Abstract
Two envelope soliton events below the H + gyrofrequency with localized density depletion were discovered in low auroral region (∼ 1760 km)by Freja satellite. These events were correlated in time with the observations of the ratio of oxygen ion density to hydrogen ion density sharp increase and the electrons energization. These envelope solitons have a characteristic frequency at ∼ 180–190 Hz, which are obviously different from the electron-ion lower hybrid wave frequency and the helium ion gyrofrequency in low auroral plasma, but it is close to the resonancefrequency of hydrogen ion-oxygen ion hybrid wave. A modulational instability model of an ion-ion hybrid wave has been discussed here. It is found that the envelope soliton below the H + gyrofrequency in low auroral region may be generated by this modulational instability on condition that the local oxygen ion density is larger than the local hydrogen ion density.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Boehm, M.H., Paschmann, G., Clemmons, J., Hoerendel, G., Eliasson, L. and Lundin, R.: 1994, Geophys. Res. Lett. 21, 1895.
Buchsbaum, S.J.: 1960, Phys. Fluids 3, 418.
Chang, T.: 1993, Phys. Fluids B5, 2646.
Dovner, P.O., Eriksson, A.I., Boström, R. and Holback, B.: 1994, Geophys. Res. Lett. 21, 1827.
Eliasson, L.: 1998, Private communication.
Eriksson, A.I., Holback, B., Dovner, P.O., Boström, R., Holmgren, G., André, M., Eliasson, L. and Kintner, P.M.: 1994, Geophys. Res. Lett. 21, 1843.
Erlandson, R.E., Zanetti, L.J., Acu\(\hat n\)a, M.H., Eriksson, A.L., Eliasson, L., Boehm, M.H. and Blomberg, L.G.: 1994, Geophys. Res. Lett. 21, 1855.
Gorbunov, L.M.: 1973, Sov. Phys. Usp., Engl. Transl. 16, 217.
Hasegawa, A.: 1975, Plasma instabilities and nonlinear effects, Springer-Verlag, Press, New York.
Holback, B., Jansson, S.-E., Ahlen, L., Holmgren, G., Lyngdalh, L., Powell, S. and Meyer, A.: 1994, Space Sci. Rev. 70, 577.
Horwitz, J.L., Comfort, R.H., Richards, P.G., Chanler, M.O., Chappell, C.R., Anderson, P., Hanson, W.B. and Brace, L.H.: 1990, J. Geophys. Res. 95, 7949.
Huang, G.L., Wang, D.Y., Le Queau, D. and Holback, B.: 1997, Chinese J. Space Sci. 17, 329.
Lundin, R., Eliasson, L., Haerendel, G., Boehm, M. and Holback, B.: 1994, Geophys. Res. Lett. 21, 1903.
Kintner, P.M., Vago, J., Chesnev, S., Arnoldy, R.L., Lynch, K.L., Pollock, C.J. and Moore, T.E.: 1992, Phys. Rev. Lett. 68, 2448.
Melrose, D.B.: 1986, Instabilities in space and laboratory plasmas, Cambridge Univ. Press, London, p. 216.
Retterer, J.M., Chang, T. and Jasperse, J.R.: 1986, J. Geophys. Res. 91, 1609.
Schmidt, G.: 1979, Physics of high temperature plasmas, Academic Press, London, p. 44.
Smith, R.L. and Brice, N.: 1964, J. Geophys. Res. 69, 5029.
Stasiewicz, K., Gustafsson, G., Holmgren, G., Holback, B., Eliasson, L., Kintner, P.M. and Zanetti, L.: 1994, Geophys. Res. Lett. 21, 1839.
Temerin, M. and Lysak, R.L.: 1984, J. Geophys. Res. 89, 2849.
Vago, J.L., Kintner, P.M., Chesney, S.W., Arnoldy, R.L., Lynch, K.A., Moore, T.E. and Pollock, C.J.: 1992, J. Geophys. Res. 97, 16935.
Wang, D.Y., Huang, G.L. and Fälthammar, C.-G.: 1998, Proceedings of the third Asia Pacific plasma theory conference, Chinese Physics Letters Press, Beijing, p. 242.
Wang, D.Y. and Huang, G.L.: 2001, Chinese Phys. Lett. 18, 553.
Young, D.T., Perraut, S., Roux, A., de Villedary, C., Gendrin, R., Korth, A., Kremser, G. and Jones, D.: 1981, J. Geophys. Res. 86, 6755.
Zakharov, V.E.: 1972, Sov. Phys. JETP, Engl. Transl. 35, 908.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Wang, DY., Huang, GL. & Fälthammar, CG. On the envelope soliton below the H + gyrofrequency in low auroral region. Astrophysics and Space Science 282, 421–432 (2002). https://doi.org/10.1023/A:1020823804941
Issue Date:
DOI: https://doi.org/10.1023/A:1020823804941