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Culhane, J.L.; Brooks, D.H.; van Driel-Gesztelyi, L.; Démoulin, P.; Baker, D.; DeRosa, M.L.; Mandrini, C.H.; Zhao, L.; Zurbuchen, T.H. "Tracking Solar Active Region Outflow Plasma from Its Source to the Near-Earth Environment" (2014) Solar Physics. 289(10):3799-3816
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Abstract:

Seeking to establish whether active-region upflow material contributes to the slow solar wind, we examine in detail the plasma upflows from Active Region (AR) 10978, which crossed the Sun's disc in the interval 8 to 16 December 2007 during Carrington rotation (CR) 2064. In previous work, using data from the Hinode/EUV Imaging Spectrometer, upflow velocity evolution was extensively studied as the region crossed the disc, while a linear force-free-field magnetic extrapolation was used to confirm aspects of the velocity evolution and to establish the presence of quasi-separatrix layers at the upflow source areas. The plasma properties, temperature, density, and first ionisation potential bias [FIP-bias] were measured with the spectrometer during the disc passage of the active region. Global potential-field source-surface (PFSS) models showed that AR 10978 was completely covered by the closed field of a helmet streamer that is part of the streamer belt. Therefore it is not clear how any of the upflowing AR-associated plasma could reach the source surface at 2.5 R⊙ and contribute to the slow solar wind. However, a detailed examination of solar-wind in-situ data obtained by the Advanced Composition Explorer (ACE) spacecraft at the L1 point shows that increases in O7+/O6+, C6+/C5+, and Fe/O - a FIP-bias proxy - are present before the heliospheric current-sheet crossing. These increases, along with an accompanying reduction in proton velocity and an increase in density are characteristic of both AR and slow-solar-wind plasma. Finally, we describe a two-step reconnection process by which some of the upflowing plasma from the AR might reach the heliosphere. © 2014 The Author(s).

Registro:

Documento: Artículo
Título:Tracking Solar Active Region Outflow Plasma from Its Source to the Near-Earth Environment
Autor:Culhane, J.L.; Brooks, D.H.; van Driel-Gesztelyi, L.; Démoulin, P.; Baker, D.; DeRosa, M.L.; Mandrini, C.H.; Zhao, L.; Zurbuchen, T.H.
Filiación:UCL-Mullard Space Science Laboratory, Holmbury St Mary, United Kingdom
George Mason University, Fairfax, VA, United States
Observatoire de Paris, LESIA, UMR 8109 (CNRS), Paris, France
Konkoly Observatory of the Hungarian Academy of Sciences, Budapest, Hungary
Lockheed Martin Solar and Astrophysics Laboratory, Palo Alto, CA, United States
Instituto de Astronomía y Física del Espacio (IAFE), CONICET-UBA, Buenos Aires, Argentina
UBA, Buenos Aires, Argentina
Dept. of Atmospheric, Oceanic and Earth Sciences, Univ. of Michigan, Ann Arbor, MI, United States
Palabras clave:Active region upflow; Magnetic topology; Slow solar wind contribution
Año:2014
Volumen:289
Número:10
Página de inicio:3799
Página de fin:3816
DOI: http://dx.doi.org/10.1007/s11207-014-0551-5
Título revista:Solar Physics
Título revista abreviado:Sol. Phys.
ISSN:00380938
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00380938_v289_n10_p3799_Culhane

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Citas:

---------- APA ----------
Culhane, J.L., Brooks, D.H., van Driel-Gesztelyi, L., Démoulin, P., Baker, D., DeRosa, M.L., Mandrini, C.H.,..., Zurbuchen, T.H. (2014) . Tracking Solar Active Region Outflow Plasma from Its Source to the Near-Earth Environment. Solar Physics, 289(10), 3799-3816.
http://dx.doi.org/10.1007/s11207-014-0551-5
---------- CHICAGO ----------
Culhane, J.L., Brooks, D.H., van Driel-Gesztelyi, L., Démoulin, P., Baker, D., DeRosa, M.L., et al. "Tracking Solar Active Region Outflow Plasma from Its Source to the Near-Earth Environment" . Solar Physics 289, no. 10 (2014) : 3799-3816.
http://dx.doi.org/10.1007/s11207-014-0551-5
---------- MLA ----------
Culhane, J.L., Brooks, D.H., van Driel-Gesztelyi, L., Démoulin, P., Baker, D., DeRosa, M.L., et al. "Tracking Solar Active Region Outflow Plasma from Its Source to the Near-Earth Environment" . Solar Physics, vol. 289, no. 10, 2014, pp. 3799-3816.
http://dx.doi.org/10.1007/s11207-014-0551-5
---------- VANCOUVER ----------
Culhane, J.L., Brooks, D.H., van Driel-Gesztelyi, L., Démoulin, P., Baker, D., DeRosa, M.L., et al. Tracking Solar Active Region Outflow Plasma from Its Source to the Near-Earth Environment. Sol. Phys. 2014;289(10):3799-3816.
http://dx.doi.org/10.1007/s11207-014-0551-5