Mass radius relation of compact stars in the braneworld

Journal Article · Fri Aug 01 04:00:00 EDT 2014 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2014/08/047· OSTI ID:22373381

Castro, Luis B.; Menezes, Débora P. ^[1]

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1. Depto de Física, CFM, Universidade Federal de Santa Catarina, Florianópolis, SC CP-476, CEP 88.040-900 (Brazil)

The braneworld scenario, based on the fact that the four dimension space-time is a hyper-surface of a five dimensional manifold, was shown to deal in a satisfactory way with the hierarchy problem. In this work we study macroscopic stellar properties of compact stars from the braneworld point of view. Using neutron star equations of state, we test the possibility of extra dimensions by solving the brane Tolman-Oppenheimer-Volkoff equations obtained for three kinds of possible compact objects: hadronic, hybrid and quark stars. By comparing the macroscopic solutions with observational constraints, we establish a brane tension lower limit and the value for which the Tolman-Oppenheimer-Volkoff equations in the braneworld converge to the usual Tolman-Oppenheimer-Volkoff equations.

• OSTI ID: 22373381
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 08 Vol. 2014; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BRANES
EQUATIONS OF STATE
M-THEORY
MATHEMATICAL SOLUTIONS
NEUTRON STARS
SPACE-TIME
SURFACES