I review the basics of the disc instability model (DIM) for dwarf novae and soft-X-ray
transients and its most recent developments, as well as the current limitations of the model …

Accretion disks around supermassive black holes in active galactic nuclei produce
continuum radiation at ultraviolet and optical wavelengths. Physical processes in the …

Quasiperiodic erupters are a remarkable class of objects exhibiting very-large-amplitude
quasiperiodic X-ray flares. Although numerous dynamical models have been proposed to …

We report results from global ideal MHD simulations that study thin accretion disks (with
thermal scale height H/R= 0.1 and 0.05) threaded by net vertical magnetic fields. Our …

Recurring outbursts associated with matter flowing onto compact stellar remnants (such as
black holes, neutron stars and white dwarfs) in close binary systems provide a way of …

Protoplanetary discs are made of gas and dust orbiting a young star. They are also the birth
place of planetary systems, which motivates a large amount of observational and theoretical …

We study the structure of accretion disks around supermassive black holes in the radial
range of–100 gravitational radii, using a three-dimensional radiation magnetohydrodynamic …

Accretion disks around supermassive black holes have regions where the Rosseland mean
opacity can be larger than the electron scattering opacity due to the large number of bound …

We present bhlight, a numerical scheme for solving the equations of general relativistic
radiation magnetohydrodynamics using a direct Monte Carlo solution of the frequency …

Radiation-driven outflows play a crucial role in extracting mass and angular momentum from
binary systems undergoing rapid mass transfer at super-Eddington rates. To study the mass …