Misaligned accretion GRMHD
A tilted accretion flow around a rapidly spinning black hole.
The Extreme Astrophysics Simulator
01 · THE QUESTIONS
Physics & theory
How do gravity, magnetic fields, and plasma interact around black holes and neutron stars? Relativistic models provide a framework for exploring accretion, jets, and magnetic eruptions in these extreme environments.
02 · THE EXPERIMENTS
Numerical methods & simulations
Physical models become experiments through GPU-accelerated GRMHD simulations. H-AMR, which I co-developed, uses adaptive mesh refinement to follow complex flows; further numerical methods extend these simulations to magnetized neutron-star environments.
03 · THE SIGNALS
Astrophysical observables
Simulations connect with the sky through radiative transfer and analysis. Synthetic images, spectra, and light curves reveal how the underlying physics might appear to telescopes.
From code to cosmos
Flares near a black hole
Flaring activity in the environment of a black hole.
Jets from accretion disks GRMHD
Jets emerging from an accretion disk.
Tilted accretion and black-hole shadow GRMHD
Ray-traced simulation of a tilted accretion disk.
Simulation stillRelativistic jets H-AMR
A simulation follows a jet from near the horizon toward galactic scales.
Simulation stillWarped accretion H-AMR
Chaotic accretion can warp and bend disks and jets.
Simulation stillPulsar current sheets
A three-dimensional simulation shows structure in pulsar current sheets.
Simulation stillAccreting neutron star
A neutron-star magnetic field interacts with accreting gas.