Turbulent magnetic pumping in a Babcock-Leighton solar dynamo model

Abstract

The turbulent pumping effect corresponds to the transport of magnetic flux due to the presence of density and turbulence gradients in convectively unstable layers. In the induction equation it appears as an advective term and for this reason it is expected to be important in the solar and stellar dynamo processes. In this work, we have explored the effects of the turbulent pumping in a flux-dominated Babcock-Leighton solar dynamo model with a solar-like rotation law. The results reveal the importance of the pumping mechanism for solving current limitations in mean field dynamo modeling such as the storage of the magnetic flux and the latitudinal distribution of the sunspots. In the case that a meridional flow is assumed to be present only in the upper part of the convective zone, it is the full turbulent pumping that regulates both the period of the solar cycle and the latitudinal distribution of the sunspots activity.

7 pages, 8 figures, accepted for publication in Astronomy & Astrophysics

References in corpus (6)

• The case for a distributed solar dynamo shaped by near-surface shear
• On the role of meridional flows in flux transport dynamo models
• Magnetoconvection and dynamo coefficients III: alpha-effect and magnetic pumping in the rapid rotation regime
• Solar dynamo models with alpha-effect and turbulent pumping from local 3D convection calculations
• How does the shape and thickness of the tachocline affect the distribution of the toroidal magnetic fields in the solar dynamo?
• Flux-dominated solar dynamo model with a thin shear layer

Cited by in corpus (16)

• Solar Cycle Propagation, Memory, and Prediction: Insights from a Century of Magnetic Proxies
• Alpha effect and turbulent diffusion from convection
• The Solar-Stellar Connection
• Helioseismic data inclusion in solar dynamo models
• A theoretical study of the build-up of the Sun's polar magnetic field by using a 3D kinematic dynamo model
• Quenching and anisotropy of hydromagnetic turbulent transport
• A proposed paradigm for solar cycle dynamics mediated via turbulent pumping of magnetic flux in Babcock-Leighton type solar dynamos
• How supercritical are stellar dynamos, or why do old main-sequence dwarfs not obey gyrochronology?
• The role of diffusivity quenching in flux-transport dynamo models
• Shear-driven and diffusive helicity fluxes in alpha-Omega dynamos
• Stellar dynamos with $\vec{\Omega }\times \vec{J}$ effect
• Magnetic helicity fluxes in interface and flux transport dynamos
• Can the long-term hemispheric asymmetry of solar activity result from fluctuations in dynamo parameters?
• The solar dynamo: inferences from observations and modeling
• The need for active region disconnection in 3D kinematic dynamo simulations
• A Critical Assessment of the Flux Transport Dynamo