Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows

Hinode's EUV Imaging Spectrometer (EIS) has discovered ubiquitous outflows of a few to 50 km s-1 from active regions (ARs). These outflows are most prominent at the AR boundary and appear over monopolar magnetic areas. They are linked to strong non-thermal line broadening and are stronger in ho...

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Guardado en:
Detalles Bibliográficos
Publicado: 2009
Materias:
Atmospheric motions Sun
Corona Sun
Magnetic fields
Sun
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v705_n1_p926_Baker
http://hdl.handle.net/20.500.12110/paper_0004637X_v705_n1_p926_Baker
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0004637X_v705_n1_p926_Baker
record_format dspace
spelling paper:paper_0004637X_v705_n1_p926_Baker2023-06-08T14:28:58Z Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows Atmospheric motions Sun Corona Sun Magnetic fields Sun Hinode's EUV Imaging Spectrometer (EIS) has discovered ubiquitous outflows of a few to 50 km s-1 from active regions (ARs). These outflows are most prominent at the AR boundary and appear over monopolar magnetic areas. They are linked to strong non-thermal line broadening and are stronger in hotter EUV lines. The outflows persist for at least several days. Using Hinode EIS and X-Ray Telescope observations of AR 10942 coupled with magnetic modeling, we demonstrate that the outflows originate from specific locations of the magnetic topology where field lines display strong gradients of magnetic connectivity, namely quasi-separatrix layers (QSLs), or in the limit of infinitely thin QSLs, separatrices. We found the strongest AR outflows to be in the vicinity of QSL sections located over areas of strong magnetic field. We argue that magnetic reconnection at QSLs separating closed field lines of the AR and either large-scale externally connected or "open" field lines is a viable mechanism for driving AR outflows which are likely sources of the slow solar wind. © 2009. The American Astronomical Society. All rights reserved. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v705_n1_p926_Baker http://hdl.handle.net/20.500.12110/paper_0004637X_v705_n1_p926_Baker
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Atmospheric motions Sun
Corona Sun
Magnetic fields
Sun
spellingShingle Atmospheric motions Sun
Corona Sun
Magnetic fields
Sun
Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows
topic_facet Atmospheric motions Sun
Corona Sun
Magnetic fields
Sun
description Hinode's EUV Imaging Spectrometer (EIS) has discovered ubiquitous outflows of a few to 50 km s-1 from active regions (ARs). These outflows are most prominent at the AR boundary and appear over monopolar magnetic areas. They are linked to strong non-thermal line broadening and are stronger in hotter EUV lines. The outflows persist for at least several days. Using Hinode EIS and X-Ray Telescope observations of AR 10942 coupled with magnetic modeling, we demonstrate that the outflows originate from specific locations of the magnetic topology where field lines display strong gradients of magnetic connectivity, namely quasi-separatrix layers (QSLs), or in the limit of infinitely thin QSLs, separatrices. We found the strongest AR outflows to be in the vicinity of QSL sections located over areas of strong magnetic field. We argue that magnetic reconnection at QSLs separating closed field lines of the AR and either large-scale externally connected or "open" field lines is a viable mechanism for driving AR outflows which are likely sources of the slow solar wind. © 2009. The American Astronomical Society. All rights reserved.
title Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows
title_short Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows
title_full Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows
title_fullStr Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows
title_full_unstemmed Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows
title_sort magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v705_n1_p926_Baker
http://hdl.handle.net/20.500.12110/paper_0004637X_v705_n1_p926_Baker
_version_ 1768544158338777088

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