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 …

As the luminosity of an accreting black hole drops to a few percent of Eddington, the
spectrum switches from the familiar soft state to a hard state that is well-described by a …

We present an analysis of the host properties of 85 224 emission-line galaxies selected from
the Sloan Digital Sky Survey. We show that Seyferts and low-ionization narrow emission-line …

Black hole X-ray binaries (BHXBs) are known to display five distinct spectral states. In order
of increasing luminosity these are the quiescent state, low state, intermediate state, high …

We study the spectral properties of a very general class of accretion disks which can be
decomposed into three distinct components apart from a shock at $ r= r_s $:(1) An optically …

Sagittarius A*, which is located at the Galactic center, is a puzzling source. It has a mass of
M=(2.5±0.4)× 10 6 M &sun;, which makes it an excellent black hole candidate. Observations …

Many models of gamma-ray bursts (GRBs) involve accretion onto a compact object, usually
a black hole, at a mass accretion rate on the order of a fraction of a solar mass per second. If …

ABSTRACT A fundamental component of models of active galactic nuclei (AGNs) is an
accretion disk around a supermassive black hole. However, the nature of this accretion disk …

We consider height-integrated equations of an advection-dominated accretion flow (ADAF),
assuming that there is no mass outflow. We include convection through a mixing-length …

ABSTRACT A model is presented in which the strongest radio-emitting jet outflows are
produced in black hole systems when the accretion is a geometrically thick (H/R∼ 1) inflow …