Eruption and Interplanetary Evolution of a Stealthy Streamer-Blowout CME Observed by PSP at ∼0.5 AU

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Pal , S , Lynch , B J , Good , S W , Palmerio , E , Asvestari , E , Pomoell , J , Stevens , M L & Kilpua , E K J 2022 , ' Eruption and Interplanetary Evolution of a Stealthy Streamer-Blowout CME Observed by PSP at ∼0.5 AU ' , Frontiers in Astronomy and Space Sciences , vol. 9 , 903676 . https://doi.org/10.3389/fspas.2022.903676

Title: Eruption and Interplanetary Evolution of a Stealthy Streamer-Blowout CME Observed by PSP at ∼0.5 AU
Author: Pal, Sanchita; Lynch, Benjamin J.; Good, Simon W.; Palmerio, Erika; Asvestari, Eleanna; Pomoell, Jens; Stevens, Michael L.; Kilpua, Emilia K. J.
Contributor organization: Space Physics Research Group
Particle Physics and Astrophysics
Department of Physics
Date: 2022-05-31
Language: eng
Number of pages: 14
Belongs to series: Frontiers in Astronomy and Space Sciences
ISSN: 2296-987X
DOI: https://doi.org/10.3389/fspas.2022.903676
URI: http://hdl.handle.net/10138/346183
Abstract: Streamer-blowout coronal mass ejections (SBO-CMEs) are the dominant CME population during solar minimum. Although they are typically slow and lack clear low-coronal signatures, they can cause geomagnetic storms. With the aid of extrapolated coronal fields and remote observations of the off-limb low corona, we study the initiation of an SBO-CME preceded by consecutive CME eruptions consistent with a multi-stage sympathetic breakout scenario. From inner-heliospheric Parker Solar Probe (PSP) observations, it is evident that the SBO-CME is interacting with the heliospheric magnetic field and plasma sheet structures draped about the CME flux rope. We estimate that 18 +/- 11% of the CME's azimuthal magnetic flux has been eroded through magnetic reconnection and that this erosion began after a heliospheric distance of similar to 0.35 AU from the Sun was reached. This observational study has important implications for understanding the initiation of SBO-CMEs and their interaction with the heliospheric surroundings.
Subject: 115 Astronomy, Space science
114 Physical sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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