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Title: INNER CRUSTS OF NEUTRON STARS IN STRONGLY QUANTIZING MAGNETIC FIELDS

Abstract

We study the ground-state properties of inner crusts of neutron stars in the presence of strong magnetic fields of {approx}10{sup 17} G. Nuclei coexist with a neutron gas and reside in a uniform gas of electrons in the inner crust. This problem is investigated within the Thomas-Fermi model. We extract the properties of nuclei based on the subtraction procedure of Bonche, Levit, and Vautherin. The phase space modification of electrons due to Landau quantization in the presence of strong magnetic fields leads to the enhancement of electron as well as proton fractions at lower densities of {approx}0.001 fm{sup -3}. We find the equilibrium nucleus at each average baryon density by minimizing the free energy and show that, in the presence of strong magnetic fields, it is lower than that in the field-free case. The size of the spherical cell that encloses a nucleus along with the neutron and electron gases becomes smaller in strong magnetic fields compared to the zero-field case. Nuclei with larger mass and atomic numbers are obtained in the presence of strong magnetic fields compared with cases of zero field.

Authors:
;  [1]; ;  [2]
  1. Astroparticle Physics and Cosmology Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064 (India)
  2. Frankfurt Institute for Advanced Studies (FIAS), J. W. Goethe Universitaet, Ruth Moufang Strasse 1, 60438 Frankfurt am Main (Germany)
Publication Date:
OSTI Identifier:
21578225
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 736; Journal Issue: 2; Other Information: DOI: 10.1088/0004-637X/736/2/156; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ELECTRONS; MAGNETIC FIELDS; MODIFICATIONS; NEUTRON STARS; PHASE SPACE; PROTONS; QUANTIZATION; THOMAS-FERMI MODEL; ATOMIC MODELS; BARYONS; ELEMENTARY PARTICLES; FERMIONS; HADRONS; LEPTONS; MATHEMATICAL MODELS; MATHEMATICAL SPACE; NUCLEONS; SPACE; STARS

Citation Formats

Nandi, Rana, Bandyopadhyay, Debades, Mishustin, Igor N., and Greiner, Walter. INNER CRUSTS OF NEUTRON STARS IN STRONGLY QUANTIZING MAGNETIC FIELDS. United States: N. p., 2011. Web. doi:10.1088/0004-637X/736/2/156.
Nandi, Rana, Bandyopadhyay, Debades, Mishustin, Igor N., & Greiner, Walter. INNER CRUSTS OF NEUTRON STARS IN STRONGLY QUANTIZING MAGNETIC FIELDS. United States. doi:10.1088/0004-637X/736/2/156.
Nandi, Rana, Bandyopadhyay, Debades, Mishustin, Igor N., and Greiner, Walter. Mon . "INNER CRUSTS OF NEUTRON STARS IN STRONGLY QUANTIZING MAGNETIC FIELDS". United States. doi:10.1088/0004-637X/736/2/156.
@article{osti_21578225,
title = {INNER CRUSTS OF NEUTRON STARS IN STRONGLY QUANTIZING MAGNETIC FIELDS},
author = {Nandi, Rana and Bandyopadhyay, Debades and Mishustin, Igor N. and Greiner, Walter},
abstractNote = {We study the ground-state properties of inner crusts of neutron stars in the presence of strong magnetic fields of {approx}10{sup 17} G. Nuclei coexist with a neutron gas and reside in a uniform gas of electrons in the inner crust. This problem is investigated within the Thomas-Fermi model. We extract the properties of nuclei based on the subtraction procedure of Bonche, Levit, and Vautherin. The phase space modification of electrons due to Landau quantization in the presence of strong magnetic fields leads to the enhancement of electron as well as proton fractions at lower densities of {approx}0.001 fm{sup -3}. We find the equilibrium nucleus at each average baryon density by minimizing the free energy and show that, in the presence of strong magnetic fields, it is lower than that in the field-free case. The size of the spherical cell that encloses a nucleus along with the neutron and electron gases becomes smaller in strong magnetic fields compared to the zero-field case. Nuclei with larger mass and atomic numbers are obtained in the presence of strong magnetic fields compared with cases of zero field.},
doi = {10.1088/0004-637X/736/2/156},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 736,
place = {United States},
year = {2011},
month = {8}
}