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We performed an observational study of the relation between the interstellar magnetic field alignment and star formation in twenty (20) sky regions containing Bok Globules. The presence of young stellar objects in the globules is verified…

Solar and Stellar Astrophysics · Physics 2015-06-17 C. V. Rodrigues , V. de S. Magalhaes , J. W. Vilas-Boas , G. Racca , A. Pereyra

A recipe is presented to construct an analytic, self-consistent model of a non-barotropic neutron star with a poloidal-toroidal field of arbitrary multipole order, whose toroidal component is confined in a torus around the neutral curve…

High Energy Astrophysical Phenomena · Physics 2015-01-26 Alpha Mastrano , Arthur George Suvorov , Andrew Melatos

As another step towards understanding the long-term evolution of the magnetic field in neutron stars, we provide the first simulations of ambipolar diffusion in a spherical star. Restricting ourselves to axial symmetry, we consider a…

High Energy Astrophysical Phenomena · Physics 2017-07-17 F. Castillo , A. Reisenegger , J. A. Valdivia

We explore the thermal and magnetic-field structure of a late-stage proto-neutron star. We find the dominant contribution to the entropy in different regions of the star, from which we build a simplified equation of state for the hot…

High Energy Astrophysical Phenomena · Physics 2021-02-24 S. K. Lander , P. Haensel , B. Haskell , J. L. Zdunik , M. Fortin

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

Differential rotation induced by the r-mode instability can generate very strong toroidal fields in the core of accreting, millisecond spinning neutron stars. We introduce explicitly the magnetic damping term in the evolution equations of…

High Energy Astrophysical Phenomena · Physics 2015-06-04 Carmine Cuofano , Simone Dall'Osso , Alessandro Drago , Luigi Stella

The effect of strong magnetic fields on the equation of state (EoS) for compact stars described with density-dependent relativistic hadronic models is studied. A comparison with other mean-field relativistic models is done. It is shown that…

Nuclear Theory · Physics 2008-10-27 A. Rabhi , C. Providencia , J. Da Providencia

We investigate the chiral magnetic instability in the crust of a neutron star as a potential mechanism for amplifying magnetic fields. This instability may become active when small deviations from chemical equilibrium are sustained over…

High Energy Astrophysical Phenomena · Physics 2024-08-13 Clara Dehman , José A. Pons

It is well-known that the 5D equations without sources may be reduced to the 4D ones with sources, provided an appropriate definition for the energy-momentum tensor of matter in terms of the extra part of the geometry.The advantage consists…

General Relativity and Quantum Cosmology · Physics 2011-04-15 Maria C. Neacsu

We study the effect of a strong magnetic field on the proton and neutron spin polarization and magnetic susceptibility of asymmetric nuclear matter within a relativistic mean-field approach. It is shown that magnetic fields $B \sim 10^{16}…

Nuclear Theory · Physics 2015-06-23 A. Rabhi , M. A. Pérez-García , C. Providência , I. Vidaña

We investigate the effect of a strong magnetic field on the structure of neutron stars in a model with perturbative $f(R)$ gravity. The effect of an interior strong magnetic field of about $10^{17 \sim 18}$ G on the equation of state is…

High Energy Astrophysical Phenomena · Physics 2015-06-15 Myung-Ki Cheoun , Cemsinan Deliduman , Can Güngör , Vildan Keleş , C. Y. Ryu , Toshitaka Kajino , Grant J. Mathews

The iterative method recently proposed for determining the internal constitution of the outer crust of a nonaccreted neutron star is extended to magnetars by taking into account the Landau-Rabi quantization of electron motion induced by the…

High Energy Astrophysical Phenomena · Physics 2020-07-01 Nicolas Chamel , Zhivko Krastev Stoyanov

Magnetic fields play a critical role in the phenomenology of neutron stars. There is virtually no observable aspect which is not governed by them. Despite this, only recently efforts have been done to model magnetic fields in the correct…

High Energy Astrophysical Phenomena · Physics 2015-06-23 N. Bucciantini , A. G. Pili , L. Del Zanna

There are X-ray pulsating sources that are explained by accretion from disks around neutron stars. Such disks deserve a detailed analysis. In particular, the dipole magnetic field of the central star may penetrate the disk, giving rise to…

High Energy Astrophysical Phenomena · Physics 2023-11-20 A. V. Kuzin

The strong magnetic field of neutron stars is intimately coupled to the observed temperature and spectral properties, as well as to the observed timing properties (distribution of spin periods and period derivatives). Thus, a proper…

High Energy Astrophysical Phenomena · Physics 2019-12-23 José A. Pons , Daniele Viganò

In the post-Newtonian era, the Eddington-inspired Born-Infeld (EiBI) theory, considered as an improved modification of the Einsteinian general relativity formalism in the weak field regime (non-relativistic), has enabled us to study the…

General Relativity and Quantum Cosmology · Physics 2024-12-04 Souvik Das , Pralay Kumar Karmakar

Observations indicate that the magnetic fields on neutron stars (NSs) lie in the range of $10^{8}$-$10^{15}$ G. We investigate rotating NSs with chaotic magnetic fields in both general relativity (GR) and Rastall gravity (RG). The equation…

High Energy Astrophysical Phenomena · Physics 2025-10-22 M. Lawrence Pattersons , Freddy P. Zen , Hadyan L. Prihadi , Muhammad F. A. R. Sakti , Getbogi Hikmawan

We have solved numerically the general relativistic induction equations in the interior background spacetime of a slowly rotating magnetized neutron star. The analytic form of these equations was discussed in a recent paper (Rezzolla et al…

Astrophysics · Physics 2009-11-07 O. Zanotti , L. Rezzolla

In this thesis, the effects of the magnetic field on neutron stars matter are studied, assuming that the neutrons inside these stars are partially or totally paired forming neutral vector bosons. The main effects of the magnetic field on…

High Energy Astrophysical Phenomena · Physics 2019-10-11 Gretel Quintero Angulo

Magnetorotational instability (MRI) has been suggested to lead a rapid growth of the magnetic field in core collapse supernovae and produce departures from spherical syymmetry that can be important in determining the explosion mechanism. We…

Solar and Stellar Astrophysics · Physics 2015-05-14 V. Urpin
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