Quasilongitudinal approximation for whistler-mode waves in the magnetospheric plasma

Sazhin, S.S.; Horne, Richard B. ORCID: https://orcid.org/0000-0002-0412-6407. 1990 Quasilongitudinal approximation for whistler-mode waves in the magnetospheric plasma. Planetary and Space Science, 38 (12). 1551-1553. 10.1016/0032-0633(90)90160-R

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Official URL: http://dx.doi.org/10.1016/0032-0633(90)90160-R

Abstract/Summary

The range of applicability of an improved quasilongitudinal approximation for whistler-mode waves in the equatorial magnetosphere (4 ≲ L ≲ 6.6) is specified based on the direct comparison between numerical solutions of the hot electromagnetic dispersion equation with the corresponding analytical quasilongitudinal solutions. It is pointed out that this approximation can be used at frequencies ω less than but not close to the electron gyrofrequency Ω (ω ≲ 0.6 Ω) and wave normal angles θ less than but not close to the resonance cone angle θR. At ω = 0.8 Ω the analytical results deviate considerably from numerical ones due to the strong damping of the waves, and so the quasilongitudinal solution becomes no longer valid.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1016/0032-0633(90)90160-R
ISSN:	00320633
Date made live:	05 Sep 2018 01:54 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/520856

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1016/0032-0633(90)90160-R

ISSN:

00320633

Date made live:

05 Sep 2018 01:54 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/520856