Artículo
Structure of compact stars in R-squared Palatini gravity
Teppa Pannia, Florencia Anabella
; García, Federico
; Perez Bergliaffa, Santiago Esteban; Orellana, Mariana Dominga
; Romero, Gustavo Esteban
Fecha de publicación:
02/2017
Editorial:
Springer/Plenum Publishers
Revista:
General Relativity And Gravitation
ISSN:
0001-7701
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
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.
Palabras clave:
Modified Gravity
,
Palatini Formalism
,
Neutron Stars
,
Equation of State
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos(IAR)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Citación
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
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