Dynamics of the Solar Magnetic Field. II. The Energy Spectrum of Large-Scale Solar Magnetic Fields

Abstract

view Abstract Citations (22) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Dynamics of the Solar Magnetic Field. II. The Energy Spectrum of Large-Scale Solar Magnetic Fields Nakagawa, Y. ; Levine, Randolph H. Abstract The energy spectrum of large-scale solar magnetic fields is obtained as a function of the circumferential wavenumber k along the heliographic latitudinal circle from the full-disk magnetograms of the Kitt Peak National Observatory covering one solar rotation. It is shown that the spectra in the higher latitudinal zones are different from those in the lower latitudinal zones. For the lower latitudinal zones between 35 N and 30 S, the energy spectrum is closely characterized by k -1 dependence, while for the higher-latitudinal zones the spectrum follows approximately k -3 dependence. It is then shown that these dependences can be interpreted in terms of the theory of passive response of the magnetic field to turbulent fluid motions, and that the difference between the k -1 and k -3 dependences can be attributed to the difference in the balance between the magnetic energy supply and dissipation in the higher and lower latitudinal zones. Subject headings: hydromagnetics - magnetic fields, solar - turbulence Publication: The Astrophysical Journal Pub Date: June 1974 DOI: 10.1086/152896 Bibcode: 1974ApJ...190..441N full text sources ADS | Related Materials (2) Part 1: 1974ApJ...190..437N Part 3: 1974ApJ...190..703L