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Browsing by Author "Hiremath, K. M"

Browsing by Author "Hiremath, K. M"

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  • Flares associated with abnormal rotation rates: Longitudinal minimum separation of leading and following sunspots 
    Hiremath, K. M; Suryanarayana, G. S; Lovely, M. R (EDP Sciences, 2005-07)
    Using six years (1969-1974) of data of sunspot groups from the white light pictures of the Kodaikanal Observatory, we compute rotation rates of the leading and the following sunspots and the rate of change of longitudinal ...
  • The flares associated with the abnormal rotation rates of the bipolar sunspots: Reconnection probably below the surface 
    Hiremath, K. M; Suryanarayana, G. S (The European Southern Observatory, 2003-12)
    We use the observations of Kodaikanal observatory white light pictures to study the association between the rotation rates of the bipolar sunspots and triggering of the flares. For the years 1969-1974, we compute daily ...
  • The Flares Associated with the Dynamics of the Sunspots 
    Hiremath, K. M (Indian Academy of Sciences, 2006-09)
    In the present study, we consider six years data of spot groups that have well developed leading and following spots obtained from the Kodaikanal Observatory white light pictures and occurrence of Hα flares. From the daily ...
  • Fossil magnetic fields of the sun and stars 
    Hiremath, K. M; Gokhale, M. H (Astronomical Society of India, 2000)
    Using helioseismologically inferred internal rotation given by Dziembowski et al., 1989, in the previous work, we (Hiremath and Gokhale 1995, Hiremath 1995) modelled the steady (fossil) part of the poloidal magnetic field ...
  • Indian summer monsoon rainfall: dancing with the tunes of the Sun 
    Hiremath, K. M; Hegde, M; Soon, Willie (Elsevier, 2015-02)
    There is strong statistical evidence that solar activity influences the Indian summer monsoon rainfall. To search for a physical link between the two, we consider the coupled cloud hydrodynamic equations, and derive an ...
  • Influence of solar activity on the rainfall over India ILWS Workshop 2006 
    Hiremath, K. M (Quest Publications for ILWS, 2006)
    We use 130 years of Indian rainfall for studying correlative effects due to solar cycle and activity phenomena, viz., the occurrences of sunspot activity and the irradiance variations. Among all the seasons of the Indian ...
  • The Influence of Solar Activity on the Rainfall over India: Cycle-to-Cycle Variations 
    Hiremath, K. M (Indian Academy of Sciences, 2006-09)
    We use 130 years data for studying correlative effects due to solar cycle and activity phenomena on the occurrence of rainfall over India. For the period of different solar cycles, we compute the correlation coefficients ...
  • Influence of the solar activity on the Indian Monsoon rainfall 
    Hiremath, K. M; Mandi, P. I (Elsevier, 2004-10)
    We use 130 years data for studying correlative effects due to solar cycle and activity phenomena on the occurrence of the Indian Monsoon rainfall. We compute the correlation coefficients and significance of correlation ...
  • Internal rotation and toroidal part of the magnetic field of AB Doradus 
    Hiremath, K. M (Astronomical Society of India, 2000)
    We solve analytically Chandrasekhar's (1956) MHD equations for the steady parts of internal rotation and toroidal component of the magnetic field of the AB Doradus. By taking observed (Donati and Cameron 1997) surface ...
  • Internal Rotation of AB Doradus 
    Hiremath, K. M (International Astronomical Union, 2000)
    Using Chandrasekhar's MHD equations, we solve for the steady part of the internal rotation of AB Doradus. We estimate the size of the convective envelope to be ~40% of the radius and the rotation velocity at the base to ...
  • Latitude character and evolution of Gnevyshev gap 
    Pandey, K. K; Hiremath, K. M; Yellaiah, G (Springer, 2017-06)
    The time interval, between two highest peaks of the sunspot maximum, during which activity energy substantially absorbed is called Gnevyshev gap. In this study we focus on mysterious evolution of the Gnevyshev gap by ...
  • Latitudinal distribution of soft x ray flares and dispairty in butterfly diagram 
    Pandey, K. K; Yellaiah, G; Hiremath, K. M (Springer, 2015-04)
    We present statistical analysis of about 63000 soft x-ray flare (class ≥C) observed by geostationary operational environmental satellite (GOES) during the period 1976-2008. Class wise occurrence of soft X-ray (SXR) flare ...
  • Longitudinal flows in stellar magnetic flux tubes 
    Gokhale, M. H; Hiremath, K. M (Elsevier, 1986)
    It is shown that if a thin, isolated and untwisted magnetic flux tube, consisting of a current-free core bounded by a thin current sheath, is in an ‘overall’ equilibrium in a stratified atmosphere, then there is, in general, ...
  • Lowering of asymmetry 
    Pandey, K. K; Hiremath, K. M; Yellaiah, G (Indian Academy of Sciences, 2017-03)
    Asymmetry, a well established fact, can be extracted from various solar atmospheric activity indices. Although asymmetry is being localized within short time scale, it also persists at different time scales. In the present ...
  • Magnetic Field Structure of Mercury 
    Hiremath, K. M (Elsevier B.V., 2012-04)
    Recently planet Mercury-an unexplored territory in our solar system-has been of much interest to the scientific community due to recent flybys of the spacecraft MESSENGER that discovered its intrinsic stationary and ...
  • Magnetic flux in the solar convective envelope inferred from the initial observations of the sunspots 
    Hiremath, K. M; Lovely, M. R (University of Chicago Press, 2007-09)
    Different life spans of the sunspots suggest their origin at different depths and by measuring magnetic fluxes from their first observation on the surface, one can estimate the strength of magnetic flux at different anchoring ...
  • Metallicity of Sun-like G-stars that have exoplanets 
    Gurumath, S. R; Hiremath, K. M; Ramasubramanian, V (Indian Academy of Sciences, 2017-07)
    By considering the physical and orbital characteristics of G type stars and their exoplanets, we examine the association between stellar mass and its metallicity that follows a power law. Similar relationship is also ...
  • Model of 'steady' Parts of Rotation and Magnetic Field in the Sun's Convection Zone 
    Hiremath, K. M; Gokhale, M. H (European Space Agency, 1995-06)
    We present a preliminary model of the ‘steady’ parts of rotation and magnetic field in the sun’s convective envelope, which vary on diffusion time scales, within the frame work of axisymmetric incompressible hydromagnetics ...
  • A model of the 'steady' and 'fluctuating' parts of the sun's internal magnetic field 
    Gokhale, M. H; Hiremath, K. M (American Astronomical Society, 1993-04-10)
    We model the structure of the 'steady' (slowest varying) part of the sun's internal poloidal magnetic field assuming it to be (for given reasons and in the relevant domain) a current-free field whose field lines 'isorotate' ...
  • Nearly Century-scale Variation of the Sun’s Radius 
    Hiremath, K. M; Rozelot, J. P; Sarp, V; Kilcik, A; Pavan, D. G; Gurumath, S. R (IOP Publishing, 2020-03-10)
    The Kodaikanal Archive Program (India) is now available to the scientific community in digital form as daily digitized solar white light pictures, from 1923 to 2011. We present here the solar radius data, obtained after a ...

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