Parity properties of an advection-dominated solar 2 -dynamo

摘要: We have developed a high-precision code which solves the kinematic dynamo problem both for given rotation law and meridional flow in case of low eddy diusivity order 10 11 cm 2 s 1 known from sunspot decay. All our models work with an -eect is positive (negative) northern (southern) hemisphere. It concentrated radial layers located either at top or bottom convection zone. also considered an-eect uniformly distributed all In present paper main attention focused on i) parity solution, ii) form butterfly diagram iii) phase relation resulting field components. If helioseismologically derived internal solar considered, model without high magnetic Reynolds number (corresponding to diusivity) fails three issues comparison observations. However, equatorial drift zone few meters by second can indeed enforce equatorward migration toroidal belts similar observed but, solution has only dipolar if (positive)-eect base rather than top. can, therefore, confirm results study Dikpati & Gilman (2001).