56 citations · 110 across the 10 of their papers we have counts for
11 papers
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…
Revealing an unexpectedly low electron injection threshold via reinforced shock acceleration
Savvas Raptis, Ahmad Lalti, Martin Lindberg +3
Collisionless shock waves, found in supernova remnants, interstellar, stellar, and planetary environments, and laboratories, are one of nature's most powerful particle accelerators…
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…
Multi-Mission Observations of Relativistic Electrons and High-Speed Jets Linked to Shock Generated Transients
Savvas Raptis, Martin Lindberg, Terry Z. Liu +19
Shock-generated transients, such as hot flow anomalies (HFAs), upstream of planetary bow shocks, play a critical role in electron acceleration. Using multi-mission data from NASA's…
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…