We review recent works on the dynamics of circumbinary accretion, including time variability,
angular momentum transfer between the disk and the binary, and the secular evolution of …

Black hole and neutron star X-ray binary systems routinely show quasi-periodic oscillations
(QPOs) in their X-ray flux. Despite being strong, easily measurable signals, their physical …

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 …

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 …

This paper presents a continuation of our efforts to numerically study accretion disks that are
misaligned (tilted) with respect to the rotation axis of a Kerr black hole. Here we present …

Prevalent around luminous accreting black holes, thin discs are challenging to resolve in
numerical simulations. When the disc and black hole angular momentum vectors are …

Accreting black holes (BHs) produce intense radiation and powerful relativistic jets, which
are affected by the BH's spin magnitude and direction. Although thin disks might align with …

Here we present the study of the relative angle between the accretion disk (or radio jet) and
the galaxy disk for a sample of Seyfert galaxies selected from a mostly isotropic property, the …

Black holes are among the most extreme objects that can be found in the Universe and an
ideal laboratory for testing fundamental physics. Here, the basic properties of black holes as …

The inner parts of an accretion disk around a spinning black hole are forced to align with the
spin of the hole by the Bardeen-Petterson effect. Assuming that any jet produced by such a …