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Browsing by Author "Choudhuri, A. R"

Browsing by Author "Choudhuri, A. R"

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  • The solar dynamo with meridional circulation 
    Choudhuri, A. R; Schuessler, M; Dikpati, M (European Southern Observatory, 1997-03)
    In the mathematical form for the coefficient given in the expression (4) in this paper, the value of the parameters d and d should actually be 0.025R/sub0 instead of as printed. We became aware of this typographical error ...
  • The solar dynamo with meridional circulation. 
    Choudhuri, A. R; Schussler, M; Dikpati, M (1995-11)
    We show that meridional circulation can have a profound influence on dynamo models for the solar cycle. Motivated by the observed tilt angles of sunspot groups we assume that the generation of the poloidal field takes place ...
  • Solar physics in India: developments from the nineteenth century to the present era 
    Hasan, S. S; Choudhuri, A. R; Rajaguru, S. P (Astronomical Society of India, 2011)
    Modern solar astronomy took root in India with the discovery of helium during the total solar eclipse of 1868 and followed by the setting up of the Kodaikanal Observatory in 1899. We provide a brief overview of the growth ...
  • A theoretical model of the near-surface shear layer of the Sun 
    Jha, Bibhuti K; Choudhuri, A. R (Oxford University Press on behalf of the Royal Astronomical Society, 2021-09)
    The Sun has a near-surface shear layer (NSSL), within which the angular velocity decreases rapidly with radius. We provide an explanation of this layer based on the thermal wind balance equation. Since convective motions ...
  • A theoretical study of the Build-Up of the Sun's Polar Magnetic Field by using a 3D Kinematic Dynamo Model 
    Hazra, G; Choudhuri, A. R; Miesch, Mark S (IOP Publishing, 2017-01-20)
    We develop a three-dimensional kinematic self-sustaining model of the solar dynamo in which the poloidal field generation is from tilted bipolar sunspot pairs placed on the solar surface above regions of strong toroidal ...

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