Evolution of active regions based on solar-surface magnetic flux observations and coronal magnetic fields extrapolations: a case-study of NOAA 12443

Detalhes bibliográficos
Ano de defesa: 2017
Autor(a) principal: André Chicrala Amaral Silva
Orientador(a): Renato Sergio Dallaqua, Judit Palacios Hernández
Banca de defesa: Joaquim Eduardo Rezende Costa, Jean Pierre Raulin
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: eng
Instituição de defesa: Instituto Nacional de Pesquisas Espaciais (INPE)
Programa de Pós-Graduação: Programa de Pós-Graduação do INPE em Geofísica Espacial/Ciências do Ambiente Solar-Terrestre
Departamento: Não Informado pela instituição
País: BR
Link de acesso: http://urlib.net/sid.inpe.br/mtc-m21b/2017/07.07.18.24
Resumo: The solar surface is often populated by Active Regions (ARs) that are known for their intense magnetic field when compared to the solar quiet regions. During their evolution the ARs may give rise to energetic events such as flares or Coronal Mass Ejections (CMEs). In this work, data collected from the instruments Helioseismic and Magnetic Imager (HMI) and Hinode were used to measure the magnetic field in the Photosphere, using Stokes profiles, and to extrapolate those magnetic field vectors to the layers above: Chromosphere and Corona whose magnetic field cannot be directly measured with the available equipment and techniques. Since the behaviour of a plasma is strongly dependent on the magnetic field the results were applied to study the behaviour of the active region NOAA 12443. The results include maps of the Stokes parameters measured over NOAA 12443, the velocity fields along the Line Of Sight, a study of the behaviour of the currents and helicity of the region, the energy evolution of NOAA 12443 using a linear force free approach and a scenario studying some of the possible causes of the flaring activity and if this flare was an sympathetic event.