178 citations · 552 across the 8 of their papers we have counts for
8 papers
DISCO: A 3D Moving-Mesh Magnetohydrodynamics Code Designed for the Study of Astrophysical Disks
Paul C. Duffell
This work presents the publicly available moving-mesh magnetohydrodynamics code DISCO. DISCO is efficient and accurate at evolving orbital fluid motion in two and three dimensions,…
Halting Migration: Numerical Calculations of Corotation Torques in the Weakly Nonlinear Regime
Paul C. Duffell
Planets in their formative years can migrate due to the influence of gravitational torques in the protoplanetary disk they inhabit. For low-mass planets in an isothermal disk, it i…
Shallow Cavities in Multiple-Planet Systems
Paul C. Duffell, Ruobing Dong
Large cavities are often observed in protoplanetary disks, which might suggest the presence of planets opening gaps in the disk. Multiple planets are necessary to produce a wide ca…
Binary Black Hole Accretion During Inspiral and Merger
Brian D. Farris, Paul Duffell, Andrew I. MacFadyen +1
We present the results of 2D, moving mesh, viscous hydrodynamical simulations of accretion onto merging supermassive black hole (SMBH) binaries. We include viscous heating, shock h…
From Engine to Afterglow: Collapsars Naturally Produce Top-Heavy Jets and Early-Time Plateaus in Gamma Ray Burst Afterglows
Paul C. Duffell, Andrew I. MacFadyen
We demonstrate that the steep decay and long plateau in the early phases of gamma ray burst (GRB) X-ray afterglows are naturally produced in the collapsar model, by a means ultimat…
High-Frequency Voronoi Noise Reduced by Smoothed Mesh Motion
Paul C. Duffell, Andrew I. MacFadyen
We describe a technique for improving the performance of hydrodynamics codes which employ a moving Voronoi mesh. Currently, such codes are susceptible to high-frequency noise produ…