Exploring shallow sunspot formation by using Implicit Large-eddy simulations

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dc.creatorFrancisco Javier Camacho Rodriguez
dc.creatorGustavo Andres Guerrero Eraso
dc.creatorPiotr Krzysztof Smolarkiewicz
dc.creatorAlexander G. Kosovichev
dc.creatorNagi Nicolas Mansour
dc.date.accessioned2023-11-13T12:38:52Z
dc.date.accessioned2025-09-08T23:30:14Z
dc.date.available2023-11-13T12:38:52Z
dc.date.issued2016
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1017/S1743921317003921
dc.identifier.issn1743-9221
dc.identifier.urihttps://hdl.handle.net/1843/60850
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofProceedings of the International Astronomical Union
dc.rightsAcesso Aberto
dc.subjectSol
dc.subjectCampos magnéticos
dc.subject.otherConvection
dc.subject.otherTurbulence
dc.subject.otherSunspots
dc.subject.otherImplicit Large-eddy simulations
dc.titleExploring shallow sunspot formation by using Implicit Large-eddy simulations
dc.typeArtigo de periódico
local.citation.epage119
local.citation.issue328
local.citation.spage117
local.citation.volume12
local.description.resumoThe 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.
local.identifier.orcidhttps://orcid.org/0000-0002-2671-8796
local.identifier.orcidhttps://orcid.org/0000-0001-7077-3285
local.identifier.orcidhttps://orcid.org/0000-0003-0364-4883
local.identifier.orcidhttps://orcid.org/0000-0002-3927-3917
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/article/exploring-shallow-sunspot-formation-by-using-implicit-largeeddy-simulations/5F8A71882BAF15BF198D396642682DE7

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