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Browsing by Author "Gokhale, M. H"

Browsing by Author "Gokhale, M. H"

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  • Solar activity 
    Gokhale, M. H (Indian Institute of Astrophysics, Bangalore, 1988)
    Sun could have had a nice and perfect spherical symmetry in its atmosphere and probably no variations on time scales smaller than hundreds of thousands of years if (i) the energy produced in its core could be transported ...
  • Solar Dynamo Problem 
    Gokhale, M. H (Indian Institute of Astrophysics, Bangalore, 1984)
  • Solar Dynamo Problem 
    Gokhale, M. H (Indian Institute of Astrophysics, Banglore, 1984)
    The origin of solar magnetic field and the flux tube nature of this field on the smallest observed scales are two key problems in solar magnetohydrodynamics. Despite the sucess of kinematical models based on the turbulent ...
  • Solar magnetic field and rotation 
    Gokhale, M. H (Indian Institute of Astrophysics, Bangalore, 1988)
    Sun’s highly inhomogeneous asymmetrical, and time dependent magnetic field plays a vital role in the non-Radiative energy transport that maintains the inhomogeneous asymmetrical and time dependent atmosphere of the sun ...
  • Steady and fluctuating parts of sun's internal magnetic field 
    Gokhale, M. H; Hiremath, K. M (International Astronomical Union, 1993-01)
    We have modeled the 'steady' part of sun's internal poloidal magnetic field in the form of a central dipole and a central hexapole with strengths (0.6 +/- 0.1)B(o)R(0) exp 3 and (0.16 +/- 0.05)B(o)R(0) exp 5 embedded in ...
  • Steady part of the sun's internal rotation 
    Hiremath, K. M; Gokhale, M. H (Astronomical Society of India, 1998)
    It is shown that steady part of rotation in the Sun's convective envelope (CE) and radiative core (RC)can be determined as an analytical solution of the diffusion equation in an incompressible medium of constant diffusivity. ...
  • Steady parts of rotation and magnetic field in the sun's convective envelope 
    Hiremath, K. M; Gokhale, M. H (Astronomical Society of India, 1996)
    We use the full set of Chandrasekhar's (1956) MHD equations for determining the steady parts of rotation and poloidal as well as toroidal magnetic field, in the Sun's convective envelope assuming incompressibility. The ...
  • "Steady" and "Fluctuating" Parts of the Sun's Internal Magnetic Field: Improved Model 
    Hiremath, K. M; Gokhale, M. H (The American Astronomical Society, 1995-07)
    Using reasonable assumptions and approximations it is shown that the poloidal component part of the magnetic field in the Sun's radiative core (RC) and convection zone (CE) can be modeled as in an analytical solution of ...
  • Structure and Evolution of a Sunspot 
    Gokhale, M. H (Astronomical Society of India, 1976-12)
  • Study of Longperiod Global Oscillations of Sun Through Spherical Harmonic Fourier Analysis of Sunspot Activity 
    Gokhale, M. H (International Astronomical Union, 1988)
    A spherical harmonic Fourier analysis of the maximum areas of sunspot groups listed in Ledgers I and II of Greenwich photoheliographic results for 1933 - 1954 yield significant peaks at the 11 y periodicity for some spherical ...
  • Study of Sun's "hydromagnetic" Oscillations Using Sunspot Data 
    Gokhale, M. H; Javaraiah, J; Hiremath, K. M (International Astronomical Union, 1990)
    Spherical-harmonic-fourier (SHF) analysis of sun’s ‘nominal toroidal magnetic field’, computed using sunspot data during 1874-1976, shows that sunspot activity can be considered as possibly originating in interference of ...
  • 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 ...
  • Sunspot Groups as Tracers of Sub-surface Processes 
    Gokhale, M. H (Indian Academy of Sciences, 2000-12)
    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's surface. I present here ...
  • Thermal overstability of hydromagnetic surface waves 
    Joarder, P. S; Gokhale, M. H; Venkatakrishnan, P (Kluwer Academic Publishers, 1987-09)
    The authors investigate the effects of radiative heat losses and thermal conductivity on the hydromagnetic surface waves along a magnetic discontinuity in a plasma of infinite electrical conductivity. They show that the ...
  • Torsional MHD Oscillations of the Sun 
    Hiremath, K. M; Gokhale, M. H (The Korean Astronomical Society, 1996-12)
    Assuming that the solar activity and the solar cycle phenomena may be manifestations of global torsional MHD oscillations, we compute the Alfven wave travel times along the field lines in the five models of magnetic field ...
  • Transmission of acoustic wave energy across a magnetic flux sheath 
    Venkatakrishnan, P; Gokhale, M. H (Springer, 1977-10)
    The transmission of the energy of an acoustic wave incident on a magnetic flux sheath embedded in a homogeneous nonmagnetic plasma is analyzed for the case where finite current sheets are situated between the flux sheath ...
  • The two components in the distribution of sunspot groups with respect to their maximum areas 
    Gokhale, M. H; Sivaraman, K. R (Springer, 1981-12)
    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 ...
  • The two components of the solar activity cycle as a consequence of the shock transition model of the solar magnetic cycle 
    Gokhale, M. H (Indian Institute of Astrophysics, 1979-11)
    Justification is given for comparing the consequences of the shock transition model of the solar magnetic cycle with important observed properties of the solar activity cycle without waiting for the basic postulates of the ...
  • Variations in the rotational velocity of sunspot groups during their lifetimes. 
    Gokhale, M. H; Hiremath, K. M (Astronomical Society of India, 1984-12)
  • Waves in the sunspot penumbra 
    Antia, H. M; Chitre, S. M; Gokhale, M. H (Springer, 1978-11)
    Sunspot theory is discussed with reference to the role played by the spot magnetic field in influencing the mode of energy transport. Consideration is given to the stability of a plane parallel polytropic fluid layer with ...

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