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The Eruption of a Magnetic Flux Rope Observed by Solar Orbiter and Parker Solar Probe

Long, David M; Green, Lucie M; Pecora, Francesco; Brooks, David H; Strecker, Hanna; Orozco-Suárez, David; Hayes, Laura A; ... Rüdisser, Hannah T; + view all (2023) The Eruption of a Magnetic Flux Rope Observed by Solar Orbiter and Parker Solar Probe. The Astrophysical Journal , 955 (2) , Article 152. 10.3847/1538-4357/acefd5. Green open access

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Abstract

Magnetic flux ropes are a key component of coronal mass ejections, forming the core of these eruptive phenomena. However, determining whether a flux rope is present prior to eruption onset and, if so, the rope's handedness and the number of turns that any helical field lines make is difficult without magnetic field modeling or in situ detection of the flux rope. We present two distinct observations of plasma flows along a filament channel on 2022 September 4 and 5 made using the Solar Orbiter spacecraft. Each plasma flow exhibited helical motions in a right-handed sense as the plasma moved from the source active region across the solar disk to the quiet Sun, suggesting that the magnetic configuration of the filament channel contains a flux rope with positive chirality and at least one turn. The length and velocity of the plasma flow increased from the first to the second observation, suggesting evolution of the flux rope, with the flux rope subsequently erupting within ∼5 hr of the second plasma flow. The erupting flux rope then passed over the Parker Solar Probe spacecraft during its encounter (13), enabling in situ diagnostics of the structure. Although complex and consistent with the flux rope erupting from underneath the heliospheric current sheet, the in situ measurements support the inference of a right-handed flux rope from remote-sensing observations. These observations provide a unique insight into the eruption and evolution of a magnetic flux rope near the Sun.

Type: Article
Title: The Eruption of a Magnetic Flux Rope Observed by Solar Orbiter and Parker Solar Probe
Open access status: An open access version is available from UCL Discovery
DOI: 10.3847/1538-4357/acefd5
Publisher version: https://doi.org/10.3847/1538-4357/acefd5
Language: English
Additional information: Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence (https://creativecommons.org/licenses/by/4.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/10178072
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