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Dynamical Imaging with Interferometry
Michael D. Johnson, Katherine L. Bouman, Lindy Blackburn +7
By linking widely separated radio dishes, the technique of very long baseline interferometry (VLBI) can greatly enhance angular resolution in radio astronomy. However, at any given…
Time Domain Filtering of Resolved Images of Sgr A*
Hotaka Shiokawa, Charles F. Gammie, Sheperd S. Doeleman
The goal of the Event Horizon Telescope (EHT) is to provide spatially resolved images of Sgr A*, the source associated with the Galactic Center black hole. Because Sgr A* varies on…
Quantifying Intrinsic Variability of Sagittarius A* using Closure Phase Measurements of the Event Horizon Telescope
Freek Roelofs, Michael D. Johnson, Hotaka Shiokawa +2
General relativistic magnetohydrodynamic (GRMHD) simulations of accretion disks and jets associated with supermassive black holes show variability on a wide range of timescales. On…
PATCHWORK: A Multipatch Infrastructure for Multiphysics/Multiscale/Multiframe Fluid Simulations
Hotaka Shiokawa, Roseanne M. Cheng, Scott C. Noble +1
We present a "multipatch" infrastructure for numerical simulation of fluid problems in which sub-regions require different gridscales, different grid geometries, different physical…