424 citations · 2.6k across the 108 of their papers we have counts for
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Limits on Alpha Particle Temperature Anisotropy and Differential Flow from Kinetic Instabilities: Solar Wind Observations
Sofiane Bourouaine, Daniel Verscharen, Benjamin D. G. Chandran +2
Previous studies have shown that the observed temperature anisotropies of protons and alpha particles in the solar wind are constrained by theoretical thresholds for pressure-aniso…
Spectral evolution of two-dimensional kinetic plasma turbulence in the wavenumber-frequency domain
H. Comişel, D. Verscharen, Y. Narita +1
We present a method for studying the evolution of plasma turbulence by tracking dispersion relations in the energy spectrum in the wavenumber-frequency domain. We apply hybrid plas…
Instabilities Driven by the Drift and Temperature Anisotropy of Alpha Particles in the Solar Wind
Daniel Verscharen, Sofiane Bourouaine, Benjamin D. G. Chandran
We investigate the conditions under which parallel-propagating Alfvén/ion-cyclotron (A/IC) waves and fast-magnetosonic/whistler (FM/W) waves are driven unstable by the differential…
Stochastic Heating, Differential Flow, and the Alpha-to-Proton Temperature Ratio in the Solar Wind
B. D. G. Chandran, D. Verscharen, E. Quataert +3
We extend previous theories of stochastic ion heating to account for the motion of ions along the magnetic field. We derive an analytic expression for the ion-to-proton perpendicul…
A Parallel-Propagating Alfvénic Ion-Beam Instability in the High-Beta Solar Wind
Daniel Verscharen, Sofiane Bourouaine, Benjamin D. G. Chandran +1
We investigate the conditions under which parallel-propagating Alfvén/ion-cyclotron waves are driven unstable by an isotropic () population of alpha p…
The Dispersion Relations and Instability Thresholds of Oblique Plasma Modes in the Presence of an Ion Beam
Daniel Verscharen, Benjamin D. G. Chandran
An ion beam can destabilize Alfvén/ion-cyclotron waves and magnetosonic/whistler waves if the beam speed is sufficiently large. Numerical solutions of the hot-plasma dispersion rel…