56 citations · 110 across the 10 of their papers we have counts for
9 papers · 1 filter
Solar Magnetic Configuration Control over Radiation Belt Electrons
Ahmad Lalti, Jonathan Rae, Clare Watt +2
Earth is surrounded by two highly dynamic concentric belts of particle radiation. The outer radiation belt exhibits coherent variability at solar-cycle, seasonal, and 27-day (Carri…
Occurrence of Non-Stationarity at Earth's Quasi-Perpendicular Bow Shock
Ajay Lotekar, Yuri V. Khotyaintsev, Daniel B. Graham +3
Collisionless shocks can exhibit non-stationary behavior even under steady upstream conditions, forming a complex transition region. Ion phase-space holes, linked to shock self-ref…
Debye-scale electrostatic waves across quasi-perpendicular shocks
Ahmad Lalti, Yuri V. Khotyaintsev, Daniel B. Graham +1
The evolution of the properties of short-scale electrostatic waves across collisionless shocks remains an open question. We use a method based on the interferometry of the electric…
Ion-Acoustic Waves and the Proton-Alpha Streaming Instability at Collisionless Shocks
Daniel B. Graham, Yuri V. Khotyaintsev, Ahmad Lalti
Ion-acoustic waves are routinely observed at collisionless shocks and could be an important source of resistivity. The source of instability and the effects of the waves are not fu…
Electron heating at quasi-perpendicular collisionless shocks
Ahmad Lalti, Yuri V. Khotyaintsev, Daniel B. Graham
Adiabatic and non-adiabatic electron dynamics have been proposed to explain electron heating across collisionless shocks. We analyze the evolution of the suprathermal electrons acr…
Ion Dynamics Across a Low Mach Number Bow Shock
D. B. Graham, Yu. V. Khotyaintsev, A. P. Dimmock +4
A thorough understanding of collisionless shocks requires knowledge of how different ion species are accelerated across the shock. We investigate a bow shock crossing using the Mag…
Short wavelength electrostatic wave measurement using MMS spacecraft
Ahmad Lalti, Yuri V. Khotyaintsev, Daniel B. Graham
Determination of the wave mode of short-wavelength electrostatic waves along with their generation mechanism requires reliable measurement of the wave electric field. We investigat…
A database of MMS bow shock crossings compiled using machine learning
A. Lalti, Yu. V. Khotyaintsev, A. P. Dimmock +3
Identifying collisionless shock crossings in data sent from spacecraft has so far been done manually. It is a tedious job that shock physicists have to go through if they want to c…
Whistler Waves in the foot of Quasi-Perpendicular Super-Critical Shocks
Ahmad Lalti, Yuri Khotyaintsev, Daniel B. Graham +3
Whistler waves are thought to play an essential role in the dynamics of collisionless shocks. We use the magnetospheric multiscale (MMS) spacecraft to study whistler waves around t…