Wave properties in the magnetic reconnection diffusion region with high Beta: Application of the k-filtering method to Cluster multispacecraft data - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Geophysical Research Space Physics Année : 2010

Wave properties in the magnetic reconnection diffusion region with high Beta: Application of the k-filtering method to Cluster multispacecraft data

S. Y. Huang
  • Fonction : Auteur
M. Zhou
Fouad Sahraoui
X. H. Deng
  • Fonction : Auteur
Y. Pang
  • Fonction : Auteur
Z. G. Yuan
  • Fonction : Auteur
Q. Wei
  • Fonction : Auteur
J. F. Wang
  • Fonction : Auteur
X. M. Zhou
  • Fonction : Auteur

Résumé

Magnetic reconnection is a crucial physical process in laboratory and astrophysical plasmas. Plasma waves are believed to provide the dissipation mechanism in magnetic reconnection. In this paper we analyze the properties of low-frequency waves in a magnetotail reconnection diffusion region with a small guide field and high β. Using the k-filtering method on the magnetic field data measured by Cluster spacecraft, we found that low-frequency waves in the diffusion region were highly oblique propagating mode. We compared the measured dispersion relation with theoretical ones calculated using the linear (hot) two-fluid and Vlasov-Maxwell theory. It is found that the observed waves in the diffusion region (with high plasma β) follow the dispersion relation of the Alfvén-Whistler wave mode. Comparisons with previous simulations and observational results are also discussed.

Dates et versions

hal-01553787 , version 1 (03-07-2017)

Identifiants

Citer

S. Y. Huang, M. Zhou, Fouad Sahraoui, X. H. Deng, Y. Pang, et al.. Wave properties in the magnetic reconnection diffusion region with high Beta: Application of the k-filtering method to Cluster multispacecraft data. Journal of Geophysical Research Space Physics, 2010, 115 (A12), pp.12211. ⟨10.1029/2010JA015335⟩. ⟨hal-01553787⟩
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