The spin of a black hole is an important quantity to study, providing a window into the
processes by which a black hole was born and grew. Furthermore, spin can be a potent …

Quasinormal modes are eigenmodes of dissipative systems. Perturbations of classical
gravitational backgrounds involving black holes or branes naturally lead to quasinormal …

The thermal continuum emission observed from accreting black holes across X-ray bands
has the potential to be leveraged as a powerful probe of the mass and spin of the central …

We develop a new spectral model for the broad-band spectral energy distribution (SED) of
active galactic nuclei (AGN). This includes an outer standard disc, an inner warm …

This review covers the main aspects of black hole accretion disk theory. We begin with the
view that one of the main goals of the theory is to better understand the nature of black holes …

Abstract Narrow-line Seyfert 1 (NLS1) galaxies have low-mass black holes and mass
accretion rates close to (or exceeding) Eddington, so a standard blackbody accretion disc …

We review how the recent increase in X-ray and radio data from black hole and neutron star
binaries can be merged together with theoretical advances to give a coherent picture of the …

Around a million quasars have been catalogued in the Universe by probing deeper and
using new methods for discovery. However, the hardest ones to find seem to be the rarest …

Astrophysical black hole candidates are thought to be the Kerr black holes of general
relativity, but there is not yet direct observational evidence that the spacetime geometry …

The spins of ten stellar black holes have been measured using the continuum-fitting method.
These black holes are located in two distinct classes of X-ray binary systems, one that is …