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

Char, Prasanta; Banik, Sarmistha

doi:10.1103/physrevc.90.015801

Cited by 42 publications

(46 citation statements)

References 43 publications

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“…These EoS are generated within the framework of DD2 model. 23 Presence of hyperon makes the EoS softer compared to nucleons-only case. For npΛ EoS Λ appears at 2.20n 0 , for npΛΣΞ EoS Σ − and Ξ 0 appear at 2.48n 0 and 6.26n 0 respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Here in this paper, we consider different compositions in our EoS which is generated under the framework of density dependent relativistic mean field model 23,24 and study the variation of mass-radius profile for different EoS and how they evolve with uniform rotation of the neutron stars. We also study the maximum mass sustainable for rotating configuration, expressed in terms of dimensionless and normalised angular momenta.…”

Section: 16mentioning

confidence: 99%

“…23 The repulsive interaction among the hyperons are also considered within the model, it is mediated by the exchange of φ(1020) mesons. The couplings of antikaon-nucleon interactions are obtained similarly, however, they are not density-dependent.…”

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confidence: 99%

“…The particular choice of hyperon-nucleon potential does not affect the maximum mass of neutron stars, 37 but it varies with optical potential of (anti)kaons in nuclear matter. 23 Recently there have been studies of hypernuclear matter in neutron stars which meet the 2M solar mass limit. 38,39 The ref 39 gauges the parameters of the density-dependent functional with hypernuclei.…”

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confidence: 99%

“…23 In this model baryon-baryon interactions are mediated by σ, ω and ρ mesons. The salient feature of this model is the appearance of rearrangement term due to density dependent meson-baryon couplings which takes care of many body effects and the thermodynamic consistency 29 in dense neutron star matter.…”

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confidence: 99%

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Critical mass, moment of inertia and universal relations of rapidly rotating neutron stars with exotic matter

Lenka

Char

Banik

2017

Int. J. Mod. Phys. D

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We calculate moment of inertia of neutron star with different exotic constituents such as hyperons and (anti)kaon condensates and study its variation with mass and spin frequency. The sets of equation of state, generated within the framework of relativistic mean field model with density-dependent couplings are adopted for the purpose. We follow the quasi-stationary evolution of rotating stars along the constant rest mass sequences, that varies considerably with different constituents in the equation of state. We also explore the universal relations associated with some of the normalised properties, such as critical mass and moment of inertia for specific EoS or as a matter of fact constituents of the dense matter. Deviations in the universal relations for moment of inertia are observed at higher compactness. This study presents important results concerning the properties of neutron stars, that could be observationally verified in the near future using Square Kilometer Array telescope.

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Section: Resultsmentioning

confidence: 99%

Section: 16mentioning

confidence: 99%

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confidence: 99%