The effect of an inclined magnetic field on solar oscillation frequencies

Philip R. Goode; Michael J. Thompson

doi:10.1086/171653

The effect of an inclined magnetic field on solar oscillation frequencies

Philip R. Goode, Michael J. Thompson

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

The radiative interior of the Sun could be hiding a large-scale magnetic field, which might not be axisymmetric about the observed rotation axis. Using helioseismic data, we estimate that the strength of any such relic field must be less than about 30 MG, if the field is axisymmetric about the rotation axis. The shape oblateness caused by a field at this limiting strength is about 5-10 × 10^-6. Stronger fields can be accommodated by the helioseismic data if they are inclined to the rotation axis. We further conclude that the convection zone and at least the outer part of the radiative interior rotate on the same axis.

Original language	English (US)
Pages (from-to)	307-315
Number of pages	9
Journal	Astrophysical Journal
Volume	395
Issue number	1
DOIs	https://doi.org/10.1086/171653
State	Published - Aug 10 1992

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Sun: interior
Sun: magnetic fields
Sun: oscillations

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10.1086/171653

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abstract = "The radiative interior of the Sun could be hiding a large-scale magnetic field, which might not be axisymmetric about the observed rotation axis. Using helioseismic data, we estimate that the strength of any such relic field must be less than about 30 MG, if the field is axisymmetric about the rotation axis. The shape oblateness caused by a field at this limiting strength is about 5-10 × 10-6. Stronger fields can be accommodated by the helioseismic data if they are inclined to the rotation axis. We further conclude that the convection zone and at least the outer part of the radiative interior rotate on the same axis.",

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AU - Goode, Philip R.

AU - Thompson, Michael J.

PY - 1992/8/10

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N2 - The radiative interior of the Sun could be hiding a large-scale magnetic field, which might not be axisymmetric about the observed rotation axis. Using helioseismic data, we estimate that the strength of any such relic field must be less than about 30 MG, if the field is axisymmetric about the rotation axis. The shape oblateness caused by a field at this limiting strength is about 5-10 × 10-6. Stronger fields can be accommodated by the helioseismic data if they are inclined to the rotation axis. We further conclude that the convection zone and at least the outer part of the radiative interior rotate on the same axis.

AB - The radiative interior of the Sun could be hiding a large-scale magnetic field, which might not be axisymmetric about the observed rotation axis. Using helioseismic data, we estimate that the strength of any such relic field must be less than about 30 MG, if the field is axisymmetric about the rotation axis. The shape oblateness caused by a field at this limiting strength is about 5-10 × 10-6. Stronger fields can be accommodated by the helioseismic data if they are inclined to the rotation axis. We further conclude that the convection zone and at least the outer part of the radiative interior rotate on the same axis.

KW - Sun: interior

KW - Sun: magnetic fields

KW - Sun: oscillations

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JF - Astrophysical Journal

IS - 1

ER -

The effect of an inclined magnetic field on solar oscillation frequencies

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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