Bonn 2020 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 3: Poster session
EP 3.11: Poster
Dienstag, 31. März 2020, 16:30–18:30, Zelt
Identifying and Quantifying the Role of Magnetic Reconection in Space Plasma Turbulence — •Jeffersson Agudelo1, Daniel Verscharen1, Robert Wicks1, Christopher Owen1, Andrew Walsh2, Yannis Zouganelis2, and Santiago Vargas3 — 1University College London, Department of Space and Climate Physics Mullard Space Science Laboratory — 2European Space Agency, European Space Astronomy Centre — 3Universidad Nacional de Colombia, Observatorio Astronómico Nacional
One of the outstanding open questions in space plasma physics is the heating problem in the solar corona and the solar wind. In-situ measurements, as well as MHD and kinetic simulations, suggest a relation between the turbulent nature of plasma and the onset of magnetic reconnection as a channel of energy dissipation, particle acceleration and a heating mechanism. Non-linear interactions between counter propagating Alfven waves drives plasma towards a turbulent state. On the other hand, the interactions between particles and waves becomes stronger at scales near the ion gyroradious, and so turbulence can enhance conditions for reconnection and increase the number of reconnection sites. We use fully kinetic particle in cell simulations, to study the onset of reconnection in a 3D simulation box with parameters similar to the solar wind, under alfvenic turbulence. We characteristic features of reconnection sites as steep gradients of the magnetic field strength, formation of strong current sheets and inflow-outflow patters of plasma particles near the difusion regions. These results will be used to quantify the role of reconnection in plasma turbulence.