Neutron stars with antikaons: Comparison between two ways of extending the relativistic mean field models

Gupta, Neha; Arumugam, P.

doi:10.1103/physrevc.87.045802

Cited by 5 publications

(1 citation statement)

References 38 publications

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“…As the inclusion of this term allows us to tune the slope of the symmetry energy, shown to be strongly correlated with some star properties, it is an important ingredient in the investigation that follows. In a previous work [27] a discussion on the onset of kaons and antikaons controlled by stiff and soft symmetry energy and EoS was performed at zero temperature with four kinds of models: a standard relativistic mean-field one, a density dependent model, a model with the ω-ρ interaction, and a model with higher order coupling constants. It was found that, although the last two models bear quite different symmetry energies, they yield very similar star masses and radii.…”

Section: Introductionmentioning

confidence: 99%

Effects of the symmetry energy on the kaon condensates in the quark-meson coupling model

2014

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In this work we investigate protoneutron star properties within a modified version of the quark-meson coupling (QMC) model that incorporates an ω-ρ interaction plus kaon condensed matter at finite temperature. Fixed entropy and trapped neutrinos are taken into account. Our results are compared with the ones obtained with the GM1 parametrization of the nonlinear Walecka model for similar values of the symmetry energy slope. Contrary to GM1, within the QMC model the formation of low mass black holes during cooling are not probable. It is shown that the evolution of the protoneutron star may include the melting of the kaon condensate driven by the neutrino diffusion, followed by the formation of a second condensate after cooling. The signature of this complex process could be a neutrino signal followed by a gamma ray burst. We have seen that both models can, in general, describe very massive stars.

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Section: Introductionmentioning

confidence: 99%

Effects of the symmetry energy on the kaon condensates in the quark-meson coupling model

2014

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(Anti)kaon condensation in strongly magnetized dense matter

2023

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Massive neutron stars with antikaon condensates in a density-dependent hadron field theory

Char

Banik

2014

Phys. Rev. C

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The measurement of 1.97 ± 0.04M solar for PSR J1614-2230 and 2.01 ± 0.04M solar for PSR J0348+0432 puts a strong constraint on the neutron star equation of state and its exotic composition at higher densities. In this paper, we investigate the possibility of exotic equation of state within the observational mass constraint of 2M solar in the framework of relativistic mean field model with density-dependent couplings. We particularly study the effect of antikaon condensates in the presence of hyperons on the mass-radius relationship of the neutron star.

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Neutron stars with antikaons: Comparison between two ways of extending the relativistic mean field models

Cited by 5 publications

References 38 publications

Effects of the symmetry energy on the kaon condensates in the quark-meson coupling model

Effects of the symmetry energy on the kaon condensates in the quark-meson coupling model

(Anti)kaon condensation in strongly magnetized dense matter

Massive neutron stars with antikaon condensates in a density-dependent hadron field theory

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