Structure of compact stars in Palatini f (R) gravity

Autores
García, Federico; Teppa Pannia, Florencia Anabella; Pérez Bergliaffa, Santiago Esteban; Orellana, Mariana Dominga; Romero, Gustavo Esteban
Año de publicación
2014
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The study of the structure of compact objects in modified theories of gravity can be useful to constrain f (R)-theories in the strong gravitational regime. In particular, the structure of compact stars in the theory with Langrangian density f (R) = R + αR2 have been recently explored using the metric formalism. In this work we analyze configurations of neutron stars in squared-gravity using the Palatini formalism, in which the field equations are of second order, and the modified Tolman-Oppenheimer-Volkoff equations for a sphericallysymmetric and static metric can be derived without approximation, as in General Relativity. The numerical integration of the structure equations allows us to study the mass-radius configurations and the characteristics of internal profiles. We compare our results with those obtained using General Relativity.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
neutron stars
Palatini formalism
modified gravity
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/165283
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/165283
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Structure of compact stars in Palatini f (R) gravityGarcía, FedericoTeppa Pannia, Florencia AnabellaPérez Bergliaffa, Santiago EstebanOrellana, Mariana DomingaRomero, Gustavo EstebanCiencias Astronómicasneutron starsPalatini formalismmodified gravityThe study of the structure of compact objects in modified theories of gravity can be useful to constrain f (R)-theories in the strong gravitational regime. In particular, the structure of compact stars in the theory with Langrangian density f (R) = R + αR2 have been recently explored using the metric formalism. In this work we analyze configurations of neutron stars in squared-gravity using the Palatini formalism, in which the field equations are of second order, and the modified Tolman-Oppenheimer-Volkoff equations for a sphericallysymmetric and static metric can be derived without approximation, as in General Relativity. The numerical integration of the structure equations allows us to study the mass-radius configurations and the characteristics of internal profiles. We compare our results with those obtained using General Relativity.Facultad de Ciencias Astronómicas y Geofísicas2014-04info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionObjeto de conferenciahttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdf207-210http://sedici.unlp.edu.ar/handle/10915/165283enginfo:eu-repo/semantics/altIdentifier/isbn/978-987-24948-2-7info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T11:15:44Zoai:sedici.unlp.edu.ar:10915/165283Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 11:15:45.173SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Structure of compact stars in Palatini f (R) gravity
title Structure of compact stars in Palatini f (R) gravity
spellingShingle Structure of compact stars in Palatini f (R) gravity
García, Federico
Ciencias Astronómicas
neutron stars
Palatini formalism
modified gravity
title_short Structure of compact stars in Palatini f (R) gravity
title_full Structure of compact stars in Palatini f (R) gravity
title_fullStr Structure of compact stars in Palatini f (R) gravity
title_full_unstemmed Structure of compact stars in Palatini f (R) gravity
title_sort Structure of compact stars in Palatini f (R) gravity
dc.creator.none.fl_str_mv García, Federico
Teppa Pannia, Florencia Anabella
Pérez Bergliaffa, Santiago Esteban
Orellana, Mariana Dominga
Romero, Gustavo Esteban
author García, Federico
author_facet García, Federico
Teppa Pannia, Florencia Anabella
Pérez Bergliaffa, Santiago Esteban
Orellana, Mariana Dominga
Romero, Gustavo Esteban
author_role author
author2 Teppa Pannia, Florencia Anabella
Pérez Bergliaffa, Santiago Esteban
Orellana, Mariana Dominga
Romero, Gustavo Esteban
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
neutron stars
Palatini formalism
modified gravity
topic Ciencias Astronómicas
neutron stars
Palatini formalism
modified gravity
dc.description.none.fl_txt_mv The study of the structure of compact objects in modified theories of gravity can be useful to constrain f (R)-theories in the strong gravitational regime. In particular, the structure of compact stars in the theory with Langrangian density f (R) = R + αR2 have been recently explored using the metric formalism. In this work we analyze configurations of neutron stars in squared-gravity using the Palatini formalism, in which the field equations are of second order, and the modified Tolman-Oppenheimer-Volkoff equations for a sphericallysymmetric and static metric can be derived without approximation, as in General Relativity. The numerical integration of the structure equations allows us to study the mass-radius configurations and the characteristics of internal profiles. We compare our results with those obtained using General Relativity.
Facultad de Ciencias Astronómicas y Geofísicas
description The study of the structure of compact objects in modified theories of gravity can be useful to constrain f (R)-theories in the strong gravitational regime. In particular, the structure of compact stars in the theory with Langrangian density f (R) = R + αR2 have been recently explored using the metric formalism. In this work we analyze configurations of neutron stars in squared-gravity using the Palatini formalism, in which the field equations are of second order, and the modified Tolman-Oppenheimer-Volkoff equations for a sphericallysymmetric and static metric can be derived without approximation, as in General Relativity. The numerical integration of the structure equations allows us to study the mass-radius configurations and the characteristics of internal profiles. We compare our results with those obtained using General Relativity.
publishDate 2014
dc.date.none.fl_str_mv 2014-04
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
info:eu-repo/semantics/publishedVersion
Objeto de conferencia
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
format conferenceObject
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/165283
url http://sedici.unlp.edu.ar/handle/10915/165283
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/isbn/978-987-24948-2-7
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
207-210
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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