Chakraborty Sagar, Choudhuri Arnab Rai, Chatterjee Piyali
Department of Theoretical Sciences, S. N. Bose Centre for Basic Sciences, Kolkata-700098, India.
Phys Rev Lett. 2009 Jan 30;102(4):041102. doi: 10.1103/PhysRevLett.102.041102. Epub 2009 Jan 29.
Although the Sun's torsional oscillation is believed to be driven by the Lorentz force associated with the sunspot cycle, this oscillation begins 2-3 yr before the sunspot cycle. We provide a theoretical explanation of this with the help of a solar dynamo model having a meridional circulation penetrating slightly below the bottom of the convection zone, because only in such dynamo models does the strong toroidal field form a few years before the sunspot cycle and at a higher latitude.
尽管太阳的扭转振荡被认为是由与太阳黑子周期相关的洛伦兹力驱动的，但这种振荡在太阳黑子周期开始前2至3年就已出现。我们借助一个太阳发电机模型对此给出了理论解释，该模型具有一个稍微深入对流层底部以下的子午环流，因为只有在这样的发电机模型中，强环形磁场才会在太阳黑子周期前几年且在更高纬度形成。
