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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/63359
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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 Técnicas2025-09-03T10:06:22Zoai: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:34982025-09-03 10:06:22.625CONICET 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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1842269955445227520 |
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13.13397 |