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A theoretical study of the Build-Up of the Sun's Polar Magnetic Field by using a 3D Kinematic Dynamo Model

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dc.contributor.author Hazra, G
dc.contributor.author Choudhuri, A. R
dc.contributor.author Miesch, Mark S
dc.date.accessioned 2020-11-17T14:29:47Z
dc.date.available 2020-11-17T14:29:47Z
dc.date.issued 2017-01-20
dc.identifier.citation The Astrophysical Journal, Vol. 835, No. 1, 39 en_US
dc.identifier.issn 0004-637X
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7162
dc.description Restricted Access © The American Astronomical Society https://doi.org/10.3847/1538-4357/835/1/39 en_US
dc.description.abstract 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 field by using the SpotMaker algorithm, and then the transport of this poloidal field to the tachocline is primarily caused by turbulent diffusion. We obtain a dipolar solution within a certain range of parameters. We use this model to study the build-up of the polar magnetic field and show that some insights obtained from surface flux transport models have to be revised. We present results obtained by putting a single bipolar sunspot pair in a hemisphere and two symmetrical sunspot pairs in two hemispheres. We find that the polar fields produced by them disappear due to the upward advection of poloidal flux at low latitudes, which emerges as oppositely signed radial flux and which is then advected poleward by the meridional flow. We also study the effect that a large sunspot pair, violating Hale's polarity law, would have on the polar field. We find that there would be some effect—especially if the anti-Hale pair appears at high latitudes in the mid-phase of the cycle—though the effect is not very dramatic. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject Sun: activity en_US
dc.subject Sun: interior en_US
dc.subject Sun: magnetic fields en_US
dc.subject Sunspots en_US
dc.title A theoretical study of the Build-Up of the Sun's Polar Magnetic Field by using a 3D Kinematic Dynamo Model en_US
dc.type Article en_US


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