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Annales Geophysicae 23, 12 (2005) 3715-3725

Electron-scale sheets of whistlers close to the magnetopause

G. Stenberg 1, T. Oscarsson 1, M. André 2, A. Vaivads 2, M. Morooka 2, N. Cornilleau-Wehrlin 3, A. Fazakerley 4, B. Lavraud 5, P. M. E. Décréau 6

(2005-12-23)

Whistler emissions close to the magnetopause on the magnetospheric side are investigated using the four Cluster spacecraft. The waves are found to be generated in thin (electron-scale) sheets moving with the plasma drift velocity. A feature in the electron data coincides with the waves; hot magnetospheric electrons disappear for a few satellite spins. This produces or enhances a temperature anisotropy, which is found to be responsible for the generation of the whistler mode waves. The high energy electrons are thought to be lost through the magnetopause and we suggest that the field lines, on which the waves are generated, are directly connected to a reconnection diffusion region at the magnetopause.

1:	Department of Physics
	Department of Physics
2:	Swedish Institute of Space Physics
	Swedish Institute of Space Physics
3:	Centre d'étude des environnements terrestre et planétaires (CETP)
	CNRS : UMR8639 – INSU – Université de Versailles Saint-Quentin-en-Yvelines
4:	MSSL
	MSSL
5:	Centre d'étude spatiale des rayonnements (CESR)
	CNRS : UMR5187 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III
6:	Laboratoire de physique et chimie de l'environnement (LPCE)
	CNRS : UMR6115 – INSU – Université d'Orléans

Subject

:

Sciences of the Universe/Ocean, Atmosphere Sciences of the Universe/Earth Sciences

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Submitted on: Friday, 23 December 2005 08:00:00

Updated on: Tuesday, 14 October 2008 09:33:06