The auroral O+ non-Maxwellian velocity distribution function revisited
Item
Title (Dublin Core)
The auroral O+ non-Maxwellian velocity distribution function revisited
Description (Dublin Core)
New characteristics of O<sup>+</sup> ion velocity distribution functions in a background of atomic oxygen neutrals subjected to intense external electromagnetic forces are presented. The one dimensional (1-D) distribution function along the magnetic field displays a core-halo shape which can be accurately fitted by a two Maxwellian model. The Maxwellian shape of the 1-D distribution function around a polar angle of 21 ± 1° from the magnetic field direction is confirmed, taking into account the accuracy of the Monte Carlo simulations. For the first time, the transition of the O<sup>+</sup> 1-D distribution function from a core halo shape along the magnetic field direction to the well-known toroidal shape at large polar angles, through the Maxwellian shape at polar angle of 21 ± 1° is properly explained from a generic functional of the velocity moments at order 2 and 4.
Creator (Dublin Core)
Hubert, D.
Leblanc, F.
Date (Dublin Core)
2018-09-27
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.1007/s00585-997-0249-1
https://angeo.copernicus.org/articles/15/249/1997/
Source (Dublin Core)
eISSN: 1432-0576
Language (Dublin Core)
eng
