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 outline the impact of a small two-band UV-photometry satellite mission on the field of
stellar physics, magnetospheres of stars, binaries, stellar clusters, interstellar matter, and …

We show that the radial velocity variable star in the black hole (BH) candidate NGC 1850
BH1 cannot be a normal subgiant, as was proposed, but is an overluminous stripped …

Context. The recent gravitational wave measurements have demonstrated the existence of
stellar mass black hole binaries. It is essential for our understanding of massive star …

Context. HR 6819 was recently proposed to be a triple system consisting of an inner B-type
giant plus black hole (BH) binary with an orbital period of 40 d and an outer Be tertiary. This …

We compile a catalogue of low-mass and high-mass X-ray binaries, some recently reported
binaries that likely host a neutron star (NS) or a black hole (BH), and binary pulsars (a pulsar …

The recently discovered binary LB-1 has been reported to contain a black hole (BH). The
evidence for the unprecedentedly high mass of the unseen companion comes from reported …

ABSTRACT HR 6819 is a bright (V= 5.36), blue star recently proposed to be a triple
containing a detached black hole (BH). We show that the system is a binary and does not …

Aims. We present an open-access database that includes a synthetic catalog of black holes
(BHs) in the Milky Way, divided by the components disk, bulge, and halo. Methods. To …

Context. The intermediate-mass pre-main sequence Herbig Ae/Be stars are key to
understanding the differences in formation mechanisms between low-and high-mass stars …