Black hole accretion flows can be divided into two broad classes: cold and hot. Whereas
cold accretion flows consist of cool optically thick gas and are found at relatively high mass …

The disc instability model which is supposed to describe outbursts of dwarf nova and low-
mass X-ray binary transient systems is presented and reviewed in detail. Various …

A long-standing question is whether active galactic nuclei (AGN) vary like Galactic black
hole systems when appropriately scaled up by mass,,. If so, we can then determine how …

Observations have revealed strong evidence for powerful jets in the Low/Hard states of
black hole candidate X-ray binaries. Correlations, both temporal and spectral, between the …

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 …

We present the long term evolution of the timing properties of the black hole candidate
Cygnus X–1 in the 0.002–128 Hz frequency range as monitored from 1998 to 2001 with the …

We investigate the effects of AGN feedback on the cosmological evolution of an isolated
elliptical galaxy by performing two-dimensional high-resolution hydrodynamical numerical …

The Galactic black hole candidate X-ray binary GX 339-4 spends most of its time in the
low/hard state, making it an ideal candidate for modeling the assumedly low accretion …

We present a model for a corona above a geometrically thin standard disk around a black
hole. This corona is fed by matter from the thin disk which evaporates from the cool layers …

We investigate the model of the disc/corona accretion flow around the black hole. The
model, parameterized by the total (ie disk plus corona) accretion rate, $\dot m $, mass of the …