Inferring magnetic helicity spectrum in spherical domains: the method and example applications
A. P. Prabhu,
N. K. Singh,
M. J. Käpylä
et al.
Abstract:Context. Obtaining observational constraints on the role of turbulent effects for the solar dynamo is a difficult, yet crucial, task. Without such knowledge, the full picture of the operation mechanism of the solar dynamo cannot be formed. Aims. The magnetic helicity spectrum provides important information about the α effect. Here we demonstrate a formalism in spherical geometry to infer magnetic helicity spectra directly from observations of the magnetic field, taking into account the sign change of magnetic … Show more
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