caa a22 4500 386368023 CHVBK 20180307111943.0 cr unu---uuuuu 161130e198904 xx s 000 0 eng 10.1017/S0022377800013945 doi S0022377800013945 pii (NATIONALLICENCE)cambridge-10.1017/S0022377800013945 Rossby-type electrostatic electron plasma waves [Elektronische Daten] This paper explores the properties of Rossby-type electrostatic electron plasma waves at frequencies very much less than the electron gyrofrequency but very much greater than the ion gyrofrequency. Such waves represent the electron counterpart of ion Rossby waves, which propagate at frequencies very much less than the ion gyrofrequency in a plasma in which the ambient magnetic field possesses a spatial gradient perpendicular to its line of action. This feature simulates the ‘β-effect' that operates in the classical atmospheric Rossby wave: the wave dynamics associated with both ion and electron Rossby waves are structurally similar to those associated with wave perturbations in a rotating fluid, where the β-effect arises from a spatial gradient in the Coriolis acceleration. It is shown that this plasma β-effect gives rise to a ‘new' mode of the Rossby type, and in addition considerably modifies the conical wave propagation properties characteristic of the electron cyclotron mode. The highly dispersive and anisotropic nature of these waves is described in terms of the topology of the wavenumber surfaces concomitant with plane-wave solutions of the wave equation for the system as a whole. Copyright © Cambridge University Press 1989 McKenzie J. F. Department of Mathematics and Applied Mathematics, University of Natal, King George V Avenue, Durban, Natal 4001, South Africa Naidu K. Department of Mathematics and Applied Mathematics, University of Natal, King George V Avenue, Durban, Natal 4001, South Africa Journal of Plasma Physics Cambridge University Press 41/2(1989-04), 395-404 0022-3778 41:2<395 1989 41 PLA https://doi.org/10.1017/S0022377800013945 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022377800013945 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- McKenzie J. F. Department of Mathematics and Applied Mathematics, University of Natal, King George V Avenue, Durban, Natal 4001, South Africa NATIONALLICENCE 700 1- Naidu K. Department of Mathematics and Applied Mathematics, University of Natal, King George V Avenue, Durban, Natal 4001, South Africa NATIONALLICENCE 773 0- Journal of Plasma Physics Cambridge University Press 41/2(1989-04), 395-404 0022-3778 41:2<395 1989 41 PLA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge