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We investigate the magneto--elastic equilibrium of a neutron star crust and magnetic energy stored by the elastic force. The solenoidal motion driven by the Lorentz force can be controlled by the magnetic elastic force, so that conditions…

高能天体物理现象 · 物理学 2022-01-19 Yasufumi Kojima , Shota Kisaka , Kotaro Fujisawa

We investigate new solutions for magnetized neutron stars with a barotropic core in magnetohydrodynamic (MHD) equilibrium and a magneto-elastic crust, which was neglected by previous studies concerning stars in MHD equilibrium. The Lorentz…

高能天体物理现象 · 物理学 2023-01-04 Kotaro Fujisawa , Yasufumi Kojima , Shota Kisaka

We examine the equilibrium of a magnetized neutron-star-crust. We calculate axially symmetric models in which an elastic force balances solenoidal motion driven by a Lorentz force. A large variety of equilibrium models are allowed by…

高能天体物理现象 · 物理学 2021-08-11 Yasufumi Kojima , Shota Kisaka , Kotaro Fujisawa

We study equilibrium magnetic field configurations in a neutron star (NS) whose core has type-II superconducting protons. Unlike the equations for normal matter, which feature no special field strength, those for superconductors contain the…

高能天体物理现象 · 物理学 2015-06-16 S. K. Lander

We study the impact of strong magnetic fields on the pasta phases that are expected to exist in the inner crust of neutron stars. We employ the relativistic mean field model to describe the nucleon interaction and use the self-consistent…

核理论 · 物理学 2021-01-14 S. S. Bao , J. N. Hu , H. Shen

In this work, we have studied oscillations in the crust of a neutron star which magnetic field has both dipolar and toroidal components, the former extends from the stellar interior to the outer space and the later is confined inside the…

广义相对论与量子宇宙学 · 物理学 2020-02-05 Gibran Henrique de Souza , Ernesto Kemp

We study the effect of strong magnetic fields, of the order of $10^{15}-10^{17}$ G, on the extension of the crust of magnetized neutron stars. The dynamical instability region of neutron-proton-electron ($npe$) matter at subsaturation…

核理论 · 物理学 2016-12-14 Jianjun Fang , Sidney Avancini , Helena Pais , Constança Providência

We obtained the magnetic field configurations, including both poloidal and toroidal components, throughout the interior and exterior of magnetars using a realistic equation of state. We divided the magnetized star into the hydromagnetic…

高能天体物理现象 · 物理学 2015-10-01 Kotaro Fujisawa , Shota Kisaka

Neutron stars can harbor extremely strong magnetic fields, yet the structure and stability of their magnetic field configuration remain poorly understood. Observations of pulsars indicate that the large-scale external field is predominantly…

高能天体物理现象 · 物理学 2026-05-25 Aurora Capobianco , William Cook , Sebastiano Bernuzzi , Brynmor Haskell , Jacob Fields

Neutron stars exhibit magnetic fields and densities far beyond those achievable in terrestrial laboratories, offering a natural probe of strongly interacting matter under extreme conditions. Using observationally anchored mass-radius…

宇宙学与河外天体物理 · 物理学 2026-01-13 Abriana Lyda , Prajwal MohanMurthy

Current models of magnetars require extremely strong magnetic fields to explain their observed quiescent and bursting emission, implying that the field strength within the star's outer crust is orders of magnitude larger than the dipole…

太阳与恒星天体物理 · 物理学 2016-04-07 Konstantinos N. Gourgouliatos , Toby Wood , Rainer Hollerbach

It has been shown recently that taking into account strong, weak, electromagnetic, and gravitational interactions, and fulfilling the global charge neutrality of the system, a transition layer will happen between the core and crust of…

太阳与恒星天体物理 · 物理学 2014-03-20 Jorge A. Rueda , Remo Ruffini , Yuan-Bin Wu , She-Sheng Xue

We develop an effective model for a neutron star with a magnetosphere. It takes into account the electromagnetic torques acting on the magnetic dipole, the friction forces between the crust and the core, and the gravitational corrections.…

天体物理学 · 物理学 2009-10-30 H. Casini , R. Montemayor

The Vlasov equation is used to determine the dispersion relation for the eigenmodes of magnetized nuclear and neutral stellar matter, taking into account the anomalous magnetic moment of nucleons. The formalism is applied to the…

高能天体物理现象 · 物理学 2017-04-26 Jianjun Fang , Helena Pais , Sagar Pratapsi , Sidney Avancini , Jing Li , Constança Providência

Understanding the properties of the internal magnetic field of neutron stars remains a theoretical challenge. Over the last years, twisted-torus geometries have been considered both in Newtonian and general-relativistic equilibrium models,…

太阳与恒星天体物理 · 物理学 2013-09-20 Riccardo Ciolfi , Luciano Rezzolla

Even though the crystallize nature of the neutron star crust plays a pivotal role in describing various fascinating astrophysical observations, its microscopic structure is not fully understood in the presence of a colossal magnetic field.…

高能天体物理现象 · 物理学 2023-02-23 Vishal Parmar , H. C. Das , M. K. Sharma , S. K. Patra

In this work we study the structure of neutron stars under the effect of a poloidal magnetic field and determine the limiting highest magnetic field intensity which still allows a satisfactory description of magnetic neutron stars in the…

核理论 · 物理学 2019-07-09 R. O. Gomes , Helena Pais , V. Dexheimer , Constança Providência , S. Schramm

We investigate the influence of different magnetic field configurations on the temperature distribution in neutron star crusts. We consider axisymmetric dipolar fields which are either restricted to the stellar crust, ``crustal fields'', or…

天体物理学 · 物理学 2009-11-10 U. Geppert , M. Kueker , D. Page

In this work we explore the evolution of magnetic fields inside strongly magnetized neutron stars in axisymmetry. We model numerically the coupled field evolution in the core and the crust. Our code models the Hall drift and Ohmic effects…

高能天体物理现象 · 物理学 2017-11-29 Ashley Bransgrove , Yuri Levin , Andrei Beloborodov

We study the role of the pasta phases on the properties of rotating and magnetized neutron stars. In order to investigate such systems, we make use of two different relativistic mean-field unified inner-crust--core equations of state, with…

核理论 · 物理学 2020-09-23 Ivo Sengo , Helena Pais , Bruno Franzon , Constança Providência
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