Magnetic Structure and Propagation of Two Interacting CMEs From the Sun to Saturn

Show full item record



Permalink

http://hdl.handle.net/10138/337249

Citation

Palmerio , E , Nieves-Chinchilla , T , Kilpua , E K J , Barnes , D , Zhukov , A N , Jian , L K , Witasse , O , Provan , G , Tao , C , Lamy , L , Bradley , T J , Mays , M L , Moestl , C , Roussos , E , Futaana , Y , Masters , A & Sanchez-Cano , B 2021 , ' Magnetic Structure and Propagation of Two Interacting CMEs From the Sun to Saturn ' , Journal of geophysical research. Space physics , vol. 126 , no. 11 , ARTN e2021JA029770 . https://doi.org/10.1029/2021JA029770

Title: Magnetic Structure and Propagation of Two Interacting CMEs From the Sun to Saturn
Author: Palmerio, Erika; Nieves-Chinchilla, Teresa; Kilpua, Emilia K. J.; Barnes, David; Zhukov, Andrei N.; Jian, Lan K.; Witasse, Olivier; Provan, Gabrielle; Tao, Chihiro; Lamy, Laurent; Bradley, Thomas J.; Mays, M. Leila; Moestl, Christian; Roussos, Elias; Futaana, Yoshifumi; Masters, Adam; Sanchez-Cano, Beatriz
Contributor organization: Department of Physics
Space Physics Research Group
Date: 2021-11
Language: eng
Number of pages: 28
Belongs to series: Journal of geophysical research. Space physics
ISSN: 2169-9380
DOI: https://doi.org/10.1029/2021JA029770
URI: http://hdl.handle.net/10138/337249
Abstract: One of the grand challenges in heliophysics is the characterization of coronal mass ejection (CME) magnetic structure and evolution from eruption at the Sun through heliospheric propagation. At present, the main difficulties are related to the lack of direct measurements of the coronal magnetic fields and the lack of 3D in-situ measurements of the CME body in interplanetary space. Nevertheless, the evolution of a CME magnetic structure can be followed using a combination of multi-point remote-sensing observations and multi-spacecraft in-situ measurements as well as modeling. Accordingly, we present in this work the analysis of two CMEs that erupted from the Sun on April 28, 2012. We follow their eruption and early evolution using remote-sensing data, finding indications of CME-CME interaction, and then analyze their interplanetary counterpart(s) using in-situ measurements at Venus, Earth, and Saturn. We observe a seemingly single flux rope at all locations, but find possible signatures of interaction at Earth, where high-cadence plasma data are available. Reconstructions of the in-situ flux ropes provide almost identical results at Venus and Earth but show greater discrepancies at Saturn, suggesting that the CME was highly distorted and/or that further interaction with nearby solar wind structures took place before 10 AU. This work highlights the difficulties in connecting structures from the Sun to the outer heliosphere and demonstrates the importance of multi-spacecraft studies to achieve a deeper understanding of the magnetic configuration of CMEs.
Subject: coronal mass ejections
heliophysics
solar wind
interplanetary magnetic field
heliosphere
CORONAL MASS EJECTIONS
COSMIC-RAY INTENSITY
SOLAR ENERGETIC PARTICLES
KILOMETRIC RADIATION
INTERACTION REGIONS
STREAM INTERACTIONS
FORBUSH DECREASES
COMPLEX EJECTA
HIGH-LATITUDES
WHITE-LIGHT
114 Physical sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


Files in this item

Total number of downloads: Loading...

Files Size Format View
2021JA029770.pdf 12.76Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record