Electromagnetic waves and electron anisotropies downstream of supercritical interplanetary shocks

@article{Wilson2012ElectromagneticWA,
  title={Electromagnetic waves and electron anisotropies downstream of supercritical interplanetary shocks},
  author={Lynn Bruce Wilson and Andriy Koval and Adam Szabo and Aaron W. Breneman and Cynthia A. Cattell and Keith Goetz and Paul J. Kellogg and Kris Kersten and Justin C. Kasper and Bennett A. Maruca and Marc P. Pulupa},
  journal={Journal of Geophysical Research: Space Physics},
  year={2012},
  volume={118},
  pages={16 - 5}
}
We present waveform observations of electromagnetic lower hybrid and whistler waves with fci ≪ f < fce downstream of four supercritical interplanetary shocks using the Wind search coil magnetometer. The whistler waves were observed to have a weak positive correlation between δB and normalized heat flux magnitude and an inverse correlation with Teh/Tec. All were observed simultaneous with electron distributions satisfying the whistler heat flux instability threshold and most with T⊥ h/T∥ h > 1… 

Figures and Tables from this paper

MMS Observations of Intense Whistler Waves Within Earth's Supercritical Bow Shock: Source Mechanism and Impact on Shock Structure and Plasma Transport
The properties of whistler waves near lower‐hybrid frequencies within Earth's quasi‐perpendicular bow shock are examined using data from the Magnetospheric Multiscale (MMS) mission. These waves
Whistler Wave Generation by Halo Electrons in the Solar Wind
We present an analysis of simultaneous particle and field measurements from the ARTEMIS spacecraft which demonstrate that quasi-parallel whistler waves in the solar wind can be generated locally by a
Whistler instabilities from the interplay of electron anisotropies in space plasmas: a quasi-linear approach
Recent statistical studies of observational data unveil relevant correlations between whistler fluctuations and the anisotropic electron populations present in space plasmas, e.g., solar wind and
Nonlinear Evolution of the Whistler Heat Flux Instability
We use the one-dimensional TRISTAN-MP particle-in-cell code to model the nonlinear evolution of the whistler heat flux instability that was proposed by Gary et al. (1999, 2000) to regulate the
Scattering of Energetic Electrons by Heat-flux-driven Whistlers in Flares
The scattering of electrons by heat-flux-driven whistler waves is explored with a particle-in-cell (PIC) simulation relevant to the transport of energetic electrons in flares. The simulation is
Waves in Kinetic‐Scale Magnetic Dips: MMS Observations in the Magnetosheath
Kinetic‐scale magnetic dips (KSMDs), with a significant depression in magnetic field strength, and scale length close to and less than one proton gyroradius, were reported in the turbulent plasmas
Whistler Mode Waves in the Compressional Boundary of Foreshock Transients
Earth's foreshock is filled with backstreaming particles that can generate a variety of waves and foreshock transients. According to recent studies, these particles can be further accelerated while
A statistical study of magnetic field fluctuations in the dayside magnetosheath and their dependence on upstream solar wind conditions
The magnetosheath functions as a natural interface connecting the interplanetary and magnetospheric plasma. Since the magnetosheath houses the shocked solar wind, it is populated with abundant
Quantified Energy Dissipation Rates: Electromagnetic Wave Observations in the Terrestrial Bow Shock
We present the first quantified measure of the rate of energy dissipated per unit volume by high frequency electromagnetic waves in the transition region of the Earth's collisionless bow shock using
Whistler instability stimulated by the suprathermal electrons present in space plasmas
In the absence of efficient collisions, deviations from thermal equilibrium of plasma particle distributions are controlled by the self-generated instabilities. The whistler instability is a
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 82 REFERENCES
Observations of electromagnetic whistler precursors at supercritical interplanetary shocks
We present observations of electromagnetic precursor waves, identified as whistler mode waves, at supercritical interplanetary shocks using the Wind search coil magnetometer. The precursors propagate
Low‐frequency whistler waves and shocklets observed at quasi‐perpendicular interplanetary shocks
[1] We present observations of low-frequency waves (0.25 Hz < f < 10 Hz) at five quasi-perpendicular interplanetary (IP) shocks observed by the Wind spacecraft. Four of the five IP shocks had oblique
Large‐amplitude electrostatic waves observed at a supercritical interplanetary shock
[1] We present the first observations at an interplanetary shock of large-amplitude (> 100 mV/m pk-pk) solitary waves and large-amplitude (∼30 mV/m pk-pk) waves exhibiting characteristics consistent
Whistler mode turbulence generated by electron beams in earth's bow shock
Abstract : In this study, the Landau and cyclotron growth rates of whistler mode waves in Earth's bow shock are calculated using electron distribution functions obtained with the fast plasma
Electron acceleration by lower hybrid waves in magnetic reconnection regions
A new model for electron acceleration in magnetic reconnection regions is developed analytically, tested using quasilinear simulations, and the qualitative predictions compared with observations of
Electron halo and strahl formation in the solar wind by resonant interaction with whistler waves
Observations of solar wind electron distribution functions (VDFs) reveal considerable deviations from a simple Maxwellian VDF. A thermal core and a suprathermal halo and antisunward, magnetic
Generation of Suprathermal Electrons by Resonant Wave-Particle Interaction in the Solar Corona and Wind
Observations of solar wind electron velocity distribution functions (VDFs) reveal pronounced deviations from a Maxwellian with enhanced numbers of suprathermal electrons. It is shown that these
Whistler waves, Langmuir waves and single loss cone electron distributions inside a magnetic cloud: Observations
Whistler waves propagating along the ambient magnetic field are observed within a coronal mass ejection (on January 10, 1997) associated in time with Langmuir waves and electron distributions of a
The whistler heat flux instability: Threshold conditions in the solar wind
Solar wind electrons are observed often to consist of two components: a core and a halo. The anisotropies and relative average speeds of these two components correspond to a heat flux that has the
Lower hybrid waves at the shock front: a reassessment
The primary process occurring at a collisionless shock is the redistribution of the bulk upstream energy into other degrees of freedom. One part of this process results in the acceleration of
...
1
2
3
4
5
...