Langmuir waves in a fluctuating solar wind

Kellogg, P. J.; Goetz, K.; Monson, S. J.; Bale, S. D.

doi:10.1029/1999ja900163

Cited by 62 publications

(78 citation statements)

References 11 publications

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“…As was described in previous studies [Kellogg et al, 1999] and as can be seen in Figure 1, the vast majority of observed foreshock Langmuir waves is strongly modulated on the timescales of milliseconds. This modulation and the dependence of its characteristic time on wave amplitude was previously studied by Bale et al [1997].…”

Section: Comparison Of Calculated Threshold With Experimentssupporting

confidence: 49%

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Nonlinear decay of foreshock Langmuir waves in the presence of plasma inhomogeneities: Theory and Cluster observations

et al. 2005

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[1] The intense high-frequency electrostatic waves observed in the terrestrial foreshock often have a form of a superposition of two monochromatic waves close to the plasma frequency. We suggest an interpretation of these spectra as signatures of nonlinear decay of Langmuir waves to electron-sound and ion-sound secondary waves. This decay instability is known to have different properties in inhomogeneous plasma, namely the threshold amplitude of this instability is inversely proportional to the scale of the inhomogeneity. We show that the observed dependence of the wave amplitude on the modulation scale of the wave packets is consistent with this property and the theory of absolute decay instability in inhomogeneous plasma can be applied to explain the satellite observations. In this study we used electric field data from the Wide Band Data instrument on board Cluster satellites.

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Section: Comparison Of Calculated Threshold With Experimentssupporting

confidence: 49%

“…Significant inhomogeneities are known to exist in solar wind plasmas, the level of density fluctuations can reach 10% as shown by Kellogg et al [1999].…”

Section: Model and Interpretationmentioning

confidence: 99%

Nonlinear decay of foreshock Langmuir waves in the presence of plasma inhomogeneities: Theory and Cluster observations

et al. 2005

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“…The microphysics of the plasma emission process underwent a paradigm shift due to WIND observations of elliptically polarized plasma waves at 1 f pe in the source of these bursts, where longitudinally polarized Langmuir waves were expected (Bale et al 1998b;Kellogg et al 1999). This observation implies strong scattering or possibly wave trapping.…”

Section: Space Plasma Microphysicsmentioning

confidence: 99%

STEREO IMPACT Investigation Goals, Measurements, and Data Products Overview

et al. 2007

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The IMPACT (In situ Measurements of Particles And CME Transients) investigation on the STEREO mission was designed and developed to provide multipoint solar wind and suprathermal electron, interplanetary magnetic field, and solar energetic particle information required to unravel the nature of coronal mass ejections and their heliospheric consequences. IMPACT consists of seven individual sensors which are packaged into a boom suite, and a SEP suite. This review summarizes the science objectives of IMPACT, the instruments that comprise the IMPACT investigation, the accommodation of IMPACT on the STEREO twin spacecraft, and the overall data products that will flow from the IMPACT measurements. Accompanying papers in this volume of Space Science Reviews highlight the individual sensor technical details and capabilities, STEREO project plans for the use of IMPACT data, and modeling activities for IMPACT (and other STEREO) data interpretation.

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“…Cairns 1988). On the other hand, density turbulence can mode-convert Langmuir waves into f p radiation and also reflect Langmuir waves so that they can then undergo the standard coalescence L + L → T (2f p ) to produce 2f p radiation (Bale et al 1998;Yin et al 1998;Kellogg et al 1999). SGT can incorporate linear mode conversion and/or the nonlinear processes as the generation mechanisms for the radiation.…”

Section: Earth's Foreshockmentioning

confidence: 99%

“…One question raised recently (see next section) is whether an alternative theory for the radio emission processes, involving linear mode conversion and reflection processes in density gradients, is sometimes relevant. The time is now ripe for testing the SGT theory with (1) a large sample of type III bursts, (2) high time-resolution data on individual Langmuir wave packets from the Wind spacecraft (Bale et al 1997;Kellogg et al 1999), and (3) polarisation data.…”

Section: Type III Solar Radio Burstsmentioning

confidence: 99%

Progress on Coronal, Interplanetary, Foreshock, and Outer Heliospheric Radio Emissions

Cairns

Robinson

Zank

2000

Publ. – Astron. Soc. Aust

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Type II and III solar radio bursts are associated with shock waves and streams of energetic electrons, respectively, which drive plasma waves and radio emission at multiples of the electron plasma frequency as they move out from the corona into the interplanetary medium. Analogous plasma waves and radiation are observed from the foreshock region upstream of Earth's bow shock. In situ spacecraft observations in the solar wind have enabled major progress to be made in developing quantitative theories for these phenomena that are consistent with available data. Similar processes are believed responsible for radio emissions at 2-3 kHz that originate in the distant heliosphere, from where the solar wind interacts with the local interstellar medium. The primary goal of this paper is to review the observations and theories for these four classes of emissions, focusing on recent progress in developing detailed theories for the plasma waves and radiation in the source regions. The secondary goal is to introduce and review stochastic growth theory, a recent theory which appears quantitatively able to explain the wave observations in type III bursts and Earth's foreshock and is a natural theory to apply to type II bursts, the outer heliospheric emissions, and perhaps astrophysical emissions.

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Langmuir waves in a fluctuating solar wind

Cited by 62 publications

References 11 publications

Nonlinear decay of foreshock Langmuir waves in the presence of plasma inhomogeneities: Theory and Cluster observations

Nonlinear decay of foreshock Langmuir waves in the presence of plasma inhomogeneities: Theory and Cluster observations

STEREO IMPACT Investigation Goals, Measurements, and Data Products Overview

Progress on Coronal, Interplanetary, Foreshock, and Outer Heliospheric Radio Emissions

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