Blog

26.11. 2015

Data Integration

Data Integration
In the space physics community, progress is constantly being made both with new, more detailed spacecraft observations and statistical investigations of spacecraft data, and in parallel, advances within computer simulations continuously give more detailed insights into the physical processes and the time evolution of various phenomena, which enhance our understanding of the  important physics. Although both of these disciplines play an important part in the scientific progress, comparative studies between observations and simulation are a key component in order to make sense of both the data and the simulations. Such work, in particular studies which concern kinetic effects, are highly relevant for the work conducted within the SHOCK project. Here below is a selection of four recent papers which together highlight the relevance of simulation-observation comparisons, and the scientific gains that may come from such studies.
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05.11. 2015

Turbulence vs kinetic instabilities

Turbulence vs kinetic instabilities
Two dimensional expanding box hybrid simulations clearly demonstrate
that kinetic instabilities may coexist with strong plasma turbulence and bound the plasma parameter space.
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12.10. 2015

Recovering features of the observed solar wind spectra by means of high-resolution hybrid simulations

Recovering features of the observed solar wind spectra by means of high-resolution hybrid simulations
High-resolution two-dimensional hybrid simulations of turbulence with an out-of-plane ambient magnetic field are able to simultaneously reproduce several aspects of observed solar wind spectra over a large range of scales, from the MHD to the sub-ion kinetic range.
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14.01. 2015

The imprints of expansion on solar wind turbulence

The imprints of expansion on solar wind turbulence
Numerical simulations show that solar wind expansion affects the evolution of turbulence in the heliosphere, causing the emergence of strong transverse magnetic fields and of radial velocity jets.
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15.12. 2014

Electron heat flux in the solar wind: Data vs. Simulations

Electron heat flux in the solar wind: Data vs. Simulations
Numerical simulations, which include the effects of binary collisions, are able to reproduce qualitatively and quantitatively the electron heat flux in the solar wind observed at 1 AU.
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30.06. 2014

Particle-in-Cell Simulations of Magnetic Reconnection in Collisionless Force-Free Current Sheets

Magnetic reconnection is one of the most fundamental physical processes in plasmas. It is especially important for activity processes in space and astrophysical plasmas. We investigate magnetic reconnection in collisionless plasmas, focussing on current sheet configurations for which the current density is parallel to the magnetic field, i.e. force-free current sheets.
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22.05. 2014

Proton and alpha particle thermal energetics in the solar wind

Proton and alpha particle thermal energetics in the solar wind
Numerical simulations indicate that proton and alpha particle thermal energetics in the solar wind are importantly influenced by kinetic instabilities.
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06.05. 2014

The role of binary collisions in the electron properties of the solar wind

The role of binary collisions in the electron properties of the solar wind
Numerical simulations show that the effect of the radial expansion and the binary collisions between electrons play a significant role in shaping the observed velocity distribution function.
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28.03. 2013

MHD Simulations of the Hermean Magnetosphere

MHD Simulations of the Hermean Magnetosphere
Simulation of the interaction of the solar wind with the Hermean magnetosphere using the AMRVAC-MHD code.
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23.04. 2012

Reconnection in Space Plasmas

The storage and release of magnetic energy is fundamental for many activity processes in solar system and astrophysical plasmas. When magnetic energy is released the magnetic field lines often reconfigure in a process which scientists call magnetic reconnection.
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