Zobrazeno 1 - 10
of 205
pro vyhledávání: '"Fichtner, Horst"'
In the Heliosphere, power-law particle distributions are observed e.g. upstream of interplanetary shocks, which can result from superdiffusive transport. This non-Gaussian transport regime may result from intermittent magnetic field structures. Recen
Externí odkaz:
http://arxiv.org/abs/2408.03638
In this work we define the plasma dispersion function for a suprathermal plasma described with a regularized kappa distribution. As is known from Maxwellian as well as (standard) kappa plasmas, the respective Fried-Conte and the modified plasma dispe
Externí odkaz:
http://arxiv.org/abs/2404.10868
Synthetic turbulence is a relevant tool to study complex astrophysical and space plasma environments inaccessible by direct simulation. However, conventional models lack intermittent coherent structures, which are essential in realistic turbulence. W
Externí odkaz:
http://arxiv.org/abs/2401.10573
The pseudopotential method is used to derive electron hole structures in a suprathermal plasma having a regularized $\kappa$ probability distribution function background. The regularized character allows the exploration of small $\kappa$ values beyon
Externí odkaz:
http://arxiv.org/abs/2310.09081
Autor:
Aerdker, Sophie, Merten, Lukas, Tjus, Julia Becker, Walter, Dominik, Effenberger, Frederic, Fichtner, Horst
Motivated by cosmic ray (CR) re-acceleration at a potential Galactic Wind Termination Shock (GWTS), we present a numerical model for time-dependent Diffusive Shock Acceleration (DSA). We use the stochastic differential equation solver (DiffusionSDE)
Externí odkaz:
http://arxiv.org/abs/2306.10802
Autor:
Fraternale, Federico, Adhikari, Laxman, Fichtner, Horst, Kim, Tae K., Kleimann, Jens, Oughton, Sean, Pogorelov, Nikolai V., Roytershteyn, Vadim, Smith, Charles W., Usmanov, Arcadi V., Zank, G P., Zhao, Lingling
The solar wind (SW) and local interstellar medium (LISM) are turbulent media. Their interaction is governed by complex physical processes and creates heliospheric regions with significantly different properties in terms of particle populations, bulk
Externí odkaz:
http://arxiv.org/abs/2207.14115
Publikováno v:
A&A 664, A132 (2022)
The shape of the ion energy spectra plays a critical role toward determining the ion energetics, the acceleration mechanisms and the possible sources of different plasma and suprathermal ion populations. The determination of the exact shape of the to
Externí odkaz:
http://arxiv.org/abs/2206.01021
Publikováno v:
A&A 663, A67 (2022)
Given their uniqueness, the Ulysses data can still provide us with valuable new clues about the properties of plasma populations in the solar wind, and, especially, about their variations with heliographic coordinates. We revisit the electron data re
Externí odkaz:
http://arxiv.org/abs/2205.05911
Recent studies have outlined the interest for the evaluation of transport coefficients in space plasmas, where the observed velocity distributions of plasma particles are conditioned not only by the binary collisions, e.g., at low energies, but also
Externí odkaz:
http://arxiv.org/abs/2201.05157
We derive an exact, time-dependent analytical magnetic field solution for the inner heliosheath, which satisfies both the induction equation of ideal magnetohydrodynamics in the limit of infinite electric conductivity and the magnetic divergence cons
Externí odkaz:
http://arxiv.org/abs/2110.12893