Structure of compact stars in R-squared Palatini gravity

Autores
Teppa Pannia, Florencia Anabella; García, Federico; Perez Bergliaffa, Santiago Esteban; Orellana, Mariana Dominga; Romero, Gustavo Esteban
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Fil: Teppa Pannia, Florencia Anabella. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: García, Federico. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Perez Bergliaffa, Santiago Esteban. Universidade Do Estado Do Rio de Janeiro; Brasil
Fil: Orellana, Mariana Dominga. Universidad Nacional de Rio Negro. Sede Andina; Argentina
Fil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Materia
Modified gravity
Palatini formalism
Neutron stars
Equation of state
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/63359
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Structure of compact stars in R-squared Palatini gravityTeppa Pannia, Florencia AnabellaGarcía, FedericoPerez Bergliaffa, Santiago EstebanOrellana, Mariana DomingaRomero, Gustavo EstebanModified gravityPalatini formalismNeutron starsEquation of statehttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We 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.Fil: Teppa Pannia, Florencia Anabella. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: García, Federico. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Perez Bergliaffa, Santiago Esteban. Universidade Do Estado Do Rio de Janeiro; BrasilFil: Orellana, Mariana Dominga. Universidad Nacional de Rio Negro. Sede Andina; ArgentinaFil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaSpringer/Plenum Publishers2017-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/63359Teppa Pannia, Florencia Anabella; García, Federico; Perez Bergliaffa, Santiago Esteban; Orellana, Mariana Dominga; Romero, Gustavo Esteban; Structure of compact stars in R-squared Palatini gravity; Springer/Plenum Publishers; General Relativity And Gravitation; 49; 2; 2-2017; 1-140001-7701CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1007/s10714-016-2182-7info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007/s10714-016-2182-7info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:29:50Zoai:ri.conicet.gov.ar:11336/63359instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:29:50.747CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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 Anabella
Modified gravity
Palatini formalism
Neutron stars
Equation of state
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 Anabella
García, Federico
Perez Bergliaffa, Santiago Esteban
Orellana, Mariana Dominga
Romero, Gustavo Esteban
author Teppa Pannia, Florencia Anabella
author_facet Teppa Pannia, Florencia Anabella
García, Federico
Perez Bergliaffa, Santiago Esteban
Orellana, Mariana Dominga
Romero, Gustavo Esteban
author_role author
author2 García, Federico
Perez Bergliaffa, Santiago Esteban
Orellana, Mariana Dominga
Romero, Gustavo Esteban
author2_role author
author
author
author
dc.subject.none.fl_str_mv Modified gravity
Palatini formalism
Neutron stars
Equation of state
topic Modified gravity
Palatini formalism
Neutron stars
Equation of state
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv 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.
Fil: Teppa Pannia, Florencia Anabella. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: García, Federico. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Perez Bergliaffa, Santiago Esteban. Universidade Do Estado Do Rio de Janeiro; Brasil
Fil: Orellana, Mariana Dominga. Universidad Nacional de Rio Negro. Sede Andina; Argentina
Fil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
description 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.
publishDate 2017
dc.date.none.fl_str_mv 2017-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/63359
Teppa Pannia, Florencia Anabella; García, Federico; Perez Bergliaffa, Santiago Esteban; Orellana, Mariana Dominga; Romero, Gustavo Esteban; Structure of compact stars in R-squared Palatini gravity; Springer/Plenum Publishers; General Relativity And Gravitation; 49; 2; 2-2017; 1-14
0001-7701
CONICET Digital
CONICET
url http://hdl.handle.net/11336/63359
identifier_str_mv Teppa Pannia, Florencia Anabella; García, Federico; Perez Bergliaffa, Santiago Esteban; Orellana, Mariana Dominga; Romero, Gustavo Esteban; Structure of compact stars in R-squared Palatini gravity; Springer/Plenum Publishers; General Relativity And Gravitation; 49; 2; 2-2017; 1-14
0001-7701
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1007/s10714-016-2182-7
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007/s10714-016-2182-7
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer/Plenum Publishers
publisher.none.fl_str_mv Springer/Plenum Publishers
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.069144

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