Coronal mass ejection speeds measured in the solar corona using LASCO C2 and C3 images

In this work we present height-time diagrams of 2 halo coronal mass ejections, observed on September 28th, 1997 and June 29th, 1999. The CMEs were observed by the Large Angle and Spectroscopic Coronagraph (LASCO), which observes the solar corona from 2 to 32 solar radii. To obtain these diagrams we...

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Autores principales: Dal Lago, A., Schwenn, R., Stenborg, G., Gonzalez, W.D.
Formato: JOUR
Materias:
Acceleration
Solar energy
Coronal mass ejections (CME)
solar corona
Space research
corona
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02731177_v32_n12_p2619_DalLago
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_02731177_v32_n12_p2619_DalLago
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spelling todo:paper_02731177_v32_n12_p2619_DalLago2023-10-03T15:15:32Z Coronal mass ejection speeds measured in the solar corona using LASCO C2 and C3 images Dal Lago, A. Schwenn, R. Stenborg, G. Gonzalez, W.D. Acceleration Solar energy Coronal mass ejections (CME) solar corona Space research corona In this work we present height-time diagrams of 2 halo coronal mass ejections, observed on September 28th, 1997 and June 29th, 1999. The CMEs were observed by the Large Angle and Spectroscopic Coronagraph (LASCO), which observes the solar corona from 2 to 32 solar radii. To obtain these diagrams we divide the LASCO images of a given sequence in angular slices, transform them into rectangular slices (their width chosen proportional to the time distance to the next image) and place them side by side. Thus, the speed profile of any pattern moving in the particular latitudinal slice can be derived. With this method we were able to identify even minor speed changes in several angular positions for the chosen events. This technique is particularly appropriate to identify acceleration or deceleration of structures in halo CMEs. © 2003 COSPAR. Published by Elsevier Ltd. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02731177_v32_n12_p2619_DalLago
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Acceleration
Solar energy
Coronal mass ejections (CME)
solar corona
Space research
corona
spellingShingle Acceleration
Solar energy
Coronal mass ejections (CME)
solar corona
Space research
corona
Dal Lago, A.
Schwenn, R.
Stenborg, G.
Gonzalez, W.D.
Coronal mass ejection speeds measured in the solar corona using LASCO C2 and C3 images
topic_facet Acceleration
Solar energy
Coronal mass ejections (CME)
solar corona
Space research
corona
description In this work we present height-time diagrams of 2 halo coronal mass ejections, observed on September 28th, 1997 and June 29th, 1999. The CMEs were observed by the Large Angle and Spectroscopic Coronagraph (LASCO), which observes the solar corona from 2 to 32 solar radii. To obtain these diagrams we divide the LASCO images of a given sequence in angular slices, transform them into rectangular slices (their width chosen proportional to the time distance to the next image) and place them side by side. Thus, the speed profile of any pattern moving in the particular latitudinal slice can be derived. With this method we were able to identify even minor speed changes in several angular positions for the chosen events. This technique is particularly appropriate to identify acceleration or deceleration of structures in halo CMEs. © 2003 COSPAR. Published by Elsevier Ltd. All rights reserved.
format JOUR
author Dal Lago, A.
Schwenn, R.
Stenborg, G.
Gonzalez, W.D.
author_facet Dal Lago, A.
Schwenn, R.
Stenborg, G.
Gonzalez, W.D.
author_sort Dal Lago, A.
title Coronal mass ejection speeds measured in the solar corona using LASCO C2 and C3 images
title_short Coronal mass ejection speeds measured in the solar corona using LASCO C2 and C3 images
title_full Coronal mass ejection speeds measured in the solar corona using LASCO C2 and C3 images
title_fullStr Coronal mass ejection speeds measured in the solar corona using LASCO C2 and C3 images
title_full_unstemmed Coronal mass ejection speeds measured in the solar corona using LASCO C2 and C3 images
title_sort coronal mass ejection speeds measured in the solar corona using lasco c2 and c3 images
url http://hdl.handle.net/20.500.12110/paper_02731177_v32_n12_p2619_DalLago
work_keys_str_mv AT dallagoa coronalmassejectionspeedsmeasuredinthesolarcoronausinglascoc2andc3images
AT schwennr coronalmassejectionspeedsmeasuredinthesolarcoronausinglascoc2andc3images
AT stenborgg coronalmassejectionspeedsmeasuredinthesolarcoronausinglascoc2andc3images
AT gonzalezwd coronalmassejectionspeedsmeasuredinthesolarcoronausinglascoc2andc3images
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