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Main Authors:	Chen, Li-Jen, Gershman, Daniel, Burkholder, Brandon, Chen, Yuxi, Sarantos, Menelaos, Jian, Lan, Drake, James, Dong, Chuanfei, Gurram, Harsha, Shuster, Jason, Graham, Daniel, Contel, Olivier Le, Schwartz, Steven, Fuselier, Stephen, Madanian, Hadi, Pollock, Craig, Liang, Haoming, Argall, Matthew, Denton, Richard, Rice, Rachel, Beedle, Jason, Genestreti, Kevin, Ardakani, Akhtar, Stanier, Adam, Le, Ari, Ng, Jonathan, Bessho, Naoki, Pandya, Megha, Wilder, Frederick, Gabrieles, Christine, Cohen, Ian, Wei, Hanying, Russell, Christopher T., Ergun, Robert, Torbert, Roy, Burch, James
格式:	Preprint
出版:	2024
主題:	Space Physics Earth and Planetary Astrophysics Solar and Stellar Astrophysics
在線閱讀:	https://arxiv.org/abs/2402.08091
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書本目錄:

We report a rare regime of Earth's magnetosphere interaction with sub-Alfvénic solar wind in which the windsock-like magnetosphere transforms into one with Alfvén wings. In the magnetic cloud of a Coronal Mass Ejection (CME) on April 24, 2023, NASA's Magnetospheric Multiscale mission distinguishes the following features: (1) unshocked and accelerated cold CME plasma coming directly against Earth's dayside magnetosphere; (2) dynamical wing filaments representing new channels of magnetic connection between the magnetosphere and foot points of the Sun's erupted flux rope; (3) cold CME ions observed with energized counter-streaming electrons, evidence of CME plasma captured due to reconnection between magnetic-cloud and Alfvén-wing field lines. The reported measurements advance our knowledge of CME interaction with planetary magnetospheres, and open new opportunities to understand how sub-Alfvénic plasma flows impact astrophysical bodies such as Mercury, moons of Jupiter, and exoplanets close to their host stars.

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