Generation of Alfvén waves in an anomalous resistivity region

Arykov, A. A.; Maltsev, Y. P.

doi:10.1016/0032-0633(83)90076-4

Cited by 7 publications

(13 citation statements)

References 11 publications

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“…At some moment, when j 0 exceeds a plasma instability threshold the sudden (on MHD time scale) onset of anomalous σ occurs. This moment, as suggested by Arykov and Maltsev (1983), is to be accompanied by the appearance of transient AI.…”

Section: General Physics Of the Magnetosphere-ionosphere Interactionmentioning

confidence: 99%

“…In a simplified case, corresponding to the elongated box-like profile of the ARL (δ→0), the AI spatial structure can be described analytically (Arykov and Maltsev, 1983). From Eq.…”

Section: Structure Of the Alfvén Impulse In A Step-wise Arlmentioning

confidence: 99%

“…The induced field-aligned current density j zA (x, y, t) can be expressed directly through the potential ϕ (Arykov and Maltsev, 1983). From the linearized basic Eqs.…”

Section: Generation Of Alfvénic Impulse During the Switch-on Of Anomamentioning

confidence: 99%

“…From relationship (7) the equation from (Arykov and Maltsev, 1983) for the wave potential ϕ (bound to the transverse electric field by the relation E ⊥ =−∇ ⊥ ϕ) can be obtained by the substitution j…”

Section: Generation Of Alfvénic Impulse During the Switch-on Of Anomamentioning

confidence: 99%

“…The sudden onset of field-aligned resistance is to be accompanied by the excitation of Alfvénic impulse (AI), as was originally suggested by Arykov and Maltsev (1983). We develop a mathematical formalism for the description of the AI spatial structure and discuss some implications of this model.…”

Section: Introductionmentioning

confidence: 99%

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Excitation of Alfvén impulse by the anomalous resistance onset on the auroral field lines

et al. 2005

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Abstract. The onset of anomalous resistance in a layer on auroral field lines is shown to be accompanied by the excitation of an Alfvénic impulse (AI). The generated AI marks the transition of the global magnetosphere-ionosphere instability into an explosive phase with positive feedback. The spatial structure of this impulse both in space and on the ground has been described analytically and numerically under the thin layer approximation. The field-aligned currents transported by the Alfvénic impulse are concentrated near the edges of the layer with anomalous resistivity, whereas the reverse currents are spread throughout the layer. For some parameters of the layer the ionospheric attenuation of even small-scale structures is not dramatically large, so the magnetic response to the generated AI may be observed on the ground. The considered event on 3 January 1997 with magnetic-auroral intensification observed by ground magnetometers and Polar UV imager agrees with the model proposed.

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Section: General Physics Of the Magnetosphere-ionosphere Interactionmentioning

confidence: 99%

“…In a simplified case, corresponding to the elongated box-like profile of the ARL (δ→0), the AI spatial structure can be described analytically (Arykov and Maltsev, 1983). From Eq.…”

Section: Structure Of the Alfvén Impulse In A Step-wise Arlmentioning

confidence: 99%

“…The induced field-aligned current density j zA (x, y, t) can be expressed directly through the potential ϕ (Arykov and Maltsev, 1983). From the linearized basic Eqs.…”

Section: Generation Of Alfvénic Impulse During the Switch-on Of Anomamentioning

confidence: 99%

Section: Generation Of Alfvénic Impulse During the Switch-on Of Anomamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Excitation of Alfvén impulse by the anomalous resistance onset on the auroral field lines

et al. 2005

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Anomalous Transport Induced by Field Aligned Currents and its Relation to Electromagnetic Coupling

Dum

1985

Unstable Current Systems and Plasma Instabilities in Astrophysics

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Interaction of Alfvén front with the plasma anomalous resistance layer

et al. 2007

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Abstract.The efficiency of the Alfvén impulse excitation in the auroral zone of the terrestrial magnetosphere upon the onset of the anomalous field-aligned resistance has been estimated. The impulsive disturbance excited during the onset of anomalous field-aligned resistance and electric field may signify the transition of a global magnetospheric instability into the explosive phase with positive feedback. We consider the self-consistent problem on excitation of anomalous resistance at the front of field-aligned current and reverse influence upon it from the induced currents. The analytical solution of the self-consistent problem has shown that during the entrance of field-aligned current front into the anomalous resistivity layer (ARL) an Alfvénic impulse is generated. The interaction of the external current with ARL results in the delay of the current growth. The impulse duration and delay time depend on the ratio between the Alfvén damping scale and external current width. The solution obtained indicates the possibility of using the Alfvénic impulse as an indicator of distant occurrence of anomalous resistance.

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Generation of Alfvén waves in an anomalous resistivity region

Cited by 7 publications

References 11 publications

Excitation of Alfvén impulse by the anomalous resistance onset on the auroral field lines

Excitation of Alfvén impulse by the anomalous resistance onset on the auroral field lines

Anomalous Transport Induced by Field Aligned Currents and its Relation to Electromagnetic Coupling

Interaction of Alfvén front with the plasma anomalous resistance layer

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