Scalarization of compact stars in the scalar-Gauss-Bonnet gravity
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep12(2019)064
Abstract: Abstract We study scalarization of horizonless neutral compact reflecting stars. In our model, the scalar hair can be induced by the coupling of static scalar fields to the Gauss-Bonnet invariant. We analytically obtain lower bounds… read more here.
Keywords: scalarization compact; scalarization; compact stars; gauss bonnet ... See more keywords
Structure of compact stars in R-squared Palatini gravity
Sign Up to like & getrecommendations! Published in 2017 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-016-2182-7
Abstract: We analyse configurations of neutron stars in the so-called R-squared gravity in the Palatini formalism. Using a realistic equation of state we show that the mass–radius configurations are lighter than their counterparts in General Relativity.… read more here.
Keywords: compact stars; mass; equation state; general relativity ... See more keywords
Rapidly rotating compact stars in Rastall’s gravity
Sign Up to like & getrecommendations! Published in 2021 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ac129d
Abstract: In this work we study rapidly rotating stars by considering the Rastall theory of gravity. We obtain and solve the equations by numerical methods for two usual parametrization of polytropic stars. Then the mass–radius relations,… read more here.
Keywords: stars rastall; rotating compact; compact stars; gravity rapidly ... See more keywords
Gravitational wave observatories may be able to detect hyperbolic encounters of Black Holes
Sign Up to like & getrecommendations! Published in 2021 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stab2721
Abstract: Gravitational Wave (GW) astronomy promises to observe different kinds of astrophysical sources. Here we explore the possibility of detection of GWs from hyperbolic interactions of compact stars with ground-based interferometric detectors. It is believed that… read more here.
Keywords: black holes; gravitational wave; compact stars; observatories may ... See more keywords
Cooling of hypernuclear compact stars
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx3318
Abstract: We study the thermal evolution of hypernuclear compact stars constructed from covariant density functional theory of hypernuclear matter and parameterizations which produce sequences of stars containing two-solar-mass objects. For the input in the simulations, we… read more here.
Keywords: lambda; hypernuclear compact; compact stars; mass ... See more keywords
Cooling of hypernuclear compact stars: Hartree–Fock models and high-density pairing
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz1459
Abstract: The thermal evolution of hypernuclear compact stars is studied for stellar models constructed on the basis of covariant density functional theory in Hartree and Hartree–Fock approximation. Parametrizations of both types are consistent with the astrophysical… read more here.
Keywords: hypernuclear compact; high density; compact stars; density ... See more keywords
Relativistic hypernuclear compact stars with calibrated equations of state
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.101.034017
Abstract: Within the covariant density functional theory of hypernuclear matter we build a series of equations of state for hypernuclear compact stars, by calibrating the coupling constants of the $\Xi$-hyperon to the experimental binding energy of… read more here.
Keywords: equations state; relativistic hypernuclear; calibrated equations; compact stars ... See more keywords
Phase diagram and compact stars in a holographic QCD model
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.102.066006
Abstract: A holographic model is used to investigate the thermodynamics and the phase diagram of a heavy quarks system. From such a model we obtain an equation of state and explore its applicability in astrophysical conditions.… read more here.
Keywords: model; compact stars; phase diagram; equation state ... See more keywords
Equilibriums of extremely magnetized compact stars with force-free magnetotunnels
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review D"
DOI: 10.1103/physrevd.107.103016
Abstract: We present numerical solutions for stationary and axisymmetric equilibriums of compact stars associated with extremely strong magnetic fields. The interior of the compact stars is assumed to satisfy ideal magnetohydrodynamic (MHD) conditions, while in the… read more here.
Keywords: equilibriums extremely; magnetized compact; extremely magnetized; force free ... See more keywords
Two first-order phase transitions in hybrid compact stars: Higher-order multiplet stars, reaction modes, and intermediate conversion speeds
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review D"
DOI: 10.1103/physrevd.107.103042
Abstract: We study compact stars with hybrid equations of state consisting of a nuclear outer region and two nested quark phases, each separated from the lower density phase by a strong first-order phase transition. The stability… read more here.
Keywords: conversion; phase transitions; phase; first order ... See more keywords
Quintessence compact stars satisfying Karmarkar condition
Sign Up to like & getrecommendations! Published in 2019 at "Canadian Journal of Physics"
DOI: 10.1139/cjp-2018-0132
Abstract: In this research article, the authors have presented the modelling of quintessence compact stars, which satisfies the Karmarkar conditions. For this purpose, we have formulated the set of Einstein field equations with the static metric,… read more here.
Keywords: karmarkar condition; quintessence; stars satisfying; compact stars ... See more keywords