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http://hdl.handle.net/1843/60850| Type: | Artigo de Periódico |
| Title: | Exploring shallow sunspot formation by using Implicit Large-eddy simulations |
| Authors: | Francisco Javier Camacho Rodriguez Gustavo Andres Guerrero Eraso Piotr Krzysztof Smolarkiewicz Alexander G. Kosovichev Nagi Nicolas Mansour |
| Abstract: | The mechanism by which sunspots are generated at the surface of the sun remains unclear. In the current literature two types of explanations can be found. The first one is related to the buoyant emergence of toroidal magnetic fields generated at the tachocline. The second one states that active regions are formed, from initially diffused magnetic flux, by MHD instabilities that develop in the near-surface layers of the Sun. Using the anelastic MHD code EULAG we address the problem of sunspot formation by performing implicit large-eddy simulations of stratified magneto-convection in a domain that resembles the near-surface layers of the Sun. The development of magnetic structures is explored as well as their effect on the convection dynamics. By applying a homogeneous magnetic field over an initially stationary hydrodynamic convective state, we investigate the formation of self-organized magnetic structures in the range of the initial magnetic field strength, 0.01 < B0/Beq < 0.5, where Beq is the characteristic equipartition field strength. |
| Subject: | Sol Campos magnéticos |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
| Rights: | Acesso Aberto |
| metadata.dc.identifier.doi: | https://doi.org/10.1017/S1743921317003921 |
| URI: | http://hdl.handle.net/1843/60850 |
| Issue Date: | 2016 |
| metadata.dc.url.externa: | https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/article/exploring-shallow-sunspot-formation-by-using-implicit-largeeddy-simulations/5F8A71882BAF15BF198D396642682DE7 |
| metadata.dc.relation.ispartof: | Proceedings of the International Astronomical Union |
| Appears in Collections: | Artigo de Periódico |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Exploring shallow sunspot formation.pdf | 268.99 kB | Adobe PDF | View/Open |
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