Active galactic nuclei (AGN) are powered by the accretion of material onto a supermassive
black hole (SMBH) and are among the most luminous objects in the Universe. However, the …

Quasars at cosmic dawn provide powerful probes of the formation and growth of the earliest
supermassive black holes (SMBHs) in the Universe, their connections to galaxy and …

We report the discovery of an accreting supermassive black hole at z= 8.679. This galaxy,
denoted here as CEERS_1019, was previously discovered as a Lyα-break galaxy by …

In this paper, we provide updated constraints on the bolometric quasar luminosity function
(QLF) from z= 0 to z= 7. The constraints are based on an observational compilation that …

We report the results of near-infrared spectroscopic observations of 37 quasars in the
redshift range 6.3< z≤ 7.64, including 32 quasars at z> 6.5, forming the largest quasar near …

We present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar catalog from Data
Release 16 of the extended Baryon Oscillation Spectroscopic Survey (eBOSS). This catalog …

Context. The AGN bolometric correction is a key element for understanding black hole (BH)
demographics and computing accurate BH accretion histories from AGN luminosities …

So far, roughly 40 quasars with redshifts greater than z= 6 have been discovered,,,,,,,. Each
quasar contains a black hole with a mass of about one billion solar masses (109),,,,,,,. The …

The mean free path of ionizing photons, λmfp, is a key factor in the photoionization of the
intergalactic medium (IGM). At z≳ 5, however, λmfp may be short enough that …

Scaling relations between central black hole (BH) mass and host galaxy properties are of
fundamental importance to studies of BH and galaxy evolution throughout cosmic time. Here …