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A high space density of L* Active Galactic Nuclei at z~4 in the COSMOS field
K. Boutsia, A. Grazian, E. Giallongo +2
Identifying the source population of ionizing radiation, responsible for the reionization of the universe, is currently a hotly debated subject with conflicting results. Studies of…
CANDELSz7: a large spectroscopic survey of CANDELS galaxies in the reionization epoch
L. Pentericci, E. Vanzella, M. Castellano +15
We present the results of CANDELSz7, an ESO large program aimed at confirming spectroscopically a homogeneous sample of z~6 and z~7 star forming galaxies. The candidates were selec…
Spectroscopic investigation of a reionized galaxy overdensity at z=7
M. Castellano, L. Pentericci, E. Vanzella +17
We present deep spectroscopic follow-up observations of the Bremer Deep Field (BDF) where the two 7 bright Ly emitters (LAE) BDF521 and BDF3299 were previously discovered…
The VANDELS ESO public spectroscopic survey: observations and first data release
L. Pentericci, R. J. McLure B. Garilli, O. Cucciati +93
This paper describes the observations and the first data release (DR1) of the ESO public spectroscopic survey "VANDELS, a deep VIMOS survey of the CANDELS CDFS and UDS fields". VAN…
The VANDELS ESO public spectroscopic survey
R. J. McLure, L. Pentericci, A. Cimatti +92
VANDELS is a uniquely-deep spectroscopic survey of high-redshift galaxies with the VIMOS spectrograph on ESO's Very Large Telescope (VLT). The survey has obtained ultra-deep optica…
The contribution of faint AGNs to the ionizing background at z~4
A. Grazian, E. Giallongo, K. Boutsia +21
Finding the sources responsible for the hydrogen reionization is one of the most pressing issues in cosmology. Bright QSOs are known to ionize their surrounding neighborhood, but t…