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
- Institución
- Universidad Nacional de Río Negro
- OAI Identificador
- oai:rid.unrn.edu.ar:20.500.12049/2830
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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 Negro2025-09-04T11:13:14Zoai: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:43692025-09-04 11:13:15.147RID-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/ |
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application/pdf |
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