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  The Angular Size of Coronal Mass Ejections: STEREO Measurements and Consequences for Future Missions

Lugaz, N., Zhuang, B., Scolini, C., Lee, C., Al-Haddad, N., Möstl, C., Farrugia, C., Winslow, R., Lillis, R., Galvin, A. (2023): The Angular Size of Coronal Mass Ejections: STEREO Measurements and Consequences for Future Missions, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4582

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020992 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020992_1
Genre: Conference Paper

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 Creators:
Lugaz, Noé1, Author
Zhuang, Bin1, Author
Scolini, Camilla1, Author
Lee, Christina1, Author
Al-Haddad, Nada1, Author
Möstl, Christian1, Author
Farrugia, Charles1, Author
Winslow, Réka1, Author
Lillis, Robert1, Author
Galvin, Antoinette1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: Coronal mass ejections are observed remotely by coronagraphs with angular widths, for the "flux rope", of 60-90 deg. Past studies from single events measured by two spacecraft at the same heliocentric distance or statistical studies of events measured by two spacecraft at different distances have revealed that the angular width of CME magnetic ejecta may be 40-60 deg near 1 AU. Here, we present a more in-depth analysis of CME measurements by STEREO-A and Wind in 2020-2022 when the two spacecraft separation decreased from 60 to 20 deg. We find that multi-spacecraft measurements are rare, even for two spacecraft at 1 AU separated by 25-30 deg. We discuss how this affects future mission concepts and how it reveals that dedicated multi-spacecraft missions with spacecraft separations of 20 degrees or less are needed to advance our understanding of CMEs.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-4582
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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