scholarly journals Poloidal magnetic fields in superconducting neutron stars

2013 ◽  
Vol 431 (4) ◽  
pp. 2986-3002 ◽  
Author(s):  
K. T. Henriksson ◽  
I. Wasserman
Keyword(s):  
Magnetic Fields ◽  
Neutron Stars ◽  
Poloidal Magnetic Fields

scholarly journals Deformation of neutron stars due to poloidal magnetic fields

2019 ◽  
Vol 2019 (8) ◽  
Author(s):  
K Yanase ◽  
N Yoshinaga ◽  
E Nakano ◽  
C Watanabe
Keyword(s):  
Magnetic Field ◽  
Neutron Star ◽  
Magnetic Fields ◽  
Neutron Stars ◽  
Strong Magnetic Field ◽  
Axially Symmetric ◽  
Poloidal Magnetic Field ◽  
The One ◽  
Poloidal Magnetic Fields

Abstract The mass–radius (MR) relation of deformed neutron stars in the axially symmetric poloidal magnetic field is calculated. The MR relation is obtained by solving the Hartle equations, whereas the one for spherical stars is obtained by the Tolman–Oppenheimer–Volkoff equations. The anisotropic effects of the poloidal magnetic fields are found to be non-negligible for a strong magnetic field more than $3\times10^{18}$ G at the center of a neutron star.

scholarly journals Axisymmetric equilibrium models for magnetised neutron stars in scalar-tensor theories

2020 ◽  
Vol 640 ◽  
pp. A44 ◽  
Author(s):  
J. Soldateschi ◽  
N. Bucciantini ◽  
L. Del Zanna
Keyword(s):  
General Relativity ◽  
Magnetic Fields ◽  
Neutron Stars ◽  
Scalar Fields ◽  
Flat Condition ◽  
General Relativistic ◽  
Axisymmetric Equilibrium ◽  
First Time ◽  
Poloidal Magnetic Fields ◽  
The Universe

Among the possible extensions of general relativity that have been put forward to address some long-standing issues in our understanding of the Universe, scalar-tensor theories have received a lot of attention for their simplicity. Interestingly, some of these predict a potentially observable non-linear phenomenon, known as spontaneous scalarisation, in the presence of highly compact matter distributions, as in the case of neutron stars. Neutron stars are ideal laboratories for investigating the properties of matter under extreme conditions and, in particular, they are known to harbour the strongest magnetic fields in the Universe. Here, for the first time, we present a detailed study of magnetised neutron stars in scalar-tensor theories. First, we showed that the formalism developed for the study of magnetised neutron stars in general relativity, based on the “extended conformally flat condition”, can easily be extended in the presence of a non-minimally coupled scalar field, retaining many of its numerical advantages. We then carried out a study of the parameter space considering the two extreme geometries of purely toroidal and purely poloidal magnetic fields, varying both the strength of the magnetic field and the intensity of scalarisation. We compared our results with magnetised general-relativistic solutions and un-magnetised scalarised solutions, showing how the mutual interplay between magnetic and scalar fields affect the magnetic and the scalarisation properties of neutron stars. In particular, we focus our discussion on magnetic deformability, maximum mass, and range of scalarisation.

Origin of Magnetic Fields in White Dwarfs and Neutron Stars

1971 ◽  
Vol 231 (19) ◽  
pp. 32-33 ◽  
Author(s):  
R. F. O'CONNELL ◽  
K. M. ROUSSEL
Keyword(s):  
Magnetic Fields ◽  
Neutron Stars ◽  
White Dwarfs

Effect of Superstrong Magnetic Fields on Nuclear Energy Generation Rate in the Crust of Neutron Stars

2008 ◽  
Vol 49 (4) ◽  
pp. 1069-1072 ◽  
Author(s):  
Liu Hong-Lin ◽  
Luo Zhi-Quan ◽  
Liu Jing-Jing ◽  
Lai Xiang-Jun
Keyword(s):  
Magnetic Fields ◽  
Neutron Stars ◽  
Nuclear Energy ◽  
Energy Generation ◽  
Generation Rate

Physics in Strong Magnetic Fields Near Neutron Stars

Science ◽  
1991 ◽  
Vol 251 (4997) ◽  
pp. 1033-1038 ◽  
Author(s):  
A. K. HARDING
Keyword(s):  
Magnetic Fields ◽  
Neutron Stars ◽  
Strong Magnetic Fields
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