Does the butterfly diagram indicate asolar flux-transport dynamo?

Details Does the butterfly diagram indicate asolar flux-transport dynamo? Does the butterfly diagram indicate asolar flux-transport dynamo?

2004-03-24

arxiv.org/abs/astro-ph/0403570v1

Astron.Astrophys. 421 (2004) 349-351

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure

Scientific paper

10.1051/0004-6361:20041302-1

We address the question whether the properties of the observed latitude-time diagram of sunspot occurence (the butterfly diagram) provide evidence for the operation of a flux-transport dynamo, which explains the migration of the sunspot zones and the period of the solar cycle in terms of a deep equatorward meridional flow. We show that the properties of the butterfly diagram are equally well reproduced by a conventional dynamo model with migrating dynamo waves, but without transport of magnetic flux by a flow. These properties seem to be generic for an oscillatory and migratory field of dipole parity and thus do not permit an observational distinction between different dynamo approaches.

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