Автор |
Daly, R. A. |
Автор |
Hughes, W. J. |
Дата выпуска |
1985 |
dc.description |
We show that hydromagnetic wave electric fields could cause the fluctuations in cold plasma number density that have been observed as spacecraft cross the plasmapause. To explore the effects of a hydromagnetic wave electric field on the particles in the vicinity of the plasmapause we constructed a simple computer model of the flow of cold plasma in the equatorial plane of the magnetosphere. A hydromagnetic wave electric field which is localized in space and time is introduced. Particles are perturbed by the wave electric field. The resulting fluctuations in cold plasma number density are most evident in the dusk region and occur over both large (∼1 R<sub>E</sub>) and small (∼0.1 R<sub>E</sub>) distance scales. As these variations in the number density are similar to those observed, hydromagnetic wave electric fields could very well account for the density variations observed in the vicinity of the plasmapause boundary. |
Формат |
application.pdf |
Копирайт |
Copyright 1985 by the American Geophysical Union. |
Тема |
INTERPLANETARY PHYSICS |
Тема |
vMHD waves and turbulence |
Тема |
IONOSPHERE |
Тема |
Plasma convection |
Тема |
MAGNETOSPHERIC PHYSICS |
Тема |
MHD waves and instabilities |
Тема |
Plasma convection |
Тема |
Plasmasphere |
Тема |
PLANETARY SCIENCES: COMETS AND SMALL BODIES |
Тема |
Plasma and MHD instabilities |
Тема |
SPACE PLASMA PHYSICS |
Тема |
MHD waves and instabilities |
Название |
The effect of hydromagnetic waves on the shape of the plasmapause boundary |
Тип |
shortCommunication |
DOI |
10.1029/JA090iA01p00537 |
Electronic ISSN |
2156-2202 |
Print ISSN |
0148-0227 |
Журнал |
Journal of Geophysical Research: Space Physics |
Том |
90 |
Первая страница |
537 |
Последняя страница |
542 |
Выпуск |
A1 |
Библиографическая ссылка |
Anderson, R. R., ISEE 1 electron number density survey in the inner magnetosphere, (abstract), Eos Trans. AGU, 64, 809, 1983. |
Библиографическая ссылка |
Carpenter, D. L., Whistler evidence of a “knee” in the magnetospheric ionization density profile, J. Geophys. Res., 68, 1675, 1963. |
Библиографическая ссылка |
Carpenter, D. L., Whistler studies of the plasmapause in the magnetosphere, J. Geophys. Res., 7, 693, 1966. |
Библиографическая ссылка |
Chappell, C. R., K. K.Harris, G. W.Sharp, The morphology of the bulge region of the plasmasphere, J. Geophys. Res., 75, 3848, 1970. |
Библиографическая ссылка |
Chen, A. J., R. A.Wolf, Effects on the plasmasphere of a timevarying convection electric field, Planet. Space Sci., 20, 483, 1972. |
Библиографическая ссылка |
Cummings, W. D., S. E.DeForest, R. L.McPherron, Measurements of the Poynting vector of standing hydromagnetic waves at geosynchronous orbit, J. Geophys. Res., 83, 697, 1978. |
Библиографическая ссылка |
Grebowski, J. M., Model studies of plasmapause motion, J. Geophys. Res., 75, 4329, 1970. |
Библиографическая ссылка |
Higbie, P. R., D. N.Baker, R. D.Zwickl, R. D.Belian, J. R.Asbridge, J. F.Fennell, B.Wilken, C. W.Arthur, The global pc 5 event of November 14–15, 1979, J. Geophys. Res., 87, 2337, 1982. |
Библиографическая ссылка |
Hughes, W. J., R. L.McPherron, J. N.Barfield, Geomagnetic pulsations observed simultaneously on three geostationary satellites, J. Geophys. Res., 83, 1109, 1978. |
Библиографическая ссылка |
Jaggi, R. K., R. A.Wolf, Self‐consistant calculation of the motion of a sheet of ions in the magnetosphere, J. Geophys. Res., 78, 2842, 1973. |
Библиографическая ссылка |
Junginger, H., G.Geiger, G.Haerendel, F.Melzner, E.Amata, B.Higel, A statistical study of dayside magnetospheric electric field fluctuations with periods between 150 and 600 s, J. Geophys. Res., 89, 5495, 1984. |
Библиографическая ссылка |
Kikuchi, H., H. A.TaylorJr., Irregular structure of thermal ion plasma near the plasmapause observed from OGO 3 and pc 1 measurements, J. Geophys. Res., 77, 131, 1972. |
Библиографическая ссылка |
Kremser, G., A.Korth, J. A.Fejer, B.Wilken, A. V.Gurevich, E.Amata, Observations of quasi‐periodic flux variations of energetic ions and electrons associated with pc 5 geomagnetic pulsations, J. Geophys. Res., 86, 3345, 1981. |
Библиографическая ссылка |
Lanzerotti, L. J., D. J.Southwood, Hydromagnetic waves, Solar System Plasma PhysicsE. N.Parker, C. F.Kennel, L. J.Lanzerotti, 109, North‐Holland, Amsterdam, 1979. |
Библиографическая ссылка |
Maynard, N. C., A. J.Chen, Isolated cold plasma regions: Observations and their relation to possible production mechanisms, J. Geophys. Res., 80, 1009, 1975. |
Библиографическая ссылка |
Nishida, A., Formation of the plasmapause, or magnetospheric knee, by the combined action of magnetospheric convection and plasma escape from the tail, J. Geophys. Res., 71, 5669, 1966. |
Библиографическая ссылка |
Southwood, D. J., Some features of field line resonances in the magnetosphere, Planet. Space Sci., 22, 483, 1974. |
Библиографическая ссылка |
Southwood, D. J., W. J.Hughes, Theory of hydromagnetic waves in the magnetosphere, Space Sci. Rev., 35, 301, 1983. |
Библиографическая ссылка |
Spiro, R. W., M.Harel, R. A.Wolf, P. H.Reiff, Quantitative simulation of a magnetospheric substorm, 3, Plasmaspheric electric fields and the evolution of the plasmapause, J. Geophys. Res., 86, 2261, 1981. |
Библиографическая ссылка |
Takahashi, K., R. L.McPherron, Harmonic structure of pc 3–4 pulsations, J. Geophys. Res., 87, 1504, 1982. |
Библиографическая ссылка |
Taylor, H. A., H. C.Brinton, A. R.Deshmukh, Observations of irregular structure in thermal ion distributions in the duskside magnetosphere, J. Geophys. Res., 75, 2481, 1970. |
Библиографическая ссылка |
Vasyliunas, V. M., Mathematical models of magnetospheric convection and its coupling to the ionosphere, Particles and Fields in the MagnetosphereB. M.McCormac, 29, D. Reidel, Hingham, Mass., 1970. |