Theoretical astrophysics and plasma physics at RPC

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Extended electron tails in electrostatic microinstabilities and the nonadiabatic response of passing electrons

(2021)

Authors:

MR Hardman, FI Parra, C Chong, T Adkins, MS Anastopoulos-Tzanis, M Barnes, D Dickinson, JF Parisi, H Wilson

Adaptive critical balance and firehose instability in an expanding, turbulent, collisionless plasma

(2021)

Authors:

AFA Bott, L Arzamasskiy, MW Kunz, E Quataert, J Squire

Modes of a stellar system I: Ergodic systems

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 507:2 (2021) 2241-2252

Authors:

Jun Yan Lau, James Binney

Observations of Short鈥怭eriod Ion鈥怱cale Current Sheet Flapping

Journal of Geophysical Research: Space Physics American Geophysical Union (AGU) 126:8 (2021) e2021JA029152

Authors:

L Richard, Yu V Khotyaintsev, DB Graham, MI Sitnov, O Le Contel, P鈥怉 Lindqvist

Abstract:

AbstractKink鈥恖ike flapping motions of current sheets are commonly observed in the magnetotail. Such oscillations have periods of a few minutes down to a few seconds and they propagate toward the flanks of the plasma sheet. Here, we report a short鈥恜eriod ( s) flapping event of a thin current sheet observed by the Magnetospheric Multiscale spacecraft in the dusk鈥恠ide plasma sheet following a fast Earthward plasma flow. We characterize the flapping structure using the multi鈥恠pacecraft spatiotemporal derivative and timing methods, and we find that the wave鈥恖ike structure is propagating along the average current direction with a phase velocity comparable to the ion velocity. We show that the wavelength of the oscillating current sheet scales with its thickness as expected for a drift鈥恔ink mode. The decoupling of the ion bulk motion from the electron bulk motion suggests that the current sheet is thin. We discuss the presence of the lower hybrid waves associated with gradients of density as a broadening process of the thin current sheet.

Probabilistic distribution functions

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 506:3 (2021) 4007-4010

Authors:

Jun Yan Lau, James Binney