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 …

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 JWST/NIRSpec R≃ 2700 spectra of four high-redshift quasars: VDES J0020–
3653 (z= 6.860), DELS J0411–0907 (z= 6.825), UHS J0439+ 1634 (z= 6.519), and ULAS …

We report the identification of 64 new candidates of compact galaxies, potentially hosting
faint quasars with bolometric luminosities of L bol= 10 43–10 46 erg s− 1, residing in the …

We present the selection of high-redshift (z≳ 5.7) radio-loud (RL) quasi-stellar object (QSO)
candidates from the combination of the radio Rapid ASKAP Continuum Survey (RACS; at …

Quasars experiencing strong lensing offer unique viewpoints on subjects related to the
cosmic expansion rate, the dark matter profile within the foreground deflectors, and the …

Strongly lensed quasars provide valuable insights into the rate of cosmic expansion, the
distribution of dark matter in foreground deflectors, and the characteristics of quasar hosts …

Over the last two decades, around 300 quasars have been discovered at z≳ 6, yet only one
has been identified as being strongly gravitationally lensed. We explore a new approach …

Galactic outflows driven by rapidly-accreting quasars at high redshift are widely expected to
play a key role in the short-and long-term future evolution of their host galaxies. Using new …

We present optical and near-infrared (NIR) spectroscopic observations for a sample of $45 $
quasars at $6.50< z\leq 7.64$ with absolute magnitudes at $1450 ${\AA} in the range …