Estimates of Current Helicity and Tilt of Solar Active Regions and Joy’s Law

K. Kuzanyan, N. Kleeorin, I. Rogachevskii, D. Sokoloff, H. Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract: The tilt angle, current helicity and twist of solar magnetic fields can be observed in solar active regions. We carried out estimates of these parameters by two ways. Firstly, we consider the model of turbulent convective cells (super-granules) which have a loop floating structure towards the surface of the Sun. Their helical properties are attained during the rising process in the rotating stratified convective zone. The other estimate is obtained from a simple mean-field dynamo model that accounts magnetic helicity conservation. The both values are shown to be capable to give important contributions to the observable tilt, helicity and twist.

Original languageEnglish
Pages (from-to)1032-1037
Number of pages6
JournalGeomagnetism and Aeronomy
Volume60
Issue number8
DOIs
StatePublished - 1 Dec 2020

Keywords

  • Sun: magnetic field: sunspots: tilt, twist, helicity
  • turbulence: mean-field magnetohydrodynamics

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