The Suppression and Promotion of Magnetic Flux Emergence in Fully Convective Stars
| Autor: | Edward Townsend, Suzannah Boardman, Joshua Clarke, Maria A. Weber, Samuel Pugsley, Matthew K. Browning |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Convection Magnetism Flux FOS: Physical sciences Astronomy and Astrophysics Astrophysics 01 natural sciences Magnetic flux Magnetic field Physics::Fluid Dynamics Convection zone Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science 0103 physical sciences Differential rotation Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Magnetohydrodynamics 010306 general physics 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) |
| Popis: | Evidence of surface magnetism is now observed on an increasing number of cool stars. The detailed manner by which dynamo-generated magnetic fields giving rise to starspots traverse the convection zone still remains unclear. Some insight into this flux emergence mechanism has been gained by assuming bundles of magnetic field can be represented by idealized thin flux tubes (TFTs). Weber & Browning (2016) have recently investigated how individual flux tubes might evolve in a 0.3 solar-mass M dwarf by effectively embedding TFTs in time-dependent flows representative of a fully convective star. We expand upon this work by initiating flux tubes at various depths in the upper 50-75% of the star in order to sample the differing convective flow pattern and differential rotation across this region. Specifically, we comment on the role of differential rotation and time-varying flows in both the suppression and promotion of the magnetic flux emergence process. 8 pages, 5 figures, accepted for publication in the International Astronomical Union Proceedings Series for IAUS 328 - 'Living Around Active Stars' |
| Databáze: | OpenAIRE |
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