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| Titel |
Tracking the magnetic structure of flux ropes from eruption to in-situ detection |
| VerfasserIn |
Erika Palmerio, Emilia Kilpua, Lucie Green, Alexander James, Jens Pomoell, Gherardo Valori |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250122578
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| Publikation (Nr.) |
 EGU/EGU2016-1641.pdf |
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| Zusammenfassung |
| Coronal Mass Ejections (CMEs) are spectacular explosions from the Sun where huge
amounts of plasma and magnetic flux are ejected into the heliosphere. CMEs are built at the
Sun as a force-free (J ×B = 0) magnetic flux rope. It is well-established that CMEs are the
main drivers of intense magnetic storms and various space weather effects at the Earth. One
of the most significant problems for improving the long lead-time space weather predictions
is that there is no method to directly measure the structure of CME magnetic fields, neither in
the onset process nor during the subsequent propagation from the solar surface to
the Earth. The magnetic properties of the CME flux rope (magnetic helicity sign,
the flux rope tilt and the direction of the flux rope axial field) can be estimated
based on the properties of the source active region and characteristics of the related
structures, such as filament details, coronal EUV arcades and X-ray sigmoids. We
present here a study of two CME flux ropes. We compare their magnetic structure
using the synthesis of these indirect proxies based on multi-wavelength remote
sensing observations with the structure detected in-situ near the orbit of the Earth. |
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