The existence of∼ 109M⊙ supermassive black holes (SMBHs) within the first billion years
of the Universe has stimulated numerous ideas for the prompt formation and rapid growth of …

Intermediate-mass black holes (IMBHs), with masses in the range 1 0 0–1 0 6 M⊙, are the
link between stellar-mass BHs and supermassive BHs (SMBHs). They are thought to be the …

We report on the discovery of two low-luminosity, broad-line active galactic nuclei (AGNs) at
z> 5 identified using JWST NIRSpec spectroscopy from the Cosmic Evolution Early Release …

The presence of excess scatter in the Ly-α forest at z∼ 5.5, together with the existence of
sporadic extended opaque Gunn-Peterson troughs, has started to provide robust evidence …

The final phase of the reionization process can be probed by rest-frame UV absorption
spectra of quasars at z≳ 6, shedding light on the properties of the diffuse intergalactic …

We present measurements of black hole masses and Eddington ratios (λ Edd) for a sample
of 38 bright (M 1450<− 24.4 mag) quasars at 5.8≲ z≲ 7.5, derived from Very Large …

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 …

Luminous quasars at $ z\gt 5.6$ can be studied in detail with the current generation of
telescopes and provide us with unique information on the first gigayear of the universe. Thus …

Physical Properties of 15 Quasars at z ≳ 6.5 - IOPscience This site uses cookies. By continuing
to use this site you agree to our use of cookies. To find out more, see our Privacy and Cookies …

High-redshift quasi-stellar object (QSO) spectra show large spatial fluctuations in the Ly α
opacity of the intergalactic medium on surprisingly large scales at≳ 5.5. We present a …