Magnetic field-aligned plasma currents in gravitational fields
نویسندگان
چکیده
منابع مشابه
Magnetic field-aligned plasma currents in gravitational fields
Analytical models are presented for currents along vertical magnetic field lines due to slow bulk electron motion in plasmas subject to a gravitational force. It is demonstrated that a general feature of this problem is a singularity in the plasma pressure force that develops at some finite altitude when a plasma that is initially in static equilibrium is set into slow motion. Classical fluid m...
متن کاملIonospheric currents and field-aligned currents generated by dynamo action in an asymmetric Earth magnetic field
[1] To investigate the influence of the magnetic field configuration on large-scale ionospheric electrodynamics, a geomagnetic field coordinate system based on Euler potentials is built for three magnetic field configurations: dipole, tilted dipole, and a revision of the International Geomagnetic Reference Field (IGRF). The two-dimensional ionospheric dynamo equation is expressed in this framew...
متن کاملIncluding gap region field‐aligned currents and magnetospheric currents in the MHD calculation of ground‐based magnetic field perturbations
[1] Many high‐latitude modeling studies utilize the horizontal ionospheric Hall current in calculating ground‐based magnetic perturbations, but low‐latitude and midlatitude studies should include current systems such as the magnetospheric, field‐aligned, and Pedersen currents. Recently, by including all these current systems, a more precise ground‐ based perturbation calculator has been impleme...
متن کاملField - aligned currents during IMF 0
We report on field-aligned currents (FAC) obtained from precise magnetic field measurements made onboard the Orsted and Magsat satellites when the interplanetary magnetic field (IMF) was near zero. We found that Region 1/Region 2 currents persist through southward IMF, IMF -• 0, and northward IMF; also the central area of both the northern and southern polar caps is always filled with FACs, eve...
متن کاملAuroral field-aligned currents by incoherent scatter plasma line observations in the E region
The aim of the Swedish-Japanese EISCAT campaign in February 1999 was to measure the ionospheric parameters inside and outside the auroral arcs. The ion line radar experiment was optimised to probe the E-region and lower F-region with as high a speed as possible. Two extra channels were used for the plasma line measurements covering the same altitudes, giving a total of 3 upshifted and 3 downshi...
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: Annales Geophysicae
سال: 2015
ISSN: 1432-0576
DOI: 10.5194/angeo-33-257-2015