153 citations · 398 across the 15 of their papers we have counts for
16 papers
On the double-adiabatic equations in the relativistic regime
Francisco Ley, Aaron Tran, Ellen G. Zweibel
We revisit the double adiabatic evolution equations and extend them to the relativistic and ultrarelativistic regimes. We analytically solve the relativistic, time-dependent drift…
Compression-Driven Kinetic Instabilities in Magnetically Arrested Disks
Vedant Dhruv, Lorenzo Sironi, Jordy Davelaar +1
Event horizon-scale observations of low-luminosity black hole accretion flows favor magnetically arrested disks, characterized by dynamically important magnetic fields ($β\lesssim1…
Drift-cyclotron loss-cone instability in 3D simulations of a sloshing-ion simple mirror
Aaron Tran, Samuel J. Frank, Ari Y. Le +11
The kinetic stability of collisionless, sloshing beam-ion (45° pitch angle) plasma is studied in a 3D simple magnetic mirror, mimicking the Wisconsin High-temperature superconducto…
Electrostatic Waves and Electron Holes in Simulations of Low-Mach Quasi-Perpendicular Shocks
Artem Bohdan, Aaron Tran, Lorenzo Sironi +1
Collisionless low Mach number shocks are abundant in astrophysical and space plasma environments, exhibiting complex wave activity and wave-particle interactions. In this paper, we…
Electron Heating in the Trans-Relativistic Perpendicular Shocks of Tilted Accretion Flows
Lorenzo Sironi, Aaron Tran
General relativistic magnetohydrodynamic (GRMHD) simulations of black hole tilted disks -- where the angular momentum of the accretion flow at large distances is misaligned with re…
Electron Heating in 2D Particle-in-Cell Simulations of Quasi-Perpendicular Low-Beta Shocks
Aaron Tran, Lorenzo Sironi
We measure the thermal electron energization in 1D and 2D particle-in-cell (PIC) simulations of quasi-perpendicular, low-beta () collisionless ion-electron shocks with ma…
Electron-Ion Temperature Ratio in Astrophysical Shocks
John C. Raymond, Parviz Ghavamian, Artem Bohdan +9
Collisionless shock waves in supernova remnants and the solar wind heat electrons less effectively than they heat ions, as is predicted by kinetic simulations. However, the values…
Early Evolution and 3D Structure of Embedded Star Clusters
Claude Cournoyer-Cloutier, Alison Sills, William E. Harris +8
We perform simulations of star cluster formation to investigate the morphological evolution of embedded star clusters in the earliest stages of their evolution. We conduct our simu…
Radiation shielding of protoplanetary discs in young star-forming regions
Maite J. C. Wilhelm, Simon Portegies Zwart, Claude Cournoyer-Cloutier +4
Protoplanetary discs spend their lives in the dense environment of a star forming region. While there, they can be affected by nearby stars through external photoevaporation and dy…
Early-Forming Massive Stars Suppress Star Formation and Hierarchical Cluster Assembly
Sean C. Lewis, Stephen L. W. McMillan, Mordecai-Mark Mac Low +8
Feedback from massive stars plays an important role in the formation of star clusters. Whether a very massive star is born early or late in the cluster formation timeline has profo…
Electron Re-acceleration via Ion Cyclotron Waves in the Intracluster Medium
Aaron Tran, Lorenzo Sironi, Francisco Ley +2
In galaxy clusters, the intracluster medium (ICM) is expected to host a diffuse, long-lived, and invisible population of "fossil" cosmic-ray electrons (CRe) with 1-100 MeV energies…
A Heating Mechanism via Magnetic Pumping in the Intracluster Medium
Francisco Ley, Ellen G. Zweibel, Mario Riquelme +3
Turbulence driven by AGN activity, cluster mergers and galaxy motion constitutes an attractive energy source for heating the intracluster medium (ICM). How this energy dissipates i…
Implementing Primordial Binaries in Simulations of Star Cluster Formation with a Hybrid MHD and Direct N-Body Method
Claude Cournoyer-Cloutier, Aaron Tran, Sean Lewis +6
The fraction of stars in binary systems within star clusters is important for their evolution, but what proportion of binaries form by dynamical processes after initial stellar acc…
Electron Heating in Perpendicular Low-Beta Shocks
Aaron Tran, Lorenzo Sironi
Collisionless shocks heat electrons in the solar wind, interstellar blast waves, and hot gas permeating galaxy clusters. How much shock heating goes to electrons instead of ions, a…
Energy Dependence of Synchrotron X-Ray Rims in Tycho's Supernova Remnant
Aaron Tran, Brian J. Williams, Robert Petre +2
Several young supernova remnants exhibit thin X-ray bright rims of synchrotron radiation at their forward shocks. Thin rims require strong magnetic field amplification beyond simpl…
Fueling AGN II: Spatially Resolved Molecular Inflows and Outflows
R. I. Davies, W. Maciejewski, E. K. S. Hicks +11
We analyse the 2-dimensional distribution and kinematics of the stars as well as molecular and ionised gas in the central few hundred parsecs of 5 active and 5 matched inactive gal…