Browsing by Subject "Spherical harmonics"

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Does sunspot activity originate in slow global oscillations of the sun?

Gokhale, M. H (Indian Academy of Sciences, 1986-12)

A Fourier analysis of sunspot activity during the 1933-1954 period using data entending over the first 10 degrees and all azimuthal orders of the spherical harmonics is presented, and results suggest that the sunspot ...
Global modes constituting the solar magnetic cycle. I - Search for 'dispersion relations'

Gokhale, M. H; Javaraiah, J; Kutty, K. N; Varghese, B. A (Springer Netherlands, 1992-03)

The spherical-harmonic-Fourier (SHF) analysis of the sun's magnetic field inferred from the Greenwich sunspot data is refined and extended to include the full length (1874-1976) of the data on the magnetic tape provided ...
Interpretation of the 'third harmonic' of the solar magnetic cycle

Gokhale, M. H; Javaraiah, J (International Astronomical Union, 1990)

The behavior and significance of a third harmonic peak at about 3/22/y which is present in the spectra of all the odd degree axisymmetric modes with respect to the temporal frequency are investigated. The correlation between ...
Sunspot activity as originating in interference of the sun's global MHD oscillations

Gokhale, M. H; Javaraiah, J (Royal Astronomical Society, 1990-03)

Spherical-harmonic-Fourier (SHF) analysis of sunspot activity during 1902-54 show that the sunspot occurrence probability p(theta, phi, t) is given by superposition of, mainly, axisymmetric even degree SHF modes of l not ...

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