Supermassive black holes (BHs) have been found in 85 galaxies by dynamical modeling of
spatially resolved kinematics. The Hubble Space Telescope revolutionized BH research by …

The formation of the first stars and quasars marks the transformation of the universe from its
smooth initial state to its clumpy current state. In popular cosmological models, the first …

First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive
Black Hole in the Center of the Milky Way - IOPscience Skip to content IOP Science home …

Astrophysical black holes are expected to be described by the Kerr metric. This is the only
stationary, vacuum, axisymmetric metric, without electromagnetic charge, that satisfies …

The NANOGrav 15 yr data set shows evidence for the presence of a low-frequency
gravitational-wave background (GWB). While many physical processes can source such low …

We examine the properties of the host galaxies of 22 623 narrow-line active galactic nuclei
(AGN) with 0.02< z< 0.3 selected from a complete sample of 122 808 galaxies from the …

Context. Aims. Active galactic nuclei are known to have complex X-ray spectra that depend
on both the properties of the accreting super-massive black hole (eg mass, accretion rate) …

We describe a correlation between the mass M bh of a galaxy's central black hole and the
luminosity-weighted line-of-sight velocity dispersion σ e within the half-light radius. The …

We show that the recent NANOGrav result can be interpreted as a stochastic gravitational
wave signal associated to formation of primordial black holes from high-amplitude curvature …

We present an evolutionary model for starbursts, quasars, and spheroidal galaxies in which
mergers between gas-rich galaxies drive nuclear inflows of gas, producing starbursts and …