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Title: Effects of neutrino emissivity on the cooling of neutron stars in the presence of a strong magnetic field

One of the most interesting kind of neutron stars are the pulsars, which are highly magnetized neutron stars with fields up to 10{sup 14} G at the surface. The strength of magnetic field in the center of a neutron star remains unknown. According to the scalar virial theorem, magnetic field in the core could be as large as 10{sup 18} G. In this work we study the influence of strong magnetic fields on the cooling of neutron stars coming from direct Urca process. Direct Urca process is an extremely efficient mechanism for cooling a neutron star after its formation. The matter is described using a relativistic mean-field model at zero temperature with eight baryons (baryon octet), electrons and muons. We obtain the relative population of each species of particles as function of baryon density for different magnetic fields. We calculate numerically the cooling of neutron stars for a parametrized magnetic field and compare the results for the case without a magnetic field.
Authors:
 [1] ;  [2] ;  [3]
  1. Universidade Veiga de Almeida, 108 Ibituruna St., 20271-020, Rio de Janeiro (Brazil)
  2. Instituto de Física, Universidade do Estado do Rio de Janeiro, 524 São Francisco Xavier St., 20271-020, Rio de Janeiro (Brazil)
  3. Instituto de Física, Universidade Federal Fluminense, Gal. Milton Tavares de Souza Ave., 24210-346, Rio de Janeiro (Brazil)
Publication Date:
OSTI Identifier:
22494317
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1693; Journal Issue: 1; Conference: 2. ICRANet Cesar Lattes meeting on supernovae, neutron stars and black holes, Rio de Janeiro (Brazil), 13-22 Apr 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BARYON OCTETS; BARYONS; COMPARATIVE EVALUATIONS; COOLING; DENSITY; ELECTRONS; EMISSIVITY; MAGNETIC FIELDS; MEAN-FIELD THEORY; MUONS; NEUTRINOS; NEUTRON STARS; PARTICLES; PULSARS; RELATIVISTIC RANGE; SCALARS; VIRIAL THEOREM