Axisymmetric and stationary structures of magnetized barotropic stars with extremely strong magnetic fields deep inside

Kotaro Fujisawa, Shin'ichirou Yoshida, Yoshiharu Eriguchi

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

We have succeeded in obtaining magnetized star models that have extremely strong magnetic fields in the interior of the star. In our formulation, arbitrary functions of the magnetic flux function appear in the expression for the current density. By appropriately choosing the functional form for one of the arbitrary functions that corresponds to the distribution of the toroidal current density, we have obtained configurations with magnetic field distributions that are highly localized within the central part and near the magnetic axis region. The absolute values of the central magnetic fields are stronger than those of the surface region by two orders of magnitude. By applying our results to magnetars, the internal magnetic poloidal fields could be 10 17G, although the surface magnetic fields are about 10 15G in the case of magnetars. For white dwarfs, the internal magnetic poloidal fields could be 10 12G, when the surface magnetic fields are 10 9-10 10G.

Original languageEnglish
Pages (from-to)434-448
Number of pages15
JournalMonthly Notices of the Royal Astronomical Society
Volume422
Issue number1
DOIs
Publication statusPublished - 2012 May
Externally publishedYes

Fingerprint

magnetic field
stars
magnetars
magnetic fields
current density
magnetic flux
density current
formulations
configurations
distribution

Keywords

  • Stars: magnetic fields
  • Stars: neutron
  • White dwarfs

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Axisymmetric and stationary structures of magnetized barotropic stars with extremely strong magnetic fields deep inside. / Fujisawa, Kotaro; Yoshida, Shin'ichirou; Eriguchi, Yoshiharu.

In: Monthly Notices of the Royal Astronomical Society, Vol. 422, No. 1, 05.2012, p. 434-448.

Research output: Contribution to journalArticle

@article{194f7a1ded6a4e42a825b81599ac9d15,
title = "Axisymmetric and stationary structures of magnetized barotropic stars with extremely strong magnetic fields deep inside",
abstract = "We have succeeded in obtaining magnetized star models that have extremely strong magnetic fields in the interior of the star. In our formulation, arbitrary functions of the magnetic flux function appear in the expression for the current density. By appropriately choosing the functional form for one of the arbitrary functions that corresponds to the distribution of the toroidal current density, we have obtained configurations with magnetic field distributions that are highly localized within the central part and near the magnetic axis region. The absolute values of the central magnetic fields are stronger than those of the surface region by two orders of magnitude. By applying our results to magnetars, the internal magnetic poloidal fields could be 10 17G, although the surface magnetic fields are about 10 15G in the case of magnetars. For white dwarfs, the internal magnetic poloidal fields could be 10 12G, when the surface magnetic fields are 10 9-10 10G.",
keywords = "Stars: magnetic fields, Stars: neutron, White dwarfs",
author = "Kotaro Fujisawa and Shin'ichirou Yoshida and Yoshiharu Eriguchi",
year = "2012",
month = "5",
doi = "10.1111/j.1365-2966.2012.20614.x",
language = "English",
volume = "422",
pages = "434--448",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "1",

}

TY - JOUR

T1 - Axisymmetric and stationary structures of magnetized barotropic stars with extremely strong magnetic fields deep inside

AU - Fujisawa, Kotaro

AU - Yoshida, Shin'ichirou

AU - Eriguchi, Yoshiharu

PY - 2012/5

Y1 - 2012/5

N2 - We have succeeded in obtaining magnetized star models that have extremely strong magnetic fields in the interior of the star. In our formulation, arbitrary functions of the magnetic flux function appear in the expression for the current density. By appropriately choosing the functional form for one of the arbitrary functions that corresponds to the distribution of the toroidal current density, we have obtained configurations with magnetic field distributions that are highly localized within the central part and near the magnetic axis region. The absolute values of the central magnetic fields are stronger than those of the surface region by two orders of magnitude. By applying our results to magnetars, the internal magnetic poloidal fields could be 10 17G, although the surface magnetic fields are about 10 15G in the case of magnetars. For white dwarfs, the internal magnetic poloidal fields could be 10 12G, when the surface magnetic fields are 10 9-10 10G.

AB - We have succeeded in obtaining magnetized star models that have extremely strong magnetic fields in the interior of the star. In our formulation, arbitrary functions of the magnetic flux function appear in the expression for the current density. By appropriately choosing the functional form for one of the arbitrary functions that corresponds to the distribution of the toroidal current density, we have obtained configurations with magnetic field distributions that are highly localized within the central part and near the magnetic axis region. The absolute values of the central magnetic fields are stronger than those of the surface region by two orders of magnitude. By applying our results to magnetars, the internal magnetic poloidal fields could be 10 17G, although the surface magnetic fields are about 10 15G in the case of magnetars. For white dwarfs, the internal magnetic poloidal fields could be 10 12G, when the surface magnetic fields are 10 9-10 10G.

KW - Stars: magnetic fields

KW - Stars: neutron

KW - White dwarfs

UR - http://www.scopus.com/inward/record.url?scp=84859877870&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84859877870&partnerID=8YFLogxK

U2 - 10.1111/j.1365-2966.2012.20614.x

DO - 10.1111/j.1365-2966.2012.20614.x

M3 - Article

VL - 422

SP - 434

EP - 448

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 1

ER -