Parametric excitation of Alfvén waves by gravitational radiation

Servin, Martin; Brodin, Gert; Bradley, Michael; Marklund, Mattias

doi:10.1103/physreve.62.8493

Cited by 32 publications

(33 citation statements)

References 15 publications

(38 reference statements)

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“…We have already given (see above) several references concerning the swing (parametric) interactions between different MHD waves in equilibrium magnetic structures, which directly have been applied to the magnetized solar atmosphere. On the other hand, there are many studies, which reveal the importance of parametric resonances at galactic and cosmological scales (for instance, see [5,8,18,37]). It should be emphasized that the results obtained in this work may explain the properties of oscillatory phenomena in astrophysical objects being away from thermodynamic equilibrium and sustaining forced entropy oscillations.…”

Section: Discussionmentioning

confidence: 99%

Amplification of compressional magnetohydrodynamic waves in systems with forced entropy oscillations

et al. 2007

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The propagation of compressional MHD waves is studied for an externally driven system. It is assumed that the combined action of the external sources and sinks of the entropy results in the harmonic oscillation of the entropy (and temperature) in the system. It is found that with the appropriate resonant conditions fast and slow waves get amplified due to the phenomenon of parametric resonance. In addition, it is shown that the considered waves are mutually coupled as a consequence of the nonequilibrium state of the background medium. The coupling is strongest when the plasma beta approximately 1 . The proposed formalism is sufficiently general and can be applied to many dynamical systems, both under terrestrial and astrophysical conditions.

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Section: Discussionmentioning

confidence: 99%

Amplification of compressional magnetohydrodynamic waves in systems with forced entropy oscillations

et al. 2007

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“…where we have omitted the fluid species index, s, and it is understood that we have one pair of fluid equations (11,12) for each plasma fluid species. We have introduced the 3-vector notation E ≡ (E α ) = (E 1 , E 2 , E 3 ) etc.…”

Section: Basic Equationsmentioning

confidence: 99%

Nonlinear coupled Alfvén and gravitational waves

2004

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In this paper we consider nonlinear interaction between gravitational and electromagnetic waves in a strongly magnetized plasma. More specifically, we investigate the propagation of gravitational waves with the direction of propagation perpendicular to a background magnetic field, and the coupling to compressional Alfvén waves. The gravitational waves are considered in the high frequency limit and the plasma is modelled by a multifluid description. We make a self-consistent, weakly nonlinear analysis of the Einstein-Maxwell system and derive a wave equation for the coupled gravitational and electromagnetic wave modes. A WKB-approximation is then applied and as a result we obtain the nonlinear Schrödinger equation for the slowly varying wave amplitudes. The analysis is extended to 3D wave pulses, and we discuss the applications to radiation generated from pulsar binary mergers. It turns out that the electromagnetic radiation from a binary merger should experience a focusing effect, that in principle could be detected.

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“…The direct escape of plasma radiation is not possible without a nonlinear conversion (see . Recently Servin et al (2000) discuss the non-linear parametric excitation of Alfvén waves by a strong monochromatic GW. A nonlinear study of shock waves in a highly magnetized plasma, driven by GWs has been presented by Ignat'ev (1997).…”

Section: Introductionmentioning

confidence: 99%

Fast magnetosonic waves driven by gravitational waves

Papadopoulos

Stergioulas

Vlahos

et al. 2001

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Abstract. The propagation of a gravitational wave (GW) through a magnetized plasma is considered. In particular, we study the excitation of fast magnetosonic waves (MSW) by a gravitational wave, using the linearized generalrelativistic hydromagnetic equations. We derive the dispersion relation for the plasma, treating the gravitational wave as a perturbation in a Minkowski background space-time. We show that the presence of gravitational waves will drive magnetosonic waves in the plasma and discuss the potential astrophysical implications.

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Parametric excitation of Alfvén waves by gravitational radiation

Cited by 32 publications

References 15 publications

Amplification of compressional magnetohydrodynamic waves in systems with forced entropy oscillations

Amplification of compressional magnetohydrodynamic waves in systems with forced entropy oscillations

Nonlinear coupled Alfvén and gravitational waves

Fast magnetosonic waves driven by gravitational waves

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