Artículo
Outflows at the edges of active regions: Contribution to solar wind formation?
Harra, L. K.; Sakao, T.; Mandrini, Cristina Hemilse
; Hara, H.; Imada, S.; Young, P. R.; van Driel Gesztelyi, Lidia; Baker, D.
Fecha de publicación:
12/2008
Editorial:
IOP Publishing
Revista:
Astrophysical Journal
ISSN:
0004-637X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The formation of the slow solar wind has been debated for many years. In this Letter we show evidence of persistent outflow at the edges of an active region as measured by the EUV Imaging Spectrometer on board Hinode. The Doppler velocity ranged between 20 and 50 km s^-1 and was consistent with a steady flow seen in the X-Ray Telescope. The latter showed steady, pulsing outflowing material and some transverse motions of the<br />loops. We analyze the magnetic field around the active region and produce a coronal magnetic field model. We determine from the latter that the outflow speeds adjusted for line-of-sight effects can reach over 100 km s^-1. We can interpret this outflow as expansion of loops that lie over the active region, which may either reconnect with neighboring large-scale loops or are likely to open to the interplanetary space. This material constitutes at<br />least part of the slow solar wind.
Palabras clave:
Sun; Magnetic Fields
,
Sun: Solar Wind
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Articulos(IAFE)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Citación
Harra, L. K.; Sakao, T.; Mandrini, Cristina Hemilse; Hara, H.; Imada, S.; et al.; Outflows at the edges of active regions: Contribution to solar wind formation?; IOP Publishing; Astrophysical Journal; 676; 2; 12-2008; 147-150
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