Structure of compact stars in R-squared Palatini gravity

Autores
Teppa Pannia, Florencia A.; García, Federico; Perez Bergliaffa, Santiago E.; Orellana, Mariana Dominga; Romero, Gustavo E.
Año de publicación
2016
Idioma
español castellano
Tipo de recurso
artículo
Estado
versión aceptada
Descripción
Fil: Teppa Pannia, Florencia A. Comisión de Investigaciones Científicas; Argentina
Fil: Teppa Pannia, Florencia A. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Teppa Pannia, Florencia A. Instituto Argentino de Radioastronomía; Argentina
Fil: García, Federico. Comisión de Investigaciones Científicas; Argentina
Fil: García, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: García, Federico. Instituto Argentino de Radioastronomía; Argentina
Fil: Perez Bergliaffa, Santiago E. Universidade Do Estado Do Rio de Janeiro; Brasil
Fil: Orellana, Mariana D. Universidad Nacional de Rio Negro. Sede Andina; Argentina
Fil: Romero, Gustavo E. Comisión de Investigaciones Científicas; Argentina
Fil: Romero, Gustavo E. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Romero, Gustavo E. Instituto Argentino de Radioastronomia; Argentina
We analyse configurations of neutron stars in the so-called R-squared gravity in the Palatini formalism. Using a realistic equation of state we show that the mass-radius configurations are lighter than their counterparts in General Relativity. We also obtain the internal profiles, which run in strong correlation with the derivatives of the equation of state, leading to regions where the mass parameter decreases with the radial coordinate in a counter-intuitive way. In order to analyse such correlation, we introduce a parametrisation of the equation of state given by multiple polytropes, which allows us to explicitly control its derivatives. We show that, even in a limiting case where hard phase transitions in matter are allowed, the internal profile of the mass parameter still presents strange features and the calculated M −R configurations also yield neutron stars lighter than those obtained in General Relativity.
Materia
Ciencias Físicas
Modified Gravity
Palatini Formalism
Neutron Stars
Equation of State
Ciencias Físicas
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
RID-UNRN (UNRN)
Institución
Universidad Nacional de Río Negro
OAI Identificador
oai:rid.unrn.edu.ar:20.500.12049/2830
Acceder
id RIDUNRN_154655d65e081767097cb88e5e1b0f95
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network_acronym_str RIDUNRN
repository_id_str 4369
network_name_str RID-UNRN (UNRN)
spelling Structure of compact stars in R-squared Palatini gravityTeppa Pannia, Florencia A.García, FedericoPerez Bergliaffa, Santiago E.Orellana, Mariana DomingaRomero, Gustavo E.Ciencias FísicasModified GravityPalatini FormalismNeutron StarsEquation of StateCiencias FísicasFil: Teppa Pannia, Florencia A. Comisión de Investigaciones Científicas; ArgentinaFil: Teppa Pannia, Florencia A. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Teppa Pannia, Florencia A. Instituto Argentino de Radioastronomía; ArgentinaFil: García, Federico. Comisión de Investigaciones Científicas; ArgentinaFil: García, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: García, Federico. Instituto Argentino de Radioastronomía; ArgentinaFil: Perez Bergliaffa, Santiago E. Universidade Do Estado Do Rio de Janeiro; BrasilFil: Orellana, Mariana D. Universidad Nacional de Rio Negro. Sede Andina; ArgentinaFil: Romero, Gustavo E. Comisión de Investigaciones Científicas; ArgentinaFil: Romero, Gustavo E. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Romero, Gustavo E. Instituto Argentino de Radioastronomia; ArgentinaWe analyse configurations of neutron stars in the so-called R-squared gravity in the Palatini formalism. Using a realistic equation of state we show that the mass-radius configurations are lighter than their counterparts in General Relativity. We also obtain the internal profiles, which run in strong correlation with the derivatives of the equation of state, leading to regions where the mass parameter decreases with the radial coordinate in a counter-intuitive way. In order to analyse such correlation, we introduce a parametrisation of the equation of state given by multiple polytropes, which allows us to explicitly control its derivatives. We show that, even in a limiting case where hard phase transitions in matter are allowed, the internal profile of the mass parameter still presents strange features and the calculated M −R configurations also yield neutron stars lighter than those obtained in General Relativity.2016-12-22info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfTeppa Pannia, Florencia A., García, Federico., Perez Bergliaffa, Santiago E., Orellana, Mariana D. & Romero, Gustavo E. (2016). Structure of compact stars in R-squared Palatini gravity. Springer/Plenum Publishers; General Relativity And Gravitation; 49; 2; 1-140001-7701http://link.springer.com/article/10.1007/s10714-016-2182-7http://dx.doi.org/10.1007/s10714-016-2182-7http://hdl.handle.net/11336/63359https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2830spaGeneral Relativity And Gravitationinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/reponame:RID-UNRN (UNRN)instname:Universidad Nacional de Río Negro2025-09-29T14:29:19Zoai:rid.unrn.edu.ar:20.500.12049/2830instacron:UNRNInstitucionalhttps://rid.unrn.edu.ar/jspui/Universidad públicaNo correspondehttps://rid.unrn.edu.ar/oai/snrdrid@unrn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:43692025-09-29 14:29:20.099RID-UNRN (UNRN) - Universidad Nacional de Río Negrofalse
dc.title.none.fl_str_mv Structure of compact stars in R-squared Palatini gravity
title Structure of compact stars in R-squared Palatini gravity
spellingShingle Structure of compact stars in R-squared Palatini gravity
Teppa Pannia, Florencia A.
Ciencias Físicas
Modified Gravity
Palatini Formalism
Neutron Stars
Equation of State
Ciencias Físicas
title_short Structure of compact stars in R-squared Palatini gravity
title_full Structure of compact stars in R-squared Palatini gravity
title_fullStr Structure of compact stars in R-squared Palatini gravity
title_full_unstemmed Structure of compact stars in R-squared Palatini gravity
title_sort Structure of compact stars in R-squared Palatini gravity
dc.creator.none.fl_str_mv Teppa Pannia, Florencia A.
García, Federico
Perez Bergliaffa, Santiago E.
Orellana, Mariana Dominga
Romero, Gustavo E.
author Teppa Pannia, Florencia A.
author_facet Teppa Pannia, Florencia A.
García, Federico
Perez Bergliaffa, Santiago E.
Orellana, Mariana Dominga
Romero, Gustavo E.
author_role author
author2 García, Federico
Perez Bergliaffa, Santiago E.
Orellana, Mariana Dominga
Romero, Gustavo E.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Físicas
Modified Gravity
Palatini Formalism
Neutron Stars
Equation of State
Ciencias Físicas
topic Ciencias Físicas
Modified Gravity
Palatini Formalism
Neutron Stars
Equation of State
Ciencias Físicas
dc.description.none.fl_txt_mv Fil: Teppa Pannia, Florencia A. Comisión de Investigaciones Científicas; Argentina
Fil: Teppa Pannia, Florencia A. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Teppa Pannia, Florencia A. Instituto Argentino de Radioastronomía; Argentina
Fil: García, Federico. Comisión de Investigaciones Científicas; Argentina
Fil: García, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: García, Federico. Instituto Argentino de Radioastronomía; Argentina
Fil: Perez Bergliaffa, Santiago E. Universidade Do Estado Do Rio de Janeiro; Brasil
Fil: Orellana, Mariana D. Universidad Nacional de Rio Negro. Sede Andina; Argentina
Fil: Romero, Gustavo E. Comisión de Investigaciones Científicas; Argentina
Fil: Romero, Gustavo E. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Romero, Gustavo E. Instituto Argentino de Radioastronomia; Argentina
We analyse configurations of neutron stars in the so-called R-squared gravity in the Palatini formalism. Using a realistic equation of state we show that the mass-radius configurations are lighter than their counterparts in General Relativity. We also obtain the internal profiles, which run in strong correlation with the derivatives of the equation of state, leading to regions where the mass parameter decreases with the radial coordinate in a counter-intuitive way. In order to analyse such correlation, we introduce a parametrisation of the equation of state given by multiple polytropes, which allows us to explicitly control its derivatives. We show that, even in a limiting case where hard phase transitions in matter are allowed, the internal profile of the mass parameter still presents strange features and the calculated M −R configurations also yield neutron stars lighter than those obtained in General Relativity.
description Fil: Teppa Pannia, Florencia A. Comisión de Investigaciones Científicas; Argentina
publishDate 2016
dc.date.none.fl_str_mv 2016-12-22
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv Teppa Pannia, Florencia A., García, Federico., Perez Bergliaffa, Santiago E., Orellana, Mariana D. & Romero, Gustavo E. (2016). Structure of compact stars in R-squared Palatini gravity. Springer/Plenum Publishers; General Relativity And Gravitation; 49; 2; 1-14
0001-7701
http://link.springer.com/article/10.1007/s10714-016-2182-7
http://dx.doi.org/10.1007/s10714-016-2182-7
http://hdl.handle.net/11336/63359
https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2830
identifier_str_mv Teppa Pannia, Florencia A., García, Federico., Perez Bergliaffa, Santiago E., Orellana, Mariana D. & Romero, Gustavo E. (2016). Structure of compact stars in R-squared Palatini gravity. Springer/Plenum Publishers; General Relativity And Gravitation; 49; 2; 1-14
0001-7701
url http://link.springer.com/article/10.1007/s10714-016-2182-7
http://dx.doi.org/10.1007/s10714-016-2182-7
http://hdl.handle.net/11336/63359
https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2830
dc.language.none.fl_str_mv spa
language spa
dc.relation.none.fl_str_mv General Relativity And Gravitation
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/4.0/
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:RID-UNRN (UNRN)
instname:Universidad Nacional de Río Negro
reponame_str RID-UNRN (UNRN)
collection RID-UNRN (UNRN)
instname_str Universidad Nacional de Río Negro
repository.name.fl_str_mv RID-UNRN (UNRN) - Universidad Nacional de Río Negro
repository.mail.fl_str_mv rid@unrn.edu.ar
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score 12.558318

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