Eruption and Interplanetary Evolution of a Stealthy Streamer-Blowout CME Observed by PSP at ${sim}$0.5~AU. (arXiv:2205.07713v1 [astro-ph.SR])

Eruption and Interplanetary Evolution of a Stealthy Streamer-Blowout CME Observed by PSP at ${sim}$0.5~AU. (arXiv:2205.07713v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Pal_S/0/1/0/all/0/1">Sanchita Pal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lynch_B/0/1/0/all/0/1">Benjamin J. Lynch</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Good_S/0/1/0/all/0/1">Simon W. Good</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Palmerio_E/0/1/0/all/0/1">Erika Palmerio</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Asvestari_E/0/1/0/all/0/1">Eleanna Asvestari</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pomoell_J/0/1/0/all/0/1">Jens Pomoell</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Stevens_M/0/1/0/all/0/1">Michael L. Stevens</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kilpua_E/0/1/0/all/0/1">Emilia K. J. Kilpua</a>

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 $18 , pm ,
11%$ of the CME’s azimuthal magnetic flux has been eroded through magnetic
reconnection and that this erosion began after a heliospheric distance of
${sim}0.35$ 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.

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 $18 , pm ,
11%$ of the CME’s azimuthal magnetic flux has been eroded through magnetic
reconnection and that this erosion began after a heliospheric distance of
${sim}0.35$ 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.

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