2017/09/04 by R. O. Gomes, B. Franzon, V. Dexheimer +2 · 30 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics #Classical mechanics #Cold Atom Physics and Bose-Einstein Condensates #Equation of state #Gravitation #High-pressure geophysics and materials #Magnetic field #Neutron star #Nuclear matter #Nuclear physics #Nucleon #Physics #Pulsars and Gravitational Waves Research #Quantum electrodynamics #Quantum mechanics #Stars #nucl-th
paper · pdf · doi:10.3847/1538-4357/aa8b68
published in The Astrophysical Journal 850(1), 20 (IOP Publishing) · accepted by The Astrophysical Journal
arxiv created 2017/09/04 · openalex publication_date 2017/11/13 · arxiv updated 2017/11/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract In this work, we study in detail the effects of many-body forces on the equation of state and the structure of magnetic neutron stars. The stellar matter is described within a relativistic mean field formalism that takes into account many-body forces by means of a nonlinear meson field dependence on the nuclear interaction coupling constants. We assume that matter is at zero temperature, charge neutral, in beta equilibrium, and populated by the baryon octet, electrons, and muons. In order to study the effects of different degrees of stiffness in the equation of state, we explore the parameter space of the model, which reproduces nuclear matter properties at saturation, as well as massive neutron stars. Magnetic field effects are introduced both in the equation of state and in the macroscopic structure of stars by the self-consistent solution of the Einstein–Maxwell equations. In addition, the effects of poloidal magnetic fields on the global properties of stars, as well as density and magnetic field profiles, are investigated. We find that not only different macroscopic magnetic field distributions but also different parameterizations of the model for a fixed magnetic field distribution impact the gravitational mass, deformation, and internal density profiles of stars. Finally, we show that strong magnetic fields significantly affect the particle populations of stars.