On the Formation of the First Quasars [PDF]
Publications of the Astronomical Society of Australia, 2017 AbstractObservations of the most luminous quasars at redshiftz> 6 reveal the existence of numerous supermasssive black holes (>199M⊙) already in place about 12 billion years ago. In addition, the interstellar medium of the galaxies hosting these black holes are observed to be chemically mature systems, with metallicities (Z> Z⊙) and dust ...
Rosa, Valiante +3 more
openaire +5 more sources
The Luminosity Dependence of Quasar Clustering
, 2005 We investigate the luminosity dependence of quasar clustering, inspired by numerical simulations of galaxy mergers that incorporate black hole growth. These simulations have motivated a new interpretation of the quasar luminosity function.
Adam Lidz +8 more
core +1 more source
Quasar clustering: evidence for an increase with redshift and implications for the nature of AGNs [PDF]
, 1997 The evolution of quasar clustering is investigated with a new sample of 388 quasars with 0 ...
Bellenger R. +17 more
core +3 more sources
Philosophy Kitchen, 2021 Intervista a Mauro ...
Mauro Folci, Stefano Oliva, Guido Baggio
doaj +1 more source
Exploring Reionization-era Quasars. III. Discovery of 16 Quasars at 6.4 ≲ z ≲ 6.9 with DESI Legacy Imaging Surveys and the UKIRT Hemisphere Survey and Quasar Luminosity Function at z ∼ 6.7 [PDF]
Astrophysical Journal, 2018 This is the third paper in a series aimed at finding reionization-era quasars with the combination of DESI Legacy imaging Surveys (DELS), the Pan-STARRS1 (PS1) Survey, and near-infrared imaging surveys, such as the UKIRT Hemisphere Survey (UHS), as well ...
Feige Wang +24 more
semanticscholar +1 more source
Quasars Probing Quasars. II. The Anisotropic Clustering of Optically Thick Absorbers around Quasars [PDF]
The Astrophysical Journal, 2007 With close pairs of quasars at different redshifts, a background quasar sightline can be used to study a foreground quasar's environment in absorption. We used a sample of 17 Lyman limit systems with column density N_HI > 10^19 cm^-2 selected from 149 projected quasar pair sightlines, to investigate the clustering pattern of optically thick ...
Joseph F. Hennawi, Jason X. Prochaska
openaire +3 more sources
Discovery of spectacular quasar-driven superbubbles in red quasars
Science Advances, 2023 Quasar-driven outflows on galactic scales are a routinely invoked ingredient for galaxy formation models. We report the discovery of ionized gas nebulae surrounding three luminous red quasars at z ~ 0.4 from Gemini integral field unit observations.
Lu Shen +9 more
openaire +3 more sources
Large SDSS quasar groups and their statistical significance
, 2015 We use a volume-limited sample of quasars in the Sloan Digital Sky Survey (SDSS) DR7 quasar catalog to identify quasar groups and address their statistical significance.
Einasto, Maret +4 more
core +1 more source
Compatibility of the large quasar groups with the concordance cosmological model [PDF]
, 2016 We study the compatibility of large quasar groups with the concordance cosmological model. Large quasar groups are very large spatial associations of quasars in the cosmic web, with sizes of 50–250 h−1 Mpc.
Campusano, Luis E. +5 more
core +2 more sources
THE PAN-STARRS1 DISTANT z > 5.6 QUASAR SURVEY: MORE THAN 100 QUASARS WITHIN THE FIRST GYR OF THE UNIVERSE [PDF]
, 2016 Luminous quasars at 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 far, these studies have been statistically limited by the number of quasars known at
E. Bañados +40 more
semanticscholar +1 more source