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 …

We present an updated and revised analysis of the relationship between the Hβ broad-line
region (BLR) radius and the luminosity of the active galactic nucleus (AGN). Specifically, we …

We derive improved versions of the relations between supermassive black hole mass (M
BH) and host-galaxy bulge velocity dispersion (σ) and luminosity (L; the M–σ and M–L …

We investigate the correlations between the black hole (BH) mass M BH, the velocity
dispersion σ, the bulge mass M Bu, the bulge average spherical density ${\rho} _ {{\rm {h}}} …

The supermassive black hole of M87 is one of the most massive black holes known and has
been the subject of several stellar and gas-dynamical mass measurements; however, the …

The black hole mass function of supermassive black holes describes the evolution of the
distribution of black hole mass. It is one of the primary empirical tools available for mapping …

We present high-resolution Hubble Space Telescope images of all 35 active galactic nuclei
(AGNs) with optical reverberation-mapping results, which we have modeled to create a …

I review the current status of quasar black hole (BH) mass estimations. Spectroscopic
methods have been developed to estimate BH mass in broad line quasars to an accuracy …

We present an updated and improved M bh–σ diagram containing 64 galaxies for which M
bh measurements (not just upper limits) are available. Because of new and increased black …

Supermassive black holes reside at the centers of most, if not all, massive galaxies: the
difference between active and quiescent galaxies is due to differences in mass accretion …