Structure of neutron stars in R-squared gravity

Fil: Orellana, Mariana D. Universidad Nacional de Río Negro; Argentina

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Detalles Bibliográficos
Autores principales:	Orellana, Mariana Dominga, García, Federico, Teppa Pannia, Florencia A., Romero, Gustavo E.
Lenguaje:	Inglés
Publicado:	Springer 2013
Materias:	Ciencias Físicas Modified Gravity Neutron Stars Generalised Gravity Equation
Acceso en línea:	http://link.springer.com/article/10.1007%2Fs10714-013-1501-5 http://arxiv.org/abs/1301.5189 https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2831 http://dx.doi.org/10.1007/s10714-013-1501-5
Aporte de:	Repositorio Institucional Digital de la Universidad Nacional de Río Negro (UNRN) de Universidad Nacional de Río Negro

id	I65-R171-20.500.12049-2831
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spelling	I65-R171-20.500.12049-28312023-09-13T15:35:41Z application/pdf info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/4.0/ 2013-06-22 Fil: Orellana, Mariana D. Universidad Nacional de Río Negro; Argentina Fil: Orellana, Mariana D. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina Fil: Orellana, Mariana D. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Fil: Orellana, Mariana D. Instituto Argentino de Radioastronomia; Argentina Fil: García, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata; Argentina Fil: García, Federico. Instituto Argentino de Radioastronomia; Argentina. Fil: García, Federico. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Teppa Pannia, Florencia A. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Romero, Gustavo E. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata; Argentina Fil: Romero, Gustavo E. Instituto Argentino de Radioastronomia; Argentina. Fil: Romero, Gustavo E. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Structure of neutron stars in R-squared gravity Orellana, Mariana Dominga García, Federico Teppa Pannia, Florencia A. Romero, Gustavo E. Ciencias Físicas Modified Gravity Neutron Stars Generalised Gravity Equation Ciencias Físicas true The effects implied for the structure of compact objects by the modification of General Relativity produced by the generalization of the Lagrangian density to the form R plus alpha R-squared, where R is the Ricci curvature scalar, have been recently explored. It seems likely that this squared-gravity may allow heavier Neutron Stars (NSs) than GR. In addition, these objects can be useful to constrain free parameters of modified-gravity theories. The differences between alternative gravity theories is enhanced in the strong gravitational regime. In this regime, because of the complexity of the field equations, perturbative methods become a good choice to treat the problem. Following previous works in the field, we performed a numerical integration of the structure equations that describe NSs in f(R)-gravity, recovering their mass-radius relations, but focusing on particular features that arise from this approach in the profiles of the NS interior.We show that these profiles run in correlation with the second-order derivative of the analytic approximation to the Equation of State (EoS), which leads to regions where the enclosed mass decreases with the radius in a counter-intuitive way. We reproduce all computations with a simple polytropic EoS to separate zeroth-order modified gravity effects. Orellana, Mariana D., García, Federico., Teppa Pannia, Florencia A. & Romero, Gustavo E. (2013). Structure of neutron stars in R-squared gravity. Springer; General Relativity And Gravitation; 45; 4; 771-783 0001-7701 http://link.springer.com/article/10.1007%2Fs10714-013-1501-5 http://arxiv.org/abs/1301.5189 https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2831 http://dx.doi.org/10.1007/s10714-013-1501-5 eng 45 General Relativity And Gravitation Springer
institution	Universidad Nacional de Río Negro
institution_str	I-65
repository_str	R-171
collection	Repositorio Institucional Digital de la Universidad Nacional de Río Negro (UNRN)
language	Inglés
orig_language_str_mv	eng
topic	Ciencias Físicas Modified Gravity Neutron Stars Generalised Gravity Equation Ciencias Físicas
spellingShingle	Ciencias Físicas Modified Gravity Neutron Stars Generalised Gravity Equation Ciencias Físicas Orellana, Mariana Dominga García, Federico Teppa Pannia, Florencia A. Romero, Gustavo E. Structure of neutron stars in R-squared gravity
topic_facet	Ciencias Físicas Modified Gravity Neutron Stars Generalised Gravity Equation Ciencias Físicas
description	Fil: Orellana, Mariana D. Universidad Nacional de Río Negro; Argentina
author	Orellana, Mariana Dominga García, Federico Teppa Pannia, Florencia A. Romero, Gustavo E.
author_facet	Orellana, Mariana Dominga García, Federico Teppa Pannia, Florencia A. Romero, Gustavo E.
author_sort	Orellana, Mariana Dominga
title	Structure of neutron stars in R-squared gravity
title_short	Structure of neutron stars in R-squared gravity
title_full	Structure of neutron stars in R-squared gravity
title_fullStr	Structure of neutron stars in R-squared gravity
title_full_unstemmed	Structure of neutron stars in R-squared gravity
title_sort	structure of neutron stars in r-squared gravity
publisher	Springer
publishDate	2013
url	http://link.springer.com/article/10.1007%2Fs10714-013-1501-5 http://arxiv.org/abs/1301.5189 https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2831 http://dx.doi.org/10.1007/s10714-013-1501-5
work_keys_str_mv	AT orellanamarianadominga structureofneutronstarsinrsquaredgravity AT garciafederico structureofneutronstarsinrsquaredgravity AT teppapanniaflorenciaa structureofneutronstarsinrsquaredgravity AT romerogustavoe structureofneutronstarsinrsquaredgravity
_version_	1824438265805012992

Structure of neutron stars in R-squared gravity

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