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- SH33E-2557: Langmuir-Wave Excitation in Magnetic Holes: A New Multi-Scale Model Supported by Solar Orbiter Observations
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Board 2557‚ Hall EFG (Poster Hall)NOLA CC
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Jingting Liu, University College London (First Author, Presenting Author)
Daniel Verscharen, University College London
Jesse Coburn, University College London
Georgios Nicolaou, University College London
Xiangyu Wu, University College London
Wence Jiang, NSSC National Space Science Center, CAS
Oreste Pezzi, ISTP-CNR
Francesco Pucci, ISTP-CNR
Matteo Zuin, Consorzio RFX
Christopher Owen, University College London
Hamish Reid, University College London
Magnetic holes are regions in space where the magnetic field suddenly drops and the surrounding plasma becomes denser. These features are often found in the solar wind. Recent observations have found that Langmuir waves frequently occur inside these magnetic holes. In this study, we present a new model that explains how these waves can form. The model is based on the motion of electrons when they pass through regions of changing magnetic field strength. We show that inside magnetic holes, the electrons’ motion is disturbed in a way that triggers Langmuir wave generation. Our observations from the Solar Orbiter mission match our model predictions, showing that magnetic holes can induce Langmuir waves in the solar wind. This work helps explain how inhomogeneous magnetic field in space can drive wave activity through a process that couples effects on large and small scales.
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