Non-Maxwellian ion velocity distributions observed using EISCAT
نویسندگان
چکیده
منابع مشابه
Non-maxwellian Ion Velocity Distributions Observed Using Eiscat
Recent observations from the EISCAT neutral thermal speed. However, for larger incoherent scatter radar have revealed bursts of drifts the distribution function is predicted to poleward ion flow in the dayside auroral ionosbe highly non-Maxwellian and takes the form of a phere which are consistent with the ionospheric torus in velocity space (symmetric about the signature of flux transfer event...
متن کاملA statistical study of ion frictional heating observed by EISCAT
Results of a statistical survey of F-region ion frictional heating are presented, a survey which is based on over 4000 h of common programme observations taken by the European incoherent scatter (EISCAT) UHF radar facility. The criterion adopted in this study for the identi®cation of ion frictional heating was that de®ned by McCrea et al., requiring an enhancement in the F-region ®eld-parallel ...
متن کاملNon-maxwellian Velocity Distribution Functions Associated with Steep Temperature Gradients
Non-Maxwellian electron velocity distribution functions, computed for Dupree's 1972 model of the solar transition region in a previous paper, are used to calculate ionization rates for ions of carbon, nitrogen, and oxygen. Ionization equilibrium populations for these ions are then computed and compared with similar calculations assuming Maxwellian distribution functions for the electrons. The r...
متن کاملThe auroral O non-Maxwellian velocity distribution function revisited
New characteristics of O 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 pola...
متن کاملNon-Maxwellian electron distributions in clusters of galaxies
Context. Thermal X-ray spectra of clusters of galaxies and other sources are commonly calculated assuming Maxwellian electron distributions. There are situations where this approximation is not valid, for instance near interfaces of hot and cold gas and near shocks. Aims. The presence of non-thermal electrons affects the X-ray spectrum. To study the role of these electrons in clusters and other...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 1987
ISSN: 0094-8276
DOI: 10.1029/gl014i002p00111