M. H. Gokhale
Articles written in Journal of Astrophysics and Astronomy
Volume 2 Issue 4 December 1981 pp 365-377
From an analysis of the distribution of sunspot groups with respect to their maximum areas we find that this distribution consists of two distinct components. One component contributes to spot groups of all possible values of A* with a distribution density varying as ∼ exp (b1 á*1/2) with b1 nearly constant from cycle
Volume 7 Issue 4 December 1986 pp 241-257
We present preliminary results of a spherical-harmonic-Fourier analysis of sunspot activity during the twenty-two years 1933–1954. The results indicate that the sunspot activity might be originating in global solar oscillations with periods of years and decades. However, except for the axisymmetric mode of degree 6, the set of other axisymmetric modes showing ∼ 11 yr periodicities are different from one sunspot cycle to another. A more detailed analysis, preferably with larger data series, will be needed to arrive at a more definite conclusion.
Volume 21 Issue 3-4 September 2000 pp 155-160
Data on sunspot groups have been quite useful for obtaining clues to several processes on global and local scales within the sun which lead to emergence of toroidal magnetic flux above the sun&#x2019;s surface. I present here a report on such studies carried out at Indian Institute of Astrophysics during the last decade or so.
Volume 40 | Issue 6
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