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QSO obscuration at high redshift (): Predictions from the BlueTides simulation
Yueying Ni, Tiziana Di Matteo, Roberto Gilli +3
High- AGNs hosted in gas rich galaxies are expected to grow through significantly obscured accretion phases. This may limit or bias their observability. In this work, we use \te…
The most luminous blue quasars at . I. A tale of two X-ray populations
E. Nardini, E. Lusso, G. Risaliti +8
(abridged) We present the X-ray analysis of a sample of 30 luminous quasars at with deep XMM-Newton observations, selected from the SDSS-DR7 to be representative o…
Testing the paradigm: First spectroscopic evidence of a quasar-galaxy Mpc-scale association at cosmic dawn
Roberto Decarli, Marco Mignoli, Roberto Gilli +9
State-of-the-art models of massive black hole formation postulate that quasars at reside in extreme peaks of the cosmic density structure in the early universe. Even so, dire…
The Chandra COSMOS Legacy Survey: clustering dependence of Type 2 AGN on host galaxy properties
V. Allevato, A. Viitanen, A. Finoguenov +10
Aims. We perform clustering measurements of 800 X-ray selected Chandra COSMOS Legacy (CCL) Type 2 AGN with known spectroscopic redshift to probe the halo mass dependence on AGN hos…
Discovery of a galaxy overdensity around a powerful, heavily obscured FRII radio galaxy at z=1.7: star formation promoted by large-scale AGN feedback?
R. Gilli, M. Mignoli, A. Peca +25
We report the discovery of a galaxy overdensity around a Compton-thick Fanaroff-Riley type II (FRII) radio galaxy at z=1.7 in the deep multiband survey around the z=6.3 QSO SDSS J1…
The X-ray properties of quasars: no evident evolution of accretion physics in the first Gyr of the Universe
Fabio Vito, William Nielsen Brandt, Franz Erik Bauer +10
X-ray emission from QSOs has been used to assess SMBH accretion properties up to ~6. However, at only ~15 QSOs are covered by sensitive X-ray observations, preventing a st…