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Strong (B >> 10^9 G) and superstrong (B > 10^{14} G) magnetic fields profoundly affect many thermodynamic and kinetic characteristics of dense plasmas in neutron star envelopes. In particular, they produce strongly anisotropic thermal…

Astrophysics · Physics 2008-11-26 A. Y. Potekhin , G. Chabrier , D. G. Yakovlev

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…

Cosmology and Nongalactic Astrophysics · Physics 2026-01-13 Abriana Lyda , Prajwal MohanMurthy

We study the effects of high magnetic fields on the structure and on the geometry of the crust in neutron stars. We find that the crust geometry is substantially modified by the magnetic field inside the star. We build stationary and…

High Energy Astrophysical Phenomena · Physics 2017-12-18 B. Franzon , R. Negreiros , S. Schramm

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…

General Relativity and Quantum Cosmology · Physics 2020-02-05 Gibran Henrique de Souza , Ernesto Kemp

We show the existence of a strong trend between neutron star surface temperature and the dipolar component of the magnetic field extending through three orders of field magnitude, a range that includes magnetars, radio-quiet isolated…

Astrophysics · Physics 2008-11-26 J. A. Pons , B. Link , J. A. Miralles , U. Geppert

In the last few years considerable observational resources have been devoted to study the thermal emission from isolated neutron stars. Detailed XMM and Chandra observations revealed a number of features in the X-ray pulse profile, like…

Astrophysics · Physics 2009-11-10 Silvia Zane , Roberto Turolla

Neutron stars harbour extremely strong magnetic fields within their solid outer crust. The topology of this field strongly influences the surface temperature distribution, and hence the star's observational properties. In this work, we…

High Energy Astrophysical Phenomena · Physics 2020-11-04 Davide De Grandis , Roberto Turolla , Toby S. Wood , Silvia Zane , Roberto Taverna , Konstantinos N. Gourgouliatos

Central compact objects are young neutron stars emitting thermal X-rays with bolometric luminosities $L_X$ in the range $10^{32}$-$10^{34}$ erg/s. Gourgouliatos, Hollerbach and Igoshev recently suggested that peculiar emission properties of…

High Energy Astrophysical Phenomena · Physics 2021-03-17 Andrei P. Igoshev , Konstantinos N. Gourgouliatos , Rainer Hollerbach , Toby S. Wood

We present two-dimensional simulations for the cooling of neutron stars with strong magnetic fields (B > 1e13 Gauss). We study how the cooling curves are influenced by magnetic field decay. We show that the Joule heating effects are very…

Astrophysics · Physics 2008-03-05 Deborah N. Aguilera , José A. Pons , Juan A. Miralles

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…

Solar and Stellar Astrophysics · Physics 2016-04-07 Konstantinos N. Gourgouliatos , Toby Wood , Rainer Hollerbach

Off-centred dipole configurations have been suggested to explain different phenomena in neutron stars, such as natal kicks, irregularities in polarisation of radio pulsars and properties of X-ray emission from millisecond pulsars. Here for…

High Energy Astrophysical Phenomena · Physics 2023-08-21 Andrei P. Igoshev , Rainer Hollerbach , Toby Wood

The thermal emission from isolated neutron stars is not well understood. The X-ray spectrum is very close to a blackbody but there is a systematic optical excess flux with respect to the extrapolation to low energy of the best blackbody…

Astrophysics · Physics 2009-11-13 J. F. Perez-Azorin , J. A. Miralles , J. A. Pons

Neutron stars host the strongest magnetic fields that we know of in the Universe. Their magnetic fields are the main means of generating their radiation, either magnetospheric or through the crust. Moreover, the evolution of the magnetic…

High Energy Astrophysical Phenomena · Physics 2022-01-24 Konstantinos N. Gourgouliatos , Davide De Grandis , Andrei Igoshev

We present 2D simulations of the cooling of neutron stars with strong magnetic fields (B \geq 10^{13} G). We solve the diffusion equation in axial symmetry including the state of the art microphysics that controls the cooling such as…

Astrophysics · Physics 2007-10-26 Deborah N. Aguilera , Jose A. Pons , Juan A. Miralles

Isolated neutron stars (NSs) show a bewildering variety of astrophysical manifestations, presumably shaped by the magnetic field strength and topology at birth. Here, using state-of-the art calculations of the coupled magnetic and thermal…

High Energy Astrophysical Phenomena · Physics 2015-06-16 Rosalba Perna , Daniele Vigano' , Jose' A. Pons , Nanda Rea

We investigate the effects of a magnetic field on the thermodynamics of a neutron system at finite density and temperature. Our main motivation is to deepen the understanding of the physics of a class of neutron stars known as magnetars,…

Nuclear Theory · Physics 2019-06-12 E. J. Ferrer , A. Hackebill

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…

Nuclear Theory · Physics 2021-01-14 S. S. Bao , J. N. Hu , H. Shen

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…

Nuclear Theory · Physics 2016-12-14 Jianjun Fang , Sidney Avancini , Helena Pais , Constança Providência

We study the effect of physics input on thermal evolution of neutron stars in soft X-ray transients (SXTs). In particular, we consider different modern models of the sources of deep crustal heating during accretion episodes and the effects…

High Energy Astrophysical Phenomena · Physics 2021-01-27 A. Y. Potekhin , G. Chabrier

Neutron stars cool down during their lifetime through the combination of neutrino emission from the interior and photon cooling from the surface. Strongly magnetised neutron stars, called magnetars, are no exception, but the effect of their…

High Energy Astrophysical Phenomena · Physics 2023-01-18 Clara Dehman , José A. Pons , Daniele Viganò , Nanda Rea