Slow mode waves and mirror instability in gyrotropic Hall magnetohydrodynamic model

L. N. Hau, B. J. Wang, Teh Wai Leong

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Recently the nonlinear magnetohydrodynamic (MHD) model corrected by pressure anisotropy and Hall current arising from the ion inertia is applied to construct slow or mirror mode structures and compare with the observation in the Earth's magnetosphere [K. Stasiewicz, Phys. Rev. Lett. 93, 125004 (2004)]. A serious issue is also raised of whether the Hall MHD model is appropriate for describing the high beta plasma and is capable of reproducing the wave dispersion found in kinetic theory [O. Pokhotelov, Phys. Rev. Lett. 95, 129501 (2005)]. In this paper we give an overview of the characteristics of linear slow mode waves and mirror instability within the context of the gyrotropic Hall MHD model closed with various energy equations. The properties examined include the phase speed, the compressibility of plasma density and magnetic field, the magnetic polarization of slow mode waves, as well as the criteria for mirror instability and their dependences on pressure anisotropy, plasma beta, propagation angle, and energy closures. The analyses help to clarify the applicability and limitation with applying the gyrotropic Hall MHD model to the observed slow or mirror mode structures.

Original languageEnglish
Article number122904
Pages (from-to)1-8
Number of pages8
JournalPhysics of Plasmas
Volume12
Issue number12
DOIs
Publication statusPublished - 2005
Externally publishedYes

Fingerprint

magnetohydrodynamics
mirrors
Hall currents
Earth magnetosphere
anisotropy
wave dispersion
kinetic theory
inertia
plasma density
closures
compressibility
propagation
energy
polarization
magnetic fields
ions

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

Slow mode waves and mirror instability in gyrotropic Hall magnetohydrodynamic model. / Hau, L. N.; Wang, B. J.; Wai Leong, Teh.

In: Physics of Plasmas, Vol. 12, No. 12, 122904, 2005, p. 1-8.

Research output: Contribution to journalArticle

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