Determination of the dispersion of low frequency waves downstream of a quasiperpendicular collisionless shock

M. A. Balikhin; L. J.C. Woolliscroft; H. St C. Alleyne; M. Dunlop; M. A. Gedalin

doi:10.1007/s00585-997-0143-x

Determination of the dispersion of low frequency waves downstream of a quasiperpendicular collisionless shock

M. A. Balikhin, L. J.C. Woolliscroft, H. St C. Alleyne, M. Dunlop, M. A. Gedalin

Department of Physics

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

A method of wave mode determination, which was announced in Balikhin and Gedalin, is applied to AMPTE UKS and AMPTE IRM magnetic field measurements downstream of supercritical quasiperpendicular shock. The method is based on the fact that the relation between phase difference of the waves measured by two satellites, Doppler shift equation, the direction of the wave propagation are enough to obtain the dispersion equation of the observed waves. It is shown that the low frequency turbulence mainly consists of waves observed below 1 Hz with a linear dependence between the absolute value of wave vector |k| and the plasma frame wave frequency. The phase velocity of these waves is close to the phase velocity of intermediate waves V_int = V_acos(θ).

Original language	English
Pages (from-to)	143-151
Number of pages	9
Journal	Annales Geophysicae
Volume	15
Issue number	2
DOIs	https://doi.org/10.1007/s00585-997-0143-x
State	Published - 1 Jan 1997

ASJC Scopus subject areas

Astronomy and Astrophysics
Geology
Atmospheric Science
Earth and Planetary Sciences (miscellaneous)
Space and Planetary Science

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title = "Determination of the dispersion of low frequency waves downstream of a quasiperpendicular collisionless shock",

abstract = "A method of wave mode determination, which was announced in Balikhin and Gedalin, is applied to AMPTE UKS and AMPTE IRM magnetic field measurements downstream of supercritical quasiperpendicular shock. The method is based on the fact that the relation between phase difference of the waves measured by two satellites, Doppler shift equation, the direction of the wave propagation are enough to obtain the dispersion equation of the observed waves. It is shown that the low frequency turbulence mainly consists of waves observed below 1 Hz with a linear dependence between the absolute value of wave vector |k| and the plasma frame wave frequency. The phase velocity of these waves is close to the phase velocity of intermediate waves Vint = Vacos(θ).",

author = "Balikhin, {M. A.} and Woolliscroft, {L. J.C.} and Alleyne, {H. St C.} and M. Dunlop and Gedalin, {M. A.}",

note = "Funding Information: Acknowledgements. The authors acknowledge valuable discussions with Dr. S. Walker, Dr. V.V. Krasnosel{\textquoteleft}skikh, Dr. D. Lagoutte, and Dr. C. Lacombe. Software IMOS, which was developed in LPCE by Dr. Lagoutte and P. Latremoliere, was used in the data analysis. AMPTE IRM data were kindly provided by Dr. H. L{\"u}hr and Dr. W. Baumjohann. AMPTE UKS data were kindly provided by Prof. D. Southwood (magnetic field), Prof. S.J. Schwartz and Dr. A. Coates (plasma data). M. Balikhin was funded by a grant from the UK PPARC during the preparation of the final version of the work.",

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doi = "10.1007/s00585-997-0143-x",

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AU - Woolliscroft, L. J.C.

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AU - Dunlop, M.

AU - Gedalin, M. A.

N1 - Funding Information: Acknowledgements. The authors acknowledge valuable discussions with Dr. S. Walker, Dr. V.V. Krasnosel‘skikh, Dr. D. Lagoutte, and Dr. C. Lacombe. Software IMOS, which was developed in LPCE by Dr. Lagoutte and P. Latremoliere, was used in the data analysis. AMPTE IRM data were kindly provided by Dr. H. Lühr and Dr. W. Baumjohann. AMPTE UKS data were kindly provided by Prof. D. Southwood (magnetic field), Prof. S.J. Schwartz and Dr. A. Coates (plasma data). M. Balikhin was funded by a grant from the UK PPARC during the preparation of the final version of the work.

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AB - A method of wave mode determination, which was announced in Balikhin and Gedalin, is applied to AMPTE UKS and AMPTE IRM magnetic field measurements downstream of supercritical quasiperpendicular shock. The method is based on the fact that the relation between phase difference of the waves measured by two satellites, Doppler shift equation, the direction of the wave propagation are enough to obtain the dispersion equation of the observed waves. It is shown that the low frequency turbulence mainly consists of waves observed below 1 Hz with a linear dependence between the absolute value of wave vector |k| and the plasma frame wave frequency. The phase velocity of these waves is close to the phase velocity of intermediate waves Vint = Vacos(θ).

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Determination of the dispersion of low frequency waves downstream of a quasiperpendicular collisionless shock

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