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Abstract:

We demonstrate that study of the evolving magnetic nature of coronal dimming regions can be used to probe the large-scale magnetic structure involved in the eruption of a coronal mass ejection (CME). We analyse the intensity evolution of coronal dimming regions using 195 Å data from the Extreme ultraviolet Imaging Telescope (EIT) on board the Solar and Heliospheric Observatory (SOHO). We measure the magnetic flux, using data from the SOHO/Michelson Doppler Imager (MDI), in the regions that seem most likely to be related to plasma removal. Then, we compare these magnetic flux measurements to the flux in the associated magnetic cloud (MC). Here, we present our analysis of the well-studied event on 12 May 1997 that took place just after solar minimum in a simple magnetic configuration. We present a synthesis of results already published and propose that driven "interchange reconnection" between the expanding CME structure with ''open'' field lines of the northern coronal hole region led to the asymmetric temporal and spatial evolution of the two main dimming regions, associated with this event. As a result of this reconnection process, we find the southern-most dimming region to be the principal foot-point of the MC. The magnetic flux from this dimming region and that of the MC are found to be in close agreement within the same order of magnitude, 10 21 Mx. © Springer Science + Business Media, Inc. 2006.

Registro:

Documento: Artículo
Título:Using the evolution of coronal dimming regions to probe the global magnetic field topology : "Uuunidentical twi"ns: A new interpretation of the 12 May 1997 event
Autor:Attrill, G.; Nakwacki, M.S.; Harra, L.K.; Van Driel-Gesztelyi, L.; Mandrini, C.H.; Dasso, S.; Wang, J.
Filiación:University College London, Mullard Space Science Laboratory, Dorking, Surrey, RH5 6NT, United Kingdom
Instituto de Astronomía y Física del Espacio, CONICET-UBA, CC. 67, Suc. 28, 1428 Buenos Aires, Argentina
Observatoire de Paris, LESIA, FRE 2461 (CNRS), F-92195 Meudon Principal Cedex, France
Konkoly Observatory, Hungarian Academy of Sciences, Budapest, Hungary
Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
National Astronomical Observatory, Chinese Academy of Sciences, Beijing, China
Año:2006
Volumen:238
Número:1
Página de inicio:117
Página de fin:139
DOI: http://dx.doi.org/10.1007/s11207-006-0167-5
Título revista:Solar Physics
Título revista abreviado:Sol. Phys.
ISSN:00380938
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00380938_v238_n1_p117_Attrill

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Citas:

---------- APA ----------
Attrill, G., Nakwacki, M.S., Harra, L.K., Van Driel-Gesztelyi, L., Mandrini, C.H., Dasso, S. & Wang, J. (2006) . Using the evolution of coronal dimming regions to probe the global magnetic field topology : "Uuunidentical twi"ns: A new interpretation of the 12 May 1997 event. Solar Physics, 238(1), 117-139.
http://dx.doi.org/10.1007/s11207-006-0167-5
---------- CHICAGO ----------
Attrill, G., Nakwacki, M.S., Harra, L.K., Van Driel-Gesztelyi, L., Mandrini, C.H., Dasso, S., et al. "Using the evolution of coronal dimming regions to probe the global magnetic field topology : "Uuunidentical twi"ns: A new interpretation of the 12 May 1997 event" . Solar Physics 238, no. 1 (2006) : 117-139.
http://dx.doi.org/10.1007/s11207-006-0167-5
---------- MLA ----------
Attrill, G., Nakwacki, M.S., Harra, L.K., Van Driel-Gesztelyi, L., Mandrini, C.H., Dasso, S., et al. "Using the evolution of coronal dimming regions to probe the global magnetic field topology : "Uuunidentical twi"ns: A new interpretation of the 12 May 1997 event" . Solar Physics, vol. 238, no. 1, 2006, pp. 117-139.
http://dx.doi.org/10.1007/s11207-006-0167-5
---------- VANCOUVER ----------
Attrill, G., Nakwacki, M.S., Harra, L.K., Van Driel-Gesztelyi, L., Mandrini, C.H., Dasso, S., et al. Using the evolution of coronal dimming regions to probe the global magnetic field topology : "Uuunidentical twi"ns: A new interpretation of the 12 May 1997 event. Sol. Phys. 2006;238(1):117-139.
http://dx.doi.org/10.1007/s11207-006-0167-5