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Title: Non-perturbative and self-consistent models of neutron stars in R-squared gravity

In the present paper we investigate non-perturbatively and self-consistently the structure of neutron stars in R-squared gravity by simultaneously solving the interior and exterior problem. The mass-radius relations are obtained for several equations of state and for wide range of the R-squared gravity parameter a. Even though the deviation from general relativity for nonzero values of a can be large, they are still comparable with the variations due to different modern realistic equations of state. That is why the current observations of the neutron star masses and radii alone can not put constraints on the value of the parameter a. We also compare our results with those obtained within the perturbative method and we discuss the differences between them.
Authors:
; ;  [1] ;  [2]
  1. Theoretical Astrophysics, Eberhard-Karls University of Tübingen, Tübingen 72076 (Germany)
  2. Department of Theoretical Physics, Faculty of Physics, Sofia University, Sofia 1164 (Bulgaria)
Publication Date:
OSTI Identifier:
22373543
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 06; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; EQUATIONS OF STATE; GENERAL RELATIVITY THEORY; GRAVITATION; MASS; NEUTRON STARS