Abstract
The Cassini radio and plasma wave investigation is designed to study radio emissions, plasma waves, thermal plasma, and dust in the vicinity of Saturn. Plasma particles, waves and fields are the major factors on which present knowledge about Saturn’s magnetosphere is based from the three flyby missions. For the present work, our examination is focused to study those waves who have frequency lower than electron cyclotron frequency in Saturnian magnetosphere. In this paper, we investigate the growth rate of whistler mode waves in magneto-plasma of Saturn. A dispersion relation for parallel propagating whistler mode waves has been applied to the magnetosphere of Saturn. The effect of electron density, temperature anisotropy, number density and A.C frequency on the temporal growth rate of the whistler mode emission is studied. For the given magnetic field and external electric field configuration, the general dispersion relation has been derived.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Akalin, F., Gurnett, D.A., Averamo, T.F., Persson, A.M., Santolik, O., Kurth, W.S., Hospodarsky, G.B.: First whistler observed in the magnetosphere of Saturn. Geophys. Res. Lett. 33, L20107 (2006)
Dory, R.A., Guest, G.E., Harris, E.G.: Unstable electrostatic plasma waves propagating perpendicular to a magnetic field. Phys. Rev. Lett. 14, 131 (1965)
Fried, B.D., Conte, S.D.: The Plasma Dispersion Function. Academic Press, San Diego (1961)
Gurnett, D.A., Kurth, W.S., Scarf, F.L.: Plasma waves near Saturn: initial results from Voyager 1. Science 212, 235–239 (1981a)
Gurnett, D.A., Kurth, W.S., Scarf, F.L.: Narrowband electromagnetic emissions from Saturn’s magnetosphere. Nature 292, 733 (1981b)
Gurnett, D.A., et al.: Radio and plasma wave observations at Saturn from Cassini’s approach and first orbit. Science 307, 1255–1259 (2005)
Kumari, J., Pandey, R.S.: Study of VLF wave with relativistic effect in Saturn magnetosphere in the presence of parallel A.C. electric field. Adv. Space Res. (2018). https://doi.org/10.1016/j.asr.2018.12.013
Lindqvist, P.A., Mozer, F.S.: The average tangential electric field at the noon magnetopause. J. Geophys. Res. 95(17), 137 (1990)
Mace, R.L.: Whistler instability enhanced by suprathermal electrons within the Earth’s foreshock. J. Geophys. Res. 103, 14643–14654 (1998)
Misra, K.D., Haile, T.: Effect of AC electric field on the whistler mode instability in the magnetosphere. J. Geophys. Res. 98, 9297 (1993)
Misra, K.D., Singh, B.D.: Electric field induced instability in the magnetosphere. J. Geophys. Res. 82, 2267 (1977)
Misra, K.D., Singh, B.D.: On the modifications of the whistler mode instability in the magnetosphere in the presence of a parallel electric field by cold plasma injection. J. Geophys. Res. 85, 5138 (1980)
Misra, K.D., Singh, B.D., Mishra, S.P.: Effect of a parallel electric field on the whistler mode instability in the magnetosphere. J. Geophys. Res. 84, 5923 (1979)
Mozer, F.S., Torbert, R.B., Fahleson, U.V., Falthammar, C., Gonfalone, A., Pederson, A., Russel, C.T.: Electric field measurements in the solar wind bow shock, magnetosheath, magnetopause, and magnetosphere. Space Sci. Rev. 22, 794 (1978)
Sazhin, S.S.: Oblique whistler mode growth and damping in a hot anisotropic plasma. Planet. Space Sci. 36, 663–667 (1988)
Scarf, F.L., Gurnett, D.A., Kurth, W.S.: Jupiter plasma wave observations: an initial Voyager 1 overview. Science 204, 991–995 (1979)
Scarf, F.L., Gurnett, D.A., Kurth, W.S., et al.: Voyager 2 plasma wave observations at Saturn. Science 215, 587–594 (1982)
Sittler, E.C. Jr., Ogilvie, K.W., Scudder, J.D.: Survey of low energy plasma electrons in Saturn’s magnetosphere: Voyagers 1 and 2. J. Geophys. Res. 88, 8847–8870 (1983)
Summers, D., Thorne, R.M.: The modified plasma dispersion function. Phys. Fluids B 3, 1835–1847 (1991)
Thomsen, M.F., Reisenfeld, D.B., Delapp, D.M., Tokar, R.L., Young, D.T., Crary, F.J., Sittler, E.C., McGraw, M.A., Williams, J.D.: Survey of ion plasma parameters in Saturn’s magnetosphere. J. Geophys. Res. 115, A10220 (2010)
Thorne, R.M., Smith, E.J., Burton, R.K., Holzer, R.E.: Plasmaspheric hiss. J. Geophys. Res. 78(10), 1581–1596 (1973). https://doi.org/10.1029/JA078i010p01581
Wygant, J.R., Bensadoun, M., Mozer, F.S.: Electric field measurements at sub-critical, oblique bow shock crossings. J. Geophys. Res. 92(11), 109 (1987)
Young, D.T., Young, D.T., Berthelier, J.J., Blanc, M., et al.: Composition and dynamics of plasma in Saturn’s magnetosphere. Science 307, 1262–1265 (2005)
Acknowledgements
The authors are grateful to the Chairman, Indian Space Research Organisation (ISRO), Director and members of PLANEX program, ISRO, for the financial support. We are thankful to Dr. Ashok K. Chauhan (Founder President, Amity University), Dr. Atul Chauhan (President, Amity University) and Dr. Balvinder Shukla (Vice Chancellor, Amity University) for their immense encouragement. We also express our gratitude to the reviewers for their expert comments for the manuscript.
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher’s Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Annex, E.H., Pandey, R.S. Generation of oblique electromagnetic wave by hot injection electron beam with parallel AC electric field in the magnetosphere of Saturn. Astrophys Space Sci 364, 81 (2019). https://doi.org/10.1007/s10509-019-3566-4
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s10509-019-3566-4