Results 21 to 30 of about 150,813 (163)

Kappa-like distribution functions inside magnetic clouds

Geofísica Internacional, 2008
En este trabajo estamos interesados en el estudio de la temperatura y el perfil de las colas supratermales de los electrones en nubes magnéticas. Para ello hemos modelado las funciones de distribución de velocidades de los electrones como superposición ...
T. Nieves-Chinchilla, A. F. Viñas
doaj   +1 more source

Effects of a kappa distribution function of electrons on incoherent scatter spectra [PDF]

Annales Geophysicae, 2000
In usual incoherent scatter data analysis, the plasma distribution function is assumed to be Maxwellian. In space plasmas, however, distribution functions with a high energy tail which can be well modeled by a generalized Lorentzian distribution ...
S. Saito, F. R. E. Forme, S. C. Buchert, S. Nozawa, R. Fujii   +4 more
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Field-aligned conductance values estimated from Maxwellian and kappa distributions in quiet and disturbed events using Freja electron data [PDF]

Annales Geophysicae, 1998
We study the question of what difference it makes for the derived field-aligned conductance (K) values if one uses Maxwellian or kappa distributions for the fitting of low-orbiting satellite electron flux spectra in the auroral region.
A. Olsson, P. Janhunen, P. Janhunen
doaj   +1 more source

Kappa Distributions: Theory and Applications in Space Plasmas [PDF]

Solar Physics, 2010
At the time of submission to arxiv this paper is under consideration of editors for publication in a review journal.
Pierrard, V., Lazar, M.
openaire   +2 more sources

A Comparative Study of the Proton Properties of Magnetospheric Substorms at Earth and Mercury in the Near Magnetotail

Geophysical Research Letters, 2018
The variations of plasma sheet proton properties during magnetospheric substorms at Earth and Mercury are comparatively studied. This study utilizes kappa distributions to interpret proton properties at both planets.
W. J. Sun, J. A. Slavin, R. M. Dewey, J. M. Raines, S. Y. Fu, Y. Wei, T. Karlsson, G. K. Poh, X. Jia, D. J. Gershman, Q. G. Zong, W. X. Wan, Q. Q. Shi, Z. Y. Pu, D. Zhao   +14 more
doaj   +1 more source

Transport coefficients in standard Kappa distributed plasmas: a comparative study [PDF]

Annales Geophysicae
This study systematically derives transport coefficients – electrical conductivity, thermoelectric, diffusion, and mobility – for a Lorentz plasma described by a standard Kappa distribution function.
M. J. Jwailes, I. A. Barghouthi, Q. S. Atawnah   +2 more
doaj   +1 more source

Transport Equation of Kappa Distributions in the Heliosphere

The Astrophysical Journal, 2023
Abstract In this paper, we develop the transport equation of kappa, the fundamental thermodynamic parameter that labels kappa distributions of particle velocities. Using the recently developed concept of entropy defect, we are able to formulate the transport equation of kappa as a function of a general, positive or negative, rate of ...
G. Livadiotis, D. J. McComas
openaire   +2 more sources

The collisional relaxation rate of kappa-distributed plasma with multiple components

AIP Advances, 2018
The kappa-distributed fully ionized plasma with collisional interaction is investigated. The Fokker-Planck equation with Rosenbluth potential is employed to describe such a physical system. The results show that the kappa distribution is not a stationary
Ran Guo
doaj   +1 more source

Non-Thermal Solar Wind Electron Velocity Distribution Function

Entropy
The quiet-time solar wind electrons feature non-thermal characteristics when viewed from the perspective of their velocity distribution functions. They typically have an appearance of being composed of a denser thermal “core” population plus a tenuous ...
Peter H. Yoon, Rodrigo A. López, Chadi S. Salem, John W. Bonnell, Sunjung Kim   +4 more
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Universality of kappa distributions

Europhysics Letters
Abstract This paper reveals the universality of the particle energy distribution function, despite the arbitrariness that characterizes the generalized thermodynamic entropic function. We show that the canonical distribution, that is, the distribution function that maximizes this entropy under the constraints of canonical ensemble, is ...
George Livadiotis, David J. McComas
openaire   +1 more source