The quest for a coherent picture of nuclear activity has witnessed giant leaps in the last
decades. Four decades ago, the idea was put forward that accretion of matter onto a …

We present a physically motivated model for the early coevolution of massive spheroidal
galaxies and active nuclei at their centers. Within dark matter halos, forming at the rate …

We characterize the stellar mass of J2239+ 0207, az∼ 6.25 sub-Eddington quasar (M
1450=− 24.6), using dedicated JWST/NIRCam medium-band observations of a nearby point …

We measure host galaxy stellar masses for a sample of five luminous quasars at z∼ 5–7.
Using JWST/NIRCam medium-band images of nearby point-spread function reference stars …

In the present-day universe, supermassive black hole masses (Script M BH) appear to be
strongly correlated with their galaxy's bulge luminosity, among other properties. In this study …

We compare the average star formation (SF) activity in X-ray selected AGN hosts with a
mass-matched control sample of inactive galaxies, including both star forming and quiescent …

We present detailed clustering measurements from the 2dF Quasi-Stellar Object Redshift
Survey (2QZ) in the redshift range 0.8< z< 2.1. Using a flux-limited sample of∼ 14 000 …

At low redshift, there are fundamental correlations between the mass of supermassive black
holes (Script M BH) and the mass (Script M bulge) and luminosity of the host galaxy bulge …

Using an eigenspectrum decomposition technique, we separate the host galaxy from the
broad-line active galactic nucleus (AGN) in a set of 4666 spectra from the Sloan Digital Sky …

We present the results of a deep Hubble Space Telescope (HST)/Wide Field and Planetary
Camera 2 imaging study of 17 quasars at z≃ 0.4, designed to determine the properties of …