On the role of tachoclines in solar and stellar dynamos

Detalhes bibliográficos
Autor(a) principal: Gustavo Andres Guerrero Eraso
Data de Publicação: 2016
Outros Autores: Piotr Krzysztof Smolarkiewicz, Elisabete Maria de Gouveia Dal Pino, Alexander. G. Kosovichev, Nagi Nicolas Mansour
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFMG
Texto Completo: https://doi.org/10.3847/0004-637X/819/2/104
http://hdl.handle.net/1843/60312
https://orcid.org/0000-0002-2671-8796
https://orcid.org/0000-0001-7077-3285
https://orcid.org/0000-0001-8058-4752
https://orcid.org/0000-0002-3927-3917
Resumo: CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
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spelling 2023-10-31T13:05:25Z2023-10-31T13:05:25Z20168192117https://doi.org/10.3847/0004-637X/819/2/1041538-4357http://hdl.handle.net/1843/60312https://orcid.org/0000-0002-2671-8796https://orcid.org/0000-0001-7077-3285https://orcid.org/0000-0001-8058-4752https://orcid.org/0000-0002-3927-3917CNPq - Conselho Nacional de Desenvolvimento Científico e TecnológicoFAPESP - Fundação de Amparo à Pesquisa do Estado de São PauloRotational shear layers at the boundary between radiative and convective zones, tachoclines, play a key role in the process of magnetic field generation in solar-like stars. We present two sets of global simulations of rotating turbulent convection and dynamo. The first set considers a stellar convective envelope only; the second one, aiming at the formation of a tachocline, also considers the upper part of the radiative zone. Our results indicate that the resulting properties of the mean flows and dynamo, such as the growth rate, saturation energy, and mode, depend on the Rossby number (Ro). For the first set of models either oscillatory (with ∼2 yr period) or steady dynamo solutions are obtained. The models in the second set naturally develop a tachocline, which in turn leads to the generation of a strong mean magnetic field. Since the field is also deposited in the stable deeper layer, its evolutionary timescale is much longer than in the models without a tachocline. Surprisingly, the magnetic field in the upper turbulent convection zone evolves on the same timescale as the deep field. These models result in either an oscillatory dynamo with a ∼30 yr period or a steady dynamo depending on Ro. In terms of the mean-field dynamo coefficients computed using the first-order smoothing approximation, the field evolution in the oscillatory models without a tachocline seems to be consistent with dynamo waves propagating according to the Parker–Yoshimura sign rule. In the models with tachoclines the dynamics is more complex and involves other transport mechanisms as well as tachocline instabilities.engUniversidade Federal de Minas GeraisUFMGBrasilICX - DEPARTAMENTO DE FÍSICAThe Astrophysical JournalEstrelasSolSolar magnetic fieldsSolar rotationStarsSunSolar and stellar dynamosOn the role of tachoclines in solar and stellar dynamosinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://iopscience.iop.org/article/10.3847/0004-637X/819/2/104Gustavo Andres Guerrero ErasoPiotr Krzysztof SmolarkiewiczElisabete Maria de Gouveia Dal PinoAlexander. G. KosovichevNagi Nicolas Mansourapplication/pdfinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFMGinstname:Universidade Federal de Minas Gerais (UFMG)instacron:UFMGLICENSELicense.txtLicense.txttext/plain; charset=utf-82042https://repositorio.ufmg.br/bitstream/1843/60312/1/License.txtfa505098d172de0bc8864fc1287ffe22MD51ORIGINALON THE ROLE OF TACHOCLINES IN SOLAR AND STELLAR DYNAMOS.pdfON THE ROLE OF TACHOCLINES IN SOLAR AND STELLAR DYNAMOS.pdfapplication/pdf5652922https://repositorio.ufmg.br/bitstream/1843/60312/2/ON%20THE%20ROLE%20OF%20TACHOCLINES%20IN%20SOLAR%20AND%20STELLAR%20DYNAMOS.pdf462a41f0ae81be26c50fd7d28a26c94fMD521843/603122023-10-31 17:08:10.293oai:repositorio.ufmg.br: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Repositório de PublicaçõesPUBhttps://repositorio.ufmg.br/oaiopendoar:2023-10-31T20:08:10Repositório Institucional da UFMG - Universidade Federal de Minas Gerais (UFMG)false
dc.title.pt_BR.fl_str_mv On the role of tachoclines in solar and stellar dynamos
title On the role of tachoclines in solar and stellar dynamos
spellingShingle On the role of tachoclines in solar and stellar dynamos
Gustavo Andres Guerrero Eraso
Stars
Sun
Solar and stellar dynamos
Estrelas
Sol
Solar magnetic fields
Solar rotation
title_short On the role of tachoclines in solar and stellar dynamos
title_full On the role of tachoclines in solar and stellar dynamos
title_fullStr On the role of tachoclines in solar and stellar dynamos
title_full_unstemmed On the role of tachoclines in solar and stellar dynamos
title_sort On the role of tachoclines in solar and stellar dynamos
author Gustavo Andres Guerrero Eraso
author_facet Gustavo Andres Guerrero Eraso
Piotr Krzysztof Smolarkiewicz
Elisabete Maria de Gouveia Dal Pino
Alexander. G. Kosovichev
Nagi Nicolas Mansour
author_role author
author2 Piotr Krzysztof Smolarkiewicz
Elisabete Maria de Gouveia Dal Pino
Alexander. G. Kosovichev
Nagi Nicolas Mansour
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Gustavo Andres Guerrero Eraso
Piotr Krzysztof Smolarkiewicz
Elisabete Maria de Gouveia Dal Pino
Alexander. G. Kosovichev
Nagi Nicolas Mansour
dc.subject.por.fl_str_mv Stars
Sun
Solar and stellar dynamos
topic Stars
Sun
Solar and stellar dynamos
Estrelas
Sol
Solar magnetic fields
Solar rotation
dc.subject.other.pt_BR.fl_str_mv Estrelas
Sol
Solar magnetic fields
Solar rotation
description CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
publishDate 2016
dc.date.issued.fl_str_mv 2016
dc.date.accessioned.fl_str_mv 2023-10-31T13:05:25Z
dc.date.available.fl_str_mv 2023-10-31T13:05:25Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1843/60312
dc.identifier.doi.pt_BR.fl_str_mv https://doi.org/10.3847/0004-637X/819/2/104
dc.identifier.issn.pt_BR.fl_str_mv 1538-4357
dc.identifier.orcid.pt_BR.fl_str_mv https://orcid.org/0000-0002-2671-8796
https://orcid.org/0000-0001-7077-3285
https://orcid.org/0000-0001-8058-4752
https://orcid.org/0000-0002-3927-3917
url https://doi.org/10.3847/0004-637X/819/2/104
http://hdl.handle.net/1843/60312
https://orcid.org/0000-0002-2671-8796
https://orcid.org/0000-0001-7077-3285
https://orcid.org/0000-0001-8058-4752
https://orcid.org/0000-0002-3927-3917
identifier_str_mv 1538-4357
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.none.fl_str_mv The Astrophysical Journal
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Minas Gerais
dc.publisher.initials.fl_str_mv UFMG
dc.publisher.country.fl_str_mv Brasil
dc.publisher.department.fl_str_mv ICX - DEPARTAMENTO DE FÍSICA
publisher.none.fl_str_mv Universidade Federal de Minas Gerais
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFMG
instname:Universidade Federal de Minas Gerais (UFMG)
instacron:UFMG
instname_str Universidade Federal de Minas Gerais (UFMG)
instacron_str UFMG
institution UFMG
reponame_str Repositório Institucional da UFMG
collection Repositório Institucional da UFMG
bitstream.url.fl_str_mv https://repositorio.ufmg.br/bitstream/1843/60312/1/License.txt
https://repositorio.ufmg.br/bitstream/1843/60312/2/ON%20THE%20ROLE%20OF%20TACHOCLINES%20IN%20SOLAR%20AND%20STELLAR%20DYNAMOS.pdf
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repository.name.fl_str_mv Repositório Institucional da UFMG - Universidade Federal de Minas Gerais (UFMG)
repository.mail.fl_str_mv
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