edu.ucar.opensky::articles:19616 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T02:35:53.587161 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7mk6fp6 On the parameter dependence of the whistler anisotropy instability 2017-02-01T00:00:00Z publication https://n2t.org/ark:/85065/d7mk6fp6 https://doi.org/10.1002/2017JA023895 An, X. author Yue, Chao author Bortnik, J. author Decyk, V. author Li, W. author Thorne, R. M. author UCAR/NCAR - Library publisher The evolution of the whistler anisotropy instability relevant to whistler-mode chorus waves in the Earth's inner magnetosphere is studied using kinetic simulations and is compared with satellite observations. The electron distribution is constrained by the whistler anisotropy instability to a marginal stability state and presents an upper bound of electron anisotropy, which agrees with satellite observations. The electron beta beta(vertical bar vertical bar e) separates whistler waves into two groups: (i) quasi-parallel whistler waves for beta(vertical bar vertical bar e) greater than or similar to 0.02 and (ii) oblique whistler waves close to the resonance cone for beta(vertical bar vertical bar e) less than or similar to 0.02. Landau damping is important in the saturation and relaxation stage of the oblique whistler wave growth. The saturated magnetic field energy of whistler waves roughly scales with the electron beta beta(2)(vertical bar vertical bar e), shown in both simulations and satellite observations. These results suggest the critical role of electron beta vertical bar vertical bar e in determining the whistler wave properties in the inner magnetosphere. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2017 American Geophysical Union. None eng geoscientificInformation