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van Driel-Gesztelyi, L.; Culhane, J.L.; Baker, D.; Démoulin, P.; Mandrini, C.H.; DeRosa, M.L.; Rouillard, A.P.; Opitz, A.; Stenborg, G.; Vourlidas, A.; Brooks, D.H. "Magnetic Topology of Active Regions and Coronal Holes: Implications for Coronal Outflows and the Solar Wind" (2012) Solar Physics. 281(1):237-262
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Abstract:

During 2-18 January 2008 a pair of low-latitude opposite-polarity coronal holes (CHs) were observed on the Sun with two active regions (ARs) and the heliospheric plasma sheet located between them. We use the Hinode/EUV Imaging Spectrometer (EIS) to locate AR-related outflows and measure their velocities. Solar-Terrestrial Relations Observatory (STEREO) imaging is also employed, as are the Advanced Composition Explorer (ACE) in-situ observations, to assess the resulting impacts on the solar wind (SW) properties. Magnetic-field extrapolations of the two ARs confirm that AR plasma outflows observed with EIS are co-spatial with quasi-separatrix layer locations, including the separatrix of a null point. Global potential-field source-surface modeling indicates that field lines in the vicinity of the null point extend up to the source surface, enabling a part of the EIS plasma upflows access to the SW. We find that similar upflow properties are also observed within closed-field regions that do not reach the source surface. We conclude that some of plasma upflows observed with EIS remain confined along closed coronal loops, but that a fraction of the plasma may be released into the slow SW. This suggests that ARs bordering coronal holes can contribute to the slow SW. Analyzing the in-situ data, we propose that the type of slow SW present depends on whether the AR is fully or partially enclosed by an overlying streamer. © 2012 Springer Science+Business Media B.V.

Registro:

Documento: Artículo
Título:Magnetic Topology of Active Regions and Coronal Holes: Implications for Coronal Outflows and the Solar Wind
Autor:van Driel-Gesztelyi, L.; Culhane, J.L.; Baker, D.; Démoulin, P.; Mandrini, C.H.; DeRosa, M.L.; Rouillard, A.P.; Opitz, A.; Stenborg, G.; Vourlidas, A.; Brooks, D.H.
Filiación:Mullard Space Science Laboratory, University College London, Dorking, United Kingdom
Observatoire de Paris, LESIA, CNRS, UPMC Univ. Paris 06, Univ. Paris-Diderot, Meudon, France
Konkoly Observatory, Hungarian Academy of Sciences, Budapest, Hungary
International Space Science Institute, Bern, Switzerland
Instituto de Astronomía y Física del Espacio, CONICET-UBA, CC. 67, Suc. 28, 1428 Buenos Aires, Argentina
Facultad de Ciencias Exactas y Naturales, FCEN-UBA, Buenos Aires, Argentina
Lockheed Martin Solar and Astrophysics Laboratory, Palo Alto, CA 94304, United States
Institut de Recherche en Astrophysique et Planétologie, Université de Toulouse (UPS), Toulouse, France
Centre National de la Recherche Scientifique, UMR 5277, Toulouse, France
College of Science, George Mason University, Fairfax, VA 22030, United States
Space Science Division, Naval Research Laboratory, Washington, DC 20375, United States
Palabras clave:Active regions; Magnetic extrapolations; Magnetic field; Solar wind
Año:2012
Volumen:281
Número:1
Página de inicio:237
Página de fin:262
DOI: http://dx.doi.org/10.1007/s11207-012-0076-8
Título revista:Solar Physics
Título revista abreviado:Sol. Phys.
ISSN:00380938
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00380938_v281_n1_p237_vanDrielGesztelyi

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Citas:

---------- APA ----------
van Driel-Gesztelyi, L., Culhane, J.L., Baker, D., Démoulin, P., Mandrini, C.H., DeRosa, M.L., Rouillard, A.P.,..., Brooks, D.H. (2012) . Magnetic Topology of Active Regions and Coronal Holes: Implications for Coronal Outflows and the Solar Wind. Solar Physics, 281(1), 237-262.
http://dx.doi.org/10.1007/s11207-012-0076-8
---------- CHICAGO ----------
van Driel-Gesztelyi, L., Culhane, J.L., Baker, D., Démoulin, P., Mandrini, C.H., DeRosa, M.L., et al. "Magnetic Topology of Active Regions and Coronal Holes: Implications for Coronal Outflows and the Solar Wind" . Solar Physics 281, no. 1 (2012) : 237-262.
http://dx.doi.org/10.1007/s11207-012-0076-8
---------- MLA ----------
van Driel-Gesztelyi, L., Culhane, J.L., Baker, D., Démoulin, P., Mandrini, C.H., DeRosa, M.L., et al. "Magnetic Topology of Active Regions and Coronal Holes: Implications for Coronal Outflows and the Solar Wind" . Solar Physics, vol. 281, no. 1, 2012, pp. 237-262.
http://dx.doi.org/10.1007/s11207-012-0076-8
---------- VANCOUVER ----------
van Driel-Gesztelyi, L., Culhane, J.L., Baker, D., Démoulin, P., Mandrini, C.H., DeRosa, M.L., et al. Magnetic Topology of Active Regions and Coronal Holes: Implications for Coronal Outflows and the Solar Wind. Sol. Phys. 2012;281(1):237-262.
http://dx.doi.org/10.1007/s11207-012-0076-8