Structure of compact stars in Palatini f (R) gravity
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 metri...
| Autores principales: | , , , , |
|---|---|
| Formato: | Objeto de conferencia |
| Lenguaje: | Inglés |
| Publicado: |
2014
|
| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/165283 |
| Aporte de: |
| id |
I19-R120-10915-165283 |
|---|---|
| record_format |
dspace |
| spelling |
I19-R120-10915-1652832024-04-24T20:07:36Z http://sedici.unlp.edu.ar/handle/10915/165283 Structure of compact stars in Palatini f (R) gravity García, Federico Teppa Pannia, Florencia Anabella Pérez Bergliaffa, Santiago Esteban Orellana, Mariana Dominga Romero, Gustavo Esteban 2014-04 2015 2024-04-24T18:09:51Z en Ciencias Astronómicas neutron stars Palatini formalism modified gravity 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 Objeto de conferencia Objeto de conferencia http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 207-210 |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Astronómicas neutron stars Palatini formalism modified gravity |
| spellingShingle |
Ciencias Astronómicas neutron stars Palatini formalism modified gravity García, Federico Teppa Pannia, Florencia Anabella Pérez Bergliaffa, Santiago Esteban Orellana, Mariana Dominga Romero, Gustavo Esteban Structure of compact stars in Palatini f (R) gravity |
| topic_facet |
Ciencias Astronómicas neutron stars Palatini formalism modified gravity |
| 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. |
| format |
Objeto de conferencia Objeto de conferencia |
| author |
García, Federico Teppa Pannia, Florencia Anabella Pérez Bergliaffa, Santiago Esteban Orellana, Mariana Dominga Romero, Gustavo Esteban |
| author_facet |
García, Federico Teppa Pannia, Florencia Anabella Pérez Bergliaffa, Santiago Esteban Orellana, Mariana Dominga Romero, Gustavo Esteban |
| author_sort |
García, Federico |
| title |
Structure of compact stars in Palatini f (R) 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 |
| publishDate |
2014 |
| url |
http://sedici.unlp.edu.ar/handle/10915/165283 |
| work_keys_str_mv |
AT garciafederico structureofcompactstarsinpalatinifrgravity AT teppapanniaflorenciaanabella structureofcompactstarsinpalatinifrgravity AT perezbergliaffasantiagoesteban structureofcompactstarsinpalatinifrgravity AT orellanamarianadominga structureofcompactstarsinpalatinifrgravity AT romerogustavoesteban structureofcompactstarsinpalatinifrgravity |
| _version_ |
1807223007726272512 |