5 papers
A coupled guiding center-Boris particle pusher for magnetized plasmas in compact-object magnetospheres
Fabio Bacchini, Bart Ripperda, Alexander A. Philippov +1
We present a novel numerical scheme for simulating the motion of relativistic charged particles in magnetospheres of compact objects, typically filled with highly magnetized collis…
Magnetic Reconnection and Hot Spot Formation in Black Hole Accretion Disks
Bart Ripperda, Fabio Bacchini, Alexander Philippov
Hot spots, or plasmoids, forming due to magnetic reconnection in current sheets, are conjectured to power frequent X-ray and near-infrared flares from Sgr A*, the black hole in the…
General relativistic resistive magnetohydrodynamics with robust primitive variable recovery for accretion disk simulations
Bart Ripperda, Fabio Bacchini, Oliver Porth +6
Recent advances in black hole astrophysics, particularly the first visual evidence of a supermassive black hole at the center of the galaxy M87 by the Event Horizon Telescope (EHT)…
Numerical methods for General Relativistic particles
Fabio Bacchini, Bart Ripperda, Lorenzo Sironi
We present recent developments on numerical algorithms for computing photon and particle trajectories in the surrounding of compact objects. Strong gravity around neutron stars or…
Generalized, energy-conserving numerical simulations of particles in general relativity. II. Test particles in electromagnetic fields and GRMHD
Fabio Bacchini, Bart Ripperda, Oliver Porth +1
Direct observations of compact objects, in the form of radiation spectra, gravitational waves from VIRGO/LIGO, and forthcoming direct imaging, are currently one of the primary sour…