar System tests and chameleon effect in f(R) gravity

Using a novel and self-consistent approach that avoids the scalar-tensor identification in the Einstein frame, we reanalyze the viability of f(R) gravity within the context of solar-system tests. In order to do so, we depart from a simple but fully relativistic system of differential equations that...

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Autores principales: Negrelli, Carolina Soledad, Kraiselburd, Lucila, Landau, Susana Judith, Salgado, Marcelo
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Astronómicas
Astronomía
Spherically symmetric spacetime
Chameleon effect
f(R) gravity
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125301
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125301
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Astronomía
Spherically symmetric spacetime
Chameleon effect
f(R) gravity
spellingShingle Ciencias Astronómicas
Astronomía
Spherically symmetric spacetime
Chameleon effect
f(R) gravity
Negrelli, Carolina Soledad
Kraiselburd, Lucila
Landau, Susana Judith
Salgado, Marcelo
Solar System tests and chameleon effect in f(R) gravity
topic_facet Ciencias Astronómicas
Astronomía
Spherically symmetric spacetime
Chameleon effect
f(R) gravity
description Using a novel and self-consistent approach that avoids the scalar-tensor identification in the Einstein frame, we reanalyze the viability of f(R) gravity within the context of solar-system tests. In order to do so, we depart from a simple but fully relativistic system of differential equations that describe a compact object in a static and spherically symmetric spacetime, and then make suitable linearizations that apply to non-relativistic objects such as the Sun. We then show clearly under which conditions the emerging chameleon-like mechanism can lead to a Post-Newtonian Parameter γ compatible with the observational bounds. To illustrate this method, we use several specific f(R) models proposed to explain the current acceleration of the Universe, and we show which of them are able to satisfy those bounds.
format Articulo
Preprint
author Negrelli, Carolina Soledad
Kraiselburd, Lucila
Landau, Susana Judith
Salgado, Marcelo
author_facet Negrelli, Carolina Soledad
Kraiselburd, Lucila
Landau, Susana Judith
Salgado, Marcelo
author_sort Negrelli, Carolina Soledad
title Solar System tests and chameleon effect in f(R) gravity
title_short Solar System tests and chameleon effect in f(R) gravity
title_full Solar System tests and chameleon effect in f(R) gravity
title_fullStr Solar System tests and chameleon effect in f(R) gravity
title_full_unstemmed Solar System tests and chameleon effect in f(R) gravity
title_sort solar system tests and chameleon effect in f(r) gravity
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/125301
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AT kraiselburdlucila solarsystemtestsandchameleoneffectinfrgravity
AT landaususanajudith solarsystemtestsandchameleoneffectinfrgravity
AT salgadomarcelo solarsystemtestsandchameleoneffectinfrgravity
bdutipo_str Repositorios
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