IWF/ÖAW
Main task Understanding fundamental processes in space plasmas: shock waves,
turbulence, reconnection Applications in Sun, heliosphere, and magnetospheres
Main research topics
1. Space-time structure of shocks and turbulence Theoretical model construction Comparison with multi-point observations
2. Waves and reconnection Wave mode identification Condition and mechanism of reconnection
Refereed publications (since Jan 2013) Total: 15 (first author: 7)
Educational activities (since Jan 2013) Lecturing at TU Braunschweig, teaching at Ilia University (Georgia)
Space Plasma Physics: Heliosphere
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IWF/ÖAW
Lead: Yasuhito Narita
Members
Staff: P. Bourdin, N. Dwivedi, C. Möstl, Z. Vörös, T. Zaqarashvili
PhD Student: T. Rollett
Cooperation within IWF
Magnetospheric dynamics (Nakamura et al.)
Heliospheric dynamics (Lammer et al.)
MMS high-frequency magnetometer data (Magnes et al.)
Solar Orbiter wave data (Steller et al.)
Key international collaboration
Germany: TU Braunschweig; Italy: INAF-IAPS Rome; Romania: ISS Bucharest; Spain: UIB; USA: Johns-Hopkins University
Who are we?
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IWF/ÖAW
CME-CME interaction
Double-CME event in July 2012
Imaging and in-situ observation
Lesson for extreme events
CME-shape and trajectory
Global shape of shocks and flux ropes
Self-Similar Expansion model
Multi-point imaging
CME prediction
Evolution scenario of CME
Prediction of CME hit on the Earth
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Shock Waves
Liu et al. (2014)
Davies et al. (2013)
IWF/ÖAW
Space-time structure
Analytic treatment of Navier-Stokes eq.
Wavenumber-frequency spectrum
Doppler shift and broadening
Breakdown of Taylor's frozen-in flow hypothesis
Impact on solar wind turbulence research
Error estimate for Kolmogorov constant
Collaboration with Johns-Hopkins Univ.
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Turbulence Theory
Narita (2014)
Wilczek et al. (2014)
IWF/ÖAW
Solar wind as a natural turbulence laboratory
Wave mode identification
Combination: Observation, simulation, and analytic theory
First-time evidence for ion Bernstein wave in the solar wind
Collaboration with TU Braunschweig
Wave Picture of Turbulence
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Narita (2014)Comisel et al. (2013)Perschke et al. (2013)
Cluster observation Numerical simulation Analytic theory
IWF/ÖAW
Current sheet thickness
Fitting with the Harris-type sheet
Capon's inverse method for Cluster data
Collaboration with Nakamura et al.
Turbulent-reconnection hypothesis
Dispersive wave triggering
Whistlers and kinetic Alfvén waves
Large-scale simulation (MHD and ion-scale)
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Current Sheet and Reconnection
Narita et al. (2013)
IWF/ÖAW
Filament formation
Isotropy restoration in high-beta limit
Confirmation by ion PIC simulation
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Structure Formation
Zaqarashvili et al. (2014)
Cluster observationNumerical simulation
Narita et al. (2014)
Flux-tube formation
Twisted tube model construction
Comparison with spacecraft data
IWF/ÖAW
MMS Mission (2015+)
Turbulent-reconnection hypothesis
Heating mechanism in turbulence
Particle acceleration mechanism
Large-scale simulation (fluid to particle scale)
Reconnection simulation
Turbulence simulation
Sun and heliosphere
CME modeling and impacts on planets
Solar wind turbulence
Corona heating
Solar Orbiter (2017+)
Future: 2015-2018
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IWF/ÖAW
Thank you
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