| Автор | Huang, T. S. |
| Автор | Hill, T. W. |
| Дата выпуска | 1989 |
| dc.description | We modify the Jovian ionosphere‐magnetosphere coupling model presented by Hill (1979) to include rotational slippage of the neutral atmosphere at ionospheric heights, relative to a frame of reference corotating rigidly with Jupiter. In the modified model, as altitude increases, the drift velocities of neutrals and ions relative to the corotating frame increase from zero at the bottom of the ionosphere to their respective maximum values at the top, and the corotation lag of the magnetosphere is enhanced for a given rate of mass loading of the magnetosphere. The height variations of the drift velocities of neutrals and ions in the ionosphere and the enhancement factor for the corotation lag of the magnetosphere are related to the atmospheric eddy diffusion coefficient at ionospheric heights. On the basis of ionospheric properties deduced from measurements of Pioneer 11, Voyager 1, and Voyager 2, we derive height profiles of ion and neutral drift speed for various possible values of the eddy diffusion coefficient. If we accept the ion injection rate from Io (10<sup>29</sup> ions/s) and the ion transport rate through the Jovian magnetosphere (3×10<sup>28</sup> ions/s), corresponding to the observed values of the corotation lag of the Io torus (δω<sub>I</sub> = 0.04ω<sub>J</sub>) and the critical distance for magnetospheric corotation (L<sub>o</sub> = 20), respectively, the effective ionospheric conductance is reduced by a factor of the order of 10, resulting in an enhanced corotation lag, for a given rate of mass loading, by the same factor compared to earlier models. The eddy diffusion coefficient in the high‐latitude ionosphere is inferred to be ∼10<sup>13</sup> n<sub>n</sub><sup>−1/2</sup> m<sup>1/2</sup>/s, or about a factor of 20 larger than the value inferred from Voyager measurements at near‐equatorial latitudes. |
| Формат | application.pdf |
| Копирайт | Copyright 1989 by the American Geophysical Union. |
| Тема | IONOSPHERE |
| Тема | Ionosphere/magnetosphere interactions |
| Тема | Ionosphere/magnetosphere interactions |
| Тема | MAGNETOSPHERIC PHYSICS |
| Тема | Planetary magnetospheres |
| Тема | Magnetosphere/ionosphere interactions |
| Тема | Magnetosphere/ionosphere interactions |
| Тема | PLANETARY SCIENCES: SOLID SURFACE PLANETS |
| Тема | Magnetospheres |
| Тема | PLANETARY SCIENCES: FLUID PLANETS |
| Тема | Magnetospheres |
| Тема | PLANETARY SCIENCES: COMETS AND SMALL BODIES |
| Тема | Magnetospheres |
| Название | Corotation lag of the Jovian atmosphere, ionosphere, and magnetosphere |
| Тип | shortCommunication |
| DOI | 10.1029/JA094iA04p03761 |
| Electronic ISSN | 2156-2202 |
| Print ISSN | 0148-0227 |
| Журнал | Journal of Geophysical Research: Space Physics |
| Том | 94 |
| Первая страница | 3761 |
| Последняя страница | 3765 |
| Выпуск | A4 |
| Библиографическая ссылка | Atreya, S. K., Atmospheres and Ionospheres of the Outer Planets and Their Satellites, Springer‐Verlag, New York, 1986. |
| Библиографическая ссылка | Atreya, S. K., T. M.Donahue, M. C.Festou, Jupiter: Structure and composition of the upper atmosphere, Astrophys. J., 247, L43, 1981. |
| Библиографическая ссылка | Brown, R. A., Observed departure of the Io plasma torus from rigid corotation with Jupiter, Astrophys. J., 268, L47, 1983. |
| Библиографическая ссылка | Brown, R. A., C. B.Pilcher, D. F.Strobel, Spectrophotometric studies of the Io torus, Physics of the Jovian MagnetosphereA. J.Dessler, 197, Cambridge University Press, New York, 1983. |
| Библиографическая ссылка | Chen, R. H., Studies of Jupiter's lower ionospheric layers, J. Geophys. Res., 86, 7792, 1981. |
| Библиографическая ссылка | Coroniti, F. V., Energetic electrons in Jupiter's magnetosphere, Astrophys. J. Suppl., 27, 261, 1974. |
| Библиографическая ссылка | Dessler, A. J., Mass‐injection rate from Io into the Io plasma torus, Icarus, 44, 291, 1980. |
| Библиографическая ссылка | Eviatar, A., J. D.Richardson, Corotation of the Kronian magnetosphere, J. Geophys. Res., 91, 3299, 1986. |
| Библиографическая ссылка | Fjeldbo, G., A.Kliore, B.Seidel, D.Sweetnam, D.Cain, The Pioneer 10 radio occultation measurement of the ionosphere of Jupiter, Astrophys. J., 39, 91, 1975. |
| Библиографическая ссылка | Hill, T. W., Inertial limit on corotation, J. Geophys. Res., 84, 6554, 1979. |
| Библиографическая ссылка | Hill, T. W., Corotation lag in Jupiter's magnetosphere: Comparison of observation and theory, Science, 207, 301, 1980. |
| Библиографическая ссылка | Hill, T. W., A. J.Dessler, C. K.Goertz, Magnetospheric models, Physics of the Jovian MagnetosphereA. J.Dessler, 353, Cambridge University Press, New York, 1983. |
| Библиографическая ссылка | Hines, C. O., On the rotation of the polar ionospheric regions, J. Geophys. Res., 65, 141, 1960. |
| Библиографическая ссылка | Kaiser, M. L., M. D.Desch, Narrow‐band Jovian kilometric radiation, Geophys. Res. Lett., 7, 61, 1980. |
| Библиографическая ссылка | Kennel, C. F., F. V.Coroniti, Is Jupiter's magnetosphere like a pulsar's or Earth's?, Space Sci. Rev., 17, 957, 1975. |
| Библиографическая ссылка | Kennel, C. F., F. V.Coroniti, Jupiter's magnetosphere, Ann. Rev. Astron. Astrophys., 15, 389, 1977. |
| Библиографическая ссылка | McNuttJr., R. L., J. W.Belcher, J. D.Sullivan, F.Bagenal, H. S.Bridge, Departure from rigid corotation of plasma in Jupiter's dayside magnetosphere, Nature, 280, 803, 1979. |
| Библиографическая ссылка | Pilcher, C. B., J. H.Fertel, J. S.Morgan, [SII] images of the Io torus, Astrophys. J., 291, 377, 1985. |
| Библиографическая ссылка | PontiusJr., D. H., T. W.Hill, Departure from corotation of the Io plasma torus: Local plasma production, Geophys. Res. Lett., 9, 1321, 1982. |
| Библиографическая ссылка | Roesler, F. L., F.Scherb, R. J.Oliversen, Periodic intensity variation in [SIII] 9531 Å emission from the Jupiter plasma torus, Geophys. Res. Lett., 11, 128, 1984. |
| Библиографическая ссылка | Strobel, D. F., S. K.Atreya, Ionosphere, Physics of the Jovian MagnetosphereA. J.Dessler, 51, Cambridge University Press, New York, 1983. |
| Библиографическая ссылка | Vasyliunas, V. M., Plasma distribution and flow, Physics of the Jovian MagnetosphereA. J.Dessler, 395, Cambridge University Press, New York, 1983. |
