Bounds on the magnetic fields in the radiative zone of the Sun

Alexander Friedland, Andrei Gruzinov

    Research output: Contribution to journalArticle

    Abstract

    We discuss bounds on the strength of the magnetic fields that could be buried in the radiative zone of the Sun. The field profiles and decay times are computed for all axisymmetric toroidal ohmic decay eigenmodes with lifetimes exceeding the age of the Sun. The measurements of the solar oblateness yield a bound of ≲7 MG on the strength of the field. A comparable bound is expected to come from the analysis of the splitting of the solar oscillation frequencies. The theoretical analysis of the double diffusive instability also yields a similar bound. The oblateness measurements at their present level of sensitivity are therefore not expected to measure a toroidal field contribution.

    Original languageEnglish (US)
    Pages (from-to)570-576
    Number of pages7
    JournalAstrophysical Journal
    Volume601
    Issue number1 I
    DOIs
    StatePublished - Jan 20 2004

    Fingerprint

    solar oblateness
    sun
    magnetic field
    toroidal field
    solar oscillations
    decay
    magnetic fields
    oscillation
    life (durability)
    sensitivity
    profiles
    analysis

    Keywords

    • Sun: interior
    • Sun: magnetic fields

    ASJC Scopus subject areas

    • Space and Planetary Science

    Cite this

    Bounds on the magnetic fields in the radiative zone of the Sun. / Friedland, Alexander; Gruzinov, Andrei.

    In: Astrophysical Journal, Vol. 601, No. 1 I, 20.01.2004, p. 570-576.

    Research output: Contribution to journalArticle

    Friedland, Alexander ; Gruzinov, Andrei. / Bounds on the magnetic fields in the radiative zone of the Sun. In: Astrophysical Journal. 2004 ; Vol. 601, No. 1 I. pp. 570-576.
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