Naslov
Evidence of a complex structure within the 2013 August 19 CME. ICME radial and longitudinal evolution in the heliosphere

Autori
Rodriguez-Garcia, Laura ; Nieves-Chinchilla, Teresa ; Gomez- Herrero, Raul ; Zouganelis, Yannis ; Dumbovic, Mateja ; Balmaceda, Laura ; Jian, Lan ; Mays, M. ; Carcaboso-Morales, Fernando ; Guedes dos Santos, Luiz Fernando ; Rodriguez-Pacheco, Javier

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
AGU Fall Meeting 2021

Mjesto i datum
New Orleans (LA), Sjedinjene Američke Države, 13.12.2021. - 17.12.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
coronal mass ejections, flux rope, multispacecraft observation

Sažetak
Context: Late on 2013 August 19, a coronal mass ejection (CME) erupting from an active region located near the far-side central meridian from Earth's perspective was remotely observed by STEREO-A, STEREO-B and SOHO spacecraft. The CME consisted of two consecutive eruptions from the same active region. The interplanetary (IP) counter part of the CME, hence IP CME (ICME) was observed by MESSENGER, located near 0.3 au, and STEREO-A and STEREO-B, near 1 au, which were separated 78 degrees in longitude. Aims: The main objective of this study is to follow the radial and longitudinal evolution of the ICME throughout the heliosphere, and to discuss the possible scenarios for the different flux-rope signatures observed on the solar disk and at the locations of MESSENGER and STEREO-A, separated by 15 degrees in heliolongitude. Methods: Remote-sensing observations are used to determine the "flux-rope type" and the GCS model is used to reconstruct the flux-rope in the corona. The analysis of in situ data, namely, plasma and magnetic field data, is compared to the Drag-Based Model (DBM) and ENLIL model. The elliptic-cylindrical analytical flux-rope model (EC model) is used for the flux-rope reconstruction. Results: The different flux- rope signatures observed at MESSENGER and STEREO-A locations might be due to the spacecraft observing different parts of a complex flux-rope magnetic topology. The IP shock may have suffered distortion in its evolution in the heliosphere, such that the IP shock east flank overtakes the west flank at 1 au.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA