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

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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 ultr...

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Autores principales: Attrill, G., Nakwacki, M.S., Harra, L.K., Van Driel-Gesztelyi, L., Mandrini, C.H., Dasso, S., Wang, J.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00380938_v238_n1_p117_Attrill
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00380938_v238_n1_p117_Attrill2023-10-03T14:48:36Z 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 Attrill, G. Nakwacki, M.S. Harra, L.K. Van Driel-Gesztelyi, L. Mandrini, C.H. Dasso, S. Wang, J. 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. Fil:Nakwacki, M.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mandrini, C.H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Dasso, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00380938_v238_n1_p117_Attrill
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description 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.
format JOUR
author Attrill, G.
Nakwacki, M.S.
Harra, L.K.
Van Driel-Gesztelyi, L.
Mandrini, C.H.
Dasso, S.
Wang, J.
spellingShingle Attrill, G.
Nakwacki, M.S.
Harra, L.K.
Van Driel-Gesztelyi, L.
Mandrini, C.H.
Dasso, S.
Wang, J.
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
author_facet Attrill, G.
Nakwacki, M.S.
Harra, L.K.
Van Driel-Gesztelyi, L.
Mandrini, C.H.
Dasso, S.
Wang, J.
author_sort Attrill, G.
title 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
title_short 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
title_full 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
title_fullStr 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
title_full_unstemmed 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
title_sort 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
url http://hdl.handle.net/20.500.12110/paper_00380938_v238_n1_p117_Attrill
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