On the Compatibility of a Flux Transport Dynamo with a Fast Tachocline Scenario

Bidya Bina Karak, K. Petrovay

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The compatibility of the fast-tachocline scenario with a flux-transport dynamo model is explored. We employ a flux-transport dynamo model coupled with simple feedback formulae relating the thickness of the tachocline to the amplitude of the magnetic field or to the Maxwell stress. The dynamo model is found to be robust against the nonlinearity introduced by this simplified fast-tachocline mechanism. Solar-like butterfly diagrams are found to persist and, even without any parameter fitting, the overall thickness of the tachocline is well within the range admitted by helioseismic constraints. In the most realistic case of a time- and latitude-dependent tachocline thickness linked to the value of the Maxwell stress, both the thickness and its latitudinal dependence are in excellent agreement with seismic results. In nonparametric models, cycle-related temporal variations in tachocline thickness are somewhat larger than admitted by helioseismic constraints; we find, however, that introducing a further parameter into our feedback formula readily allows further fine tuning of the thickness variations.

Original languageEnglish
Pages (from-to)321-334
Number of pages14
JournalSolar Physics
Volume282
Issue number2
DOIs
Publication statusPublished - Jan 2013

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compatibility
butterfly
nonlinearity
temporal variation
diagram
magnetic field
diagrams
tuning
cycles
magnetic fields
parameter

Keywords

  • Dynamo
  • Tachocline

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

On the Compatibility of a Flux Transport Dynamo with a Fast Tachocline Scenario. / Karak, Bidya Bina; Petrovay, K.

In: Solar Physics, Vol. 282, No. 2, 01.2013, p. 321-334.

Research output: Contribution to journalArticle

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