@article{Pal:2022:10.5194/egusphere-egu22-5544,
author = {Pal, S and Kilpua, E and Good, S and Lynch, B and Palmerio, E and Asvestari, E and Pomoell, J and Stevens, M},
doi = {10.5194/egusphere-egu22-5544},
title = {Eruption and Interplanetary Evolution of a Stealth Streamer-blowout CME Observed at ~0.5 AU },
url = {http://dx.doi.org/10.5194/egusphere-egu22-5544},
year = {2022}
}

Download

TY  - JOUR
AB  - <jats:p>&lt;p&gt;The orbit of the Parker Solar Probe (PSP) during the 5th encounter with the Sun presented an opportunity for a multi-observation analysis including the observations of Sun-Earth Connection Coronal and Heliospheric Investigation (SECCHI) coronagraphs and Large Angle and Spectrometric Coronagraph (LASCO) coronagraphs. Streamer-blowout coronal mass ejections (SBO-CMEs) are the dominant CME population during solar minimum. 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 following a multi-stage sympathetic breakout scenario. The suprathermal electron pitch-angle distributions (PADs) and magnetic field observations by PSP suggest that draping of interplanetary magnetic field lines about the CME caused a curvature in the adjacent heliospheric current sheet, initiated magnetic reconnection with the CME flux rope about ~45 hours before it encountered PSP, and eroded ~38% of its initial poloidal magnetic flux at ~0.5 AU. This study covering inner heliospheric observation and analysis of SBO-CME magnetic content provides important implications for the origin of twisted magnetic field lines in SBO-CME flux ropes as the flux rope is not perturbed much by the interplanetary propagation. Also, the multi-spacecraft observations allowed us to estimate the distances where reconnection between the flux rope and its surroundings may be initiated.&amp;#160;&lt;/p&gt;</jats:p>
AU  - Pal,S
AU  - Kilpua,E
AU  - Good,S
AU  - Lynch,B
AU  - Palmerio,E
AU  - Asvestari,E
AU  - Pomoell,J
AU  - Stevens,M
DO  - 10.5194/egusphere-egu22-5544
PY  - 2022///
TI  - Eruption and Interplanetary Evolution of a Stealth Streamer-blowout CME Observed at ~0.5 AU&#160;
UR  - http://dx.doi.org/10.5194/egusphere-egu22-5544
ER  - 

Download