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Quantifying the Propagation of Fast Coronal Mass Ejections from the Sun to Interplanetary Space by Combining Remote Sensing and Multi-point In Situ Observations
Zhao, XW;   Liu, YD;   Hu, HD;   Wang, R
Department空间科学部
Source PublicationASTROPHYSICAL JOURNAL
2019
Volume822Issue:2Pages:122
DOI10.3847/1538-4357/ad379b
ISSN0004-637X
KeywordSolar-wind White-light Radio Kinematics Evolution Cme Temperature Ulysses Shocks
Abstract

In order to have a comprehensive view of the propagation and evolution of coronal mass ejections (CMEs) from the Sun to deep interplanetary space beyond 1 au, we carry out a kinematic analysis of seven CMEs in solar cycle 23. The events are required to have coordinated coronagraph observations, interplanetary type II radio bursts, and multi-point in situ measurements at the Earth and Ulysses. A graduated cylindrical shell model, an analytical model without free parameters, and a magnetohydrodynamic model are used to derive CME kinematics near the Sun, to quantify the CME/shock propagation in theSun-Earth space, and to connect in situ signatures at the Earth and Ulysses, respectively. We find that each of the seven CME-driven shocks experienced a major deceleration before reaching 1 au and thereafter propagated with a gradual deceleration from the Earth to larger distances. The resulting CME/shock propagation profile for each case is roughly consistent with all the data, which verifies the usefulness of the simple analytical model for CME/shock propagation in the heliosphere. The statistical analysis of CME kinematics indicates a tendency that the faster the CME, the larger the deceleration, and theshorter the deceleration time period within 1 au. For several of these events, the associated geomagnetic storms were mainly caused by the southward magnetic fields in the sheath region. In particular, the interaction between a CME-driven shock and a preceding ejecta significantly enhanced the pre-existing southward magnetic fields and gave rise to a severe complex geomagnetic storm.

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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7084
Collection空间科学部
Recommended Citation
GB/T 7714
Zhao, XW; Liu, YD; Hu, HD; Wang, R. Quantifying the Propagation of Fast Coronal Mass Ejections from the Sun to Interplanetary Space by Combining Remote Sensing and Multi-point In Situ Observations[J]. ASTROPHYSICAL JOURNAL,2019,822(2):122.
APA Zhao, XW; Liu, YD; Hu, HD; Wang, R.(2019).Quantifying the Propagation of Fast Coronal Mass Ejections from the Sun to Interplanetary Space by Combining Remote Sensing and Multi-point In Situ Observations.ASTROPHYSICAL JOURNAL,822(2),122.
MLA Zhao, XW; Liu, YD; Hu, HD; Wang, R."Quantifying the Propagation of Fast Coronal Mass Ejections from the Sun to Interplanetary Space by Combining Remote Sensing and Multi-point In Situ Observations".ASTROPHYSICAL JOURNAL 822.2(2019):122.
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