166 citations · 2.3k across the 59 of their papers we have counts for
5 papers · 1 filter
Resonant Drag Instabilities in protoplanetary disks: the streaming instability and new, faster-growing instabilities
Jonathan Squire, Philip F. Hopkins
We identify and study a number of new, rapidly growing instabilities of dust grains in protoplanetary disks, which may be important for planetesimal formation. The study is based o…
The Resonant Drag Instability (RDI): Acoustic Modes
Philip F. Hopkins, Jonathan Squire
Recently, Squire & Hopkins (2017) showed any coupled dust-gas mixture is subject to a class of linear 'resonant drag instabilities' (RDI). These can drive large dust-to-gas ratio f…
Resonant drag instability of grains streaming in fluids
Jonathan Squire, Philip F. Hopkins
We show that grains streaming through a fluid are generically unstable if their velocity, projected along some direction, matches the phase velocity of a fluid wave (linear oscilla…
Kinetic simulations of the interruption of large-amplitude shear-Alfvén waves in a high-beta plasma
J. Squire, M. W. Kunz, E. Quataert +1
Using two-dimensional hybrid-kinetic simulations, we explore the nonlinear "interruption" of standing and traveling shear-Alfvén waves in collisionless plasmas. Interruption involv…
The distribution of density in supersonic turbulence
Jonathan Squire, Philip F. Hopkins
We propose a model for the density statistics in supersonic turbulence, which play a crucial role in star-formation and the physics of the interstellar medium (ISM). Motivated by […