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 …

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 report discovery of a bright, nearby () Sun-like star orbiting a dark object. We identified
the system as a black hole candidate via its astrometric orbital solution from the Gaia …

We report spectroscopic and photometric follow-up of a dormant black hole (BH) candidate
from Gaia DR3. The system, which we call Gaia BH2, contains a∼ 1 M⊙ red giant and a …

Aims. During the last~ 50 years, the population of black hole candidates in X-ray binaries
has increased considerably, with 59 Galactic objects being detected in transient low-mass X …

With the advent of more sensitive all-sky instruments, the transient universe is being probed
in greater depth than ever before. Taking advantage of available resources, we have …

We present a new edition of the catalogue of the low-mass X-ray binaries in the Galaxy and
the Magellanic Clouds. The catalogue contains source name (s), coordinates, finding chart …

The existing radio and X-ray flux correlation for Galactic black holes in the hard and
quiescent states relies on a sample which is mostly dominated by two sources (GX 339− 4 …

Hundreds of stellar-mass black holes probably form in a typical globular star cluster, with all
but one predicted to be ejected through dynamical interactions,,. Some observational …

We present the first systematic analysis of the X-ray variability of Sgr A* during the Chandra
X-ray Observatory's 2012 Sgr A* X-ray Visionary Project. With 38 High Energy Transmission …