The Relation of Chorus, Hiss and the Plasmasphere

English Abstract:

Recent work has shown strong theoretical support for the association of plasmaspheric hiss and whistler-mode chorus waves. In particular, it was shown that chorus waves originating in the low-density region outside the plasmasphere, are able to propagate away from their equatorial source region to higher latitudes, avoiding the effects of intense Landau damping, and enter into the plasmasphere where they merge into plasmaspheric hiss waves. In this talk, we review the chorus-hiss connection mechanism, and discuss the important role that the plasmasphere plays in this process. We discuss our method of modeling the plasmasphere, and show recent results based on THEMIS and Van Allen Probes data.