Observation of a Magnetic Switchback in the Solar Corona

0561335 - ASÚ 2023 RIV US eng J - Článek v odborném periodiku
Telloni, D. - Zank, G.P. - Stangalini, M. - Heinzel, Petr … celkem 61 autorů
Observation of a Magnetic Switchback in the Solar Corona.
Astrophysical Journal Letters. Roč. 936, č. 2 (2022), č. článku L25. ISSN 2041-8205. E-ISSN 2041-8213
Institucionální podpora: RVO:67985815
Klíčová slova: solar corona * solar magnetic reconnection * solar magnetic fields
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 7.9, rok: 2022
Způsob publikování: Open access

Switchbacks are sudden, large radial deflections of the solar wind magnetic field, widely revealed in interplanetary space by the Parker Solar Probe. The switchbacks' formation mechanism and sources are still unresolved, although candidate mechanisms include Alfvenic turbulence, shear-driven Kelvin-Helmholtz instabilities, interchange reconnection, and geometrical effects related to the Parker spiral. This Letter presents observations from the Metis coronagraph on board a Solar Orbiter of a single large propagating S-shaped vortex, interpreted as the first evidence of a switchback in the solar corona. It originated above an active region with the related loop system bounded by open-field regions to the east and west. Observations, modeling, and theory provide strong arguments in favor of the interchange reconnection origin of switchbacks. Metis measurements suggest that the initiation of the switchback may also be an indicator of the origin of slow solar wind.
Trvalý link: https://hdl.handle.net/11104/0334230