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Abstract:

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.

Registro:

Documento: Artículo
Título:Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows
Autor:Baker, D.; Van Driel-Gesztelyi, L.; Mandrini, C.H.; Démoulin, P.; Murray, M.J.
Filiación:University College London, Mullard Space Science Laboratory, Holmbury St. Mary, Dorking, Surrey RH5 6NT, United Kingdom
Observatoire de Paris, LESIA, UMR 8109 (CNRS), Meudon-Principal Cedex, France
Konkoly Observatory, Hungarian Academy of Sciences, Budapest, Hungary
Instituto de Astronomía y Física Del Espacio, CONICET-UBA, CC. 67, Suc. 28, 1428 Buenos Aires, Argentina
Palabras clave:Atmospheric motions Sun; Corona Sun; Magnetic fields; Sun
Año:2009
Volumen:705
Número:1
Página de inicio:926
Página de fin:935
DOI: http://dx.doi.org/10.1088/0004-637X/705/1/926
Título revista:Astrophysical Journal
Título revista abreviado:Astrophys. J.
ISSN:0004637X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v705_n1_p926_Baker

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Citas:

---------- APA ----------
Baker, D., Van Driel-Gesztelyi, L., Mandrini, C.H., Démoulin, P. & Murray, M.J. (2009) . Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows. Astrophysical Journal, 705(1), 926-935.
http://dx.doi.org/10.1088/0004-637X/705/1/926
---------- CHICAGO ----------
Baker, D., Van Driel-Gesztelyi, L., Mandrini, C.H., Démoulin, P., Murray, M.J. "Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows" . Astrophysical Journal 705, no. 1 (2009) : 926-935.
http://dx.doi.org/10.1088/0004-637X/705/1/926
---------- MLA ----------
Baker, D., Van Driel-Gesztelyi, L., Mandrini, C.H., Démoulin, P., Murray, M.J. "Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows" . Astrophysical Journal, vol. 705, no. 1, 2009, pp. 926-935.
http://dx.doi.org/10.1088/0004-637X/705/1/926
---------- VANCOUVER ----------
Baker, D., Van Driel-Gesztelyi, L., Mandrini, C.H., Démoulin, P., Murray, M.J. Magnetic reconnection along quasi-separatrix layers as a driver of ubiquitous active region outflows. Astrophys. J. 2009;705(1):926-935.
http://dx.doi.org/10.1088/0004-637X/705/1/926