Mirror mode storms observed by Solar Orbiter
| Autor: | A. P. Dimmock, E. Yordanova, D. B. Graham, Yu. V. Khotyaintsev, X. Blanco‐Cano, P. Kajdič, T. Karlsson, A. Fedorov, C. J. Owen, E. A. L. E. Werner, A. Johlander |
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| Rok vydání: | 2023 |
| Předmět: |
SHARP
FOS: Physical sciences Space Physics (physics.space-ph) Physics - Plasma Physics Plasma Physics (physics.plasm-ph) Geophysics Astronomi astrofysik och kosmologi Horizon2020 Physics - Space Physics Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astronomy Astrophysics and Cosmology European Union (EU) Solar and Stellar Astrophysics (astro-ph.SR) |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| DOI: | 10.57757/iugg23-0759 |
| Popis: | Mirror modes are a universal plasma process, which has been observed across diverse plasma environments such as planetary magnetospheres, comets, and the solar wind. Their growth is due to free energy from anisotropies in the pressure and they play a pivotal role in constraining the plasma to marginal stability. In this study, Solar Orbiter was used to analyze trains of mirror mode structures in the solar wind and inside solar wind structures across heliocentric distances between 0.5-1 AU. These types of mirror modes are called mirror mode storms and differ from the more isolated, higher amplitude, and larger-scale structures that are more typically observed in these regions. We have investigated several fundamental properties of mirror mode storms: their dependence on heliospheric distance, association with local plasma properties, temporal/spatial scale, amplitude, and connections with larger-scale solar wind transients such as CMEs and SIRs. The main findings are that mirror mode storms can approach local ion scales and deviate from the typically assumed long-wavelength limit. They are frequently observed close to current sheets and on occasion found downstream of interplanetary shocks. The relative occurrence of these events is low and appeared to be observed during moderate-slow solar wind speeds. The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
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