Space–time structure and wavevector anisotropy in space plasma turbulence
نویسندگان
چکیده
منابع مشابه
Space–time structure and wavevector anisotropy in space plasma turbulence
Space and astrophysical plasmas often develop into a turbulent state and exhibit nearly random and stochastic motions. While earlier studies emphasize more on understanding the energy spectrum of turbulence in the one-dimensional context (either in the frequency or the wavenumber domain), recent achievements in plasma turbulence studies provide an increasing amount of evidence that plasma turbu...
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A relationship between power anisotropy and wavevector anisotropy in turbulent fluctuations is derived. This can be used to interpret plasma turbulence measurements, for example in the solar wind. If fluctuations are anisotropic in shape then the ion gyroscale break point in spectra in the directions parallel and perpendicular to the magnetic field would not occur at the same frequency, and sim...
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Most existing cosmological entanglement studies are focused on the isotropic Robertson-Walker (RW) spacetime. Here we go beyond this limitation and study the influence of anisotropy on entanglement generated by dynamical spacetime. Since the isotropic spacetime is viewed as a background medium and the anisotropy is incorporated as perturbation, we decompose entanglement entropy into isotropic a...
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1 Space Research Institute, Austrian Academy of Sciences, Graz, Austria 2 Institut für Geophysik und extraterrestrische Physik, Technische Universität Braunschweig, Braunschweig, Germany 3 Institut für Theoretische Physik, Technische Universität Braunschweig, Braunschweig, Germany 4 Institute for Space Sciences, Bucharest-Măgurele, Romania 5 Institut für Planetenforschung, Deutsches Zentrum für...
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Two parametrizations for second order velocity moments, the Batchelor parametrization for the r-space structure function and a common parametrization for the energy spectrum, E(p) ∝ p exp(−p/pd), are examined and compared. In particular, we investigate corrections to the local scaling exponents induced by finite size effects. The behavior of local r– and p–space exponents differs dramatically. ...
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ژورنال
عنوان ژورنال: Living Reviews in Solar Physics
سال: 2018
ISSN: 2367-3648,1614-4961
DOI: 10.1007/s41116-017-0010-0