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Environmental effects in the interaction and merging of galaxies in zCOSMOS
P. Kampczyk, S. J. Lilly, L. de Ravel +56
(Abridged) We analyze the environments and galactic properties (morphologies and star-formation histories) of a sample of 153 close kinematic pairs in the redshift range 0.2 < z <…
GMASS ultradeep spectroscopy of galaxies at z ~ 2 - VII. Star formation, extinction, and gas outflows from UV spectra
M. Talia, M. Mignoli, A. Cimatti +13
We use rest-frame UV spectroscopy to investigate the properties related to large-scale gas outflows, and to the dust extinction and star-formation rates of a sample of z ~ 2 star-f…
Euclid Definition Study Report
R. Laureijs, J. Amiaux, S. Arduini +216
Euclid is a space-based survey mission from the European Space Agency designed to understand the origin of the Universe's accelerating expansion. It will use cosmological probes to…
X-ray Groups of Galaxies at 0.5<z<1 in zCOSMOS: Increased AGN Activities in High Redshift Groups
M. Tanaka, A. Finoguenov, S. J. Lilly +48
We present a photometric and spectroscopic study of galaxies at 0.5<z<1 as a function of environment based on data from the zCOSMOS survey. There is a fair amount of evidence that…
The zCOSMOS-SINFONI Project I: Sample Selection and Natural-Seeing Observations
Chiara Mancini, Natascha Foerster Schreiber, Alvio Renzini +21
The zCOSMOS SINFONI project is aimed at studying the physical and kinematical properties of a sample of massive z~1.4-2.5 star-forming galaxies, through SINFONI near-IR integral fi…
The impact of galaxy interactions on AGN activity in zCOSMOS
J. D. Silverman, P. Kampczyk, K. Jahnke +52
Close encounters between galaxies are expected to be a viable mechanism, as predicted by numerical simulations, by which accretion onto supermassive black holes can be initiated. T…
Dissecting Photometric redshift for Active Galactic Nuclei using XMM- and Chandra-COSMOS samples
M. Salvato, O. Ilbert, G. Hasinger +61
With this paper, we release accurate photometric redshifts for 1692 counterparts to Chandra sources in the central square degree of the COSMOS field. The availability of a large tr…
The evolution of quiescent galaxies at high redshift (z > 1.4)
H. Domínguez Sánchez, F. Pozzi, C. Gruppioni +45
We have studied the evolution of high redshift quiescent galaxies over an effective area of ~1.7 deg^2 in the COSMOS field. Galaxies have been divided according to their star-forma…
On the nature of the absorber in IRAS 09104+4109: the X-ray and mid-infrared view
C. Vignali, E. Piconcelli, G. Lanzuisi +8
We present a long (~76 ks) Chandra observation of IRAS 09104+4109, a hyper-luminous galaxy, optically classified as a Type 2 AGN hosted in a cD galaxy in a cluster at z=0.442. We a…
Discovery Of Cold, Pristine Gas Possibly Accreting Onto An Overdensity Of Star-Forming Galaxies At Redshift z ~ 1.6
Mauro Giavalisco, Eros Vanzella, Sara Salimbeni +12
We report the discovery of large amounts of cold (T ~ 10^4 K), chemically young gas in an overdensity of galaxies at redshift z ~ 1.6 in the Great Observatories Origins Deep Survey…
The radial and azimuthal profiles of Mg II absorption around 0.5 < z < 0.9 zCOSMOS galaxies of different colors, masses and environments
R. Bordoloi, S. J. Lilly, C. Knobel +50
We map the radial and azimuthal distribution of Mg II gas within 200 kpc (physical) of 4000 galaxies at redshifts 0.5 < z < 0.9 using co-added spectra of more than 5000 background…
Black hole accretion and host galaxies of obscured quasars in XMM-COSMOS
V. Mainieri, A. Bongiorno, A. Merloni +61
We explore the connection between black hole growth at the center of obscured quasars selected from the XMM-COSMOS survey and the physical properties of their host galaxies. We stu…
The zCOSMOS redshift survey : Influence of luminosity, mass and environment on the galaxy merger rate
L. de Ravel, P. Kampczyk, O. Le Fèvre +56
The contribution of major mergers to galaxy mass assembly along cosmic time is an important ingredient to the galaxy evolution scenario. We aim to measure the evolution of the merg…
A low escape fraction of ionizing photons of L>L* Lyman break galaxies at z=3.3
K. Boutsia, A. Grazian, E. Giallongo +12
We present an upper limit for the relative escape fraction (f_{esc}^{rel}) of ionizing radiation at z~3.3 using a sample of 11 Lyman Break Galaxies (LBGs) with deep imaging in the…
The Population of High Redshift AGNs in the Chandra COSMOS survey
F. Civano, M. Brusa, A. Comastri +19
We present the high redshift (3<z<5.3) 0.5-2 keV number counts and the 2-10 keV (rest frame) space density of X-ray selected AGNs detected in the Chandra COSMOS survey. The sample…