Castellano, M., Fontana, A., Boutsia, K., Grazian, A., Pentericci, L., Bouwens, R., ...
We perform a deep search for galaxies in the redshift range 6.5
Deep U band and R imaging of GOODS-South: Observations,data reduction and first results (2009)
Nonino, M., Dickinson, M., Rosati, P., Grazian, A., Reddy, N., Cristiani, S., ...
We present deep imaging in the {\em U} band covering an area of 630 arcmin$^{2}$ centered on the southern field of the Great Observatories Origins Deep Survey (GOODS). The data were obtained with the...
Star formation and mass assembly in high redshift galaxies (2009)
Santini, P., Fontana, A., Grazian, A., Salimbeni, S., Fiore, F., Fontanot, F., ...
We study the star formation and the mass assembly process of 0.31.5, but they systematically underpredict the average SSFR.
A Comprehensive Study of Large Scale Structures in the GOODS-SOUTH Field up to z \sim 2.5 (2009)
Salimbeni, S., Castellano, M., Pentericci, L., Trevese, D., Fiore, F., Grazian, A., ...
The aim of this paper is to identify and study the properties and galactic content of groups and clusters in the GOODS-South field up to z\sim2.5, and to analyse the physical properties of galaxies...
SPACE: the spectroscopic all-sky cosmic explorer (2009)
Cimatti, A., Robberto, M., Baugh, C., Beckwith, S. V. W., Content, R., Daddi, E., ...
We describe the scientific motivations, the mission concept and the instrumentation of SPACE, a class-M mission proposed for concept study at the first call of the ESA Cosmic-Vision 2015–2025...
E. Vanzella, S. Cristiani, S. Arnouts, M. Dennefeld, A. Fontana, A. Grazian, ...
Abstract. We report on low-resolution multi-object spectroscopy of 65 objects from I(AB) � 20 to I(AB) � 25 in the HDF-S obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS2)....
Vanzella, E., Giavalisco, M., Dickinson, M., Cristiani, S., Nonino, M., Kuntschner, H., ...
We report on observations of Lyman-break galaxies (LBGs) selected from the Great Observatories Origins Deep Survey at mean redshift z~4, 5 and 6, obtained with FORS2 spectrograph at the ESO-VLT.This...
The Fraction of Quiescent Massive Galaxies in the Early Universe (2009)
Fontana, A., Santini, P., Grazian, A., Pentericci, L., Fiore, F., Castellano, M., ...
Aims: The aim of this work is to collect a complete, mass--selected sample of galaxies with very low specific star formation rate, for a comparison with the prediction of recent theoretical models....
The great observatories origins deep survey: VLT/VIMOS spectroscopy in the GOODS-south field (2009)
Popesso, P., Dickinson, M., Nonino, M., Vanzella, E., Daddi, E., Fosbury, R. A. E., ...
The QSO proximity effect at redshift =2.6 with the FLO approach (2008)
D'Odorico, V., Bruscoli, M., Saitta, F., Fontanot, F., Viel, M., Cristiani, S., ...
We revisit the proximity effect produced by QSOs at redshifts 2.1-3.3 applying the FLO approach (Saitta et al. 2008) to a sample of ~6300 Ly-alpha lines fitted in 21 high resolution, high...
The Great Observatories Origins Deep Survey. VLT/VIMOS Spectroscopy in the GOODS-South Field (2008)
Popesso, P., Dickinson, M., Nonino, M., Vanzella, E., Daddi, E., Fosbury, R. A. E., ...
We present the first results of the VIsible Multiobject Spectrograph (VIMOS) ESO/GOODS program of spectroscopy of faint galaxies in the Chandra Deep Field South (CDF-S). The program complements the...
Liske, J., Pasquini, L., Bonifacio, P., Bouchy, F., Carswell, R. F., Cristiani, S., ...
CODEX and ESPRESSO are concepts for ultra-stable, high-resolution spectrographs at the E-ELT and VLT, respectively. Both instruments are well motivated by distinct sets of science drivers. However,...
Cosmic dynamics in the era of Extremely Large Telescopes (2008)
Liske, J., Grazian, A., Vanzella, E., Dessauges, M., Viel, M., Pasquini, L., ...
The redshifts of all cosmologically distant sources are expected to experience a small, systematic drift as a function of time due to the evolution of the Universe's expansion rate. A measurement of...
Large Scale Structures at High Redshift in the GOODS Field (2008)
Castellano, M., Salimbeni, S., Trevese, D., Pentericci, L., Grazian, A., Fontana, A., ...
We present a catalogue of overdensities in the GOODS-South field. We find various high density peaks that are embedded in structures diffused on the entire field, up to z ~ 2.5. The slope of their...
Rauch, M., Haehnelt, M., Bunker, A., Becker, G., Marleau, F., Graham, J., ...
Original article can be found at: http://www.iop.org/EJ/journal/apj Copyright American Astronomical Society DOI: 10.1086/525846 [Full text of this article is not available in the UHRA]
The quasar proximity effect at redshift ~= 2.6 with the From Lines to Overdensities approach (2008)
D'Odorico, V., Bruscoli, M., Saitta, F., Fontanot, F., Viel, M., Cristiani, S., ...
We revisit the proximity effect produced by quasars (QSOs) at redshifts 2.1-3.3 applying the From Lines to Overdensities (FLO) approach to a sample of ~6300 Lyalpha lines fitted in 21 high...
The CODEX-ESPRESSO experiment: cosmic dynamics, fundamental physics, planets and much more.. (2007)
Cristiani, S., Avila, G., Bonifacio, P., Bouchy, F., Carswell, B., D'Odorico, S., ...
CODEX, a high resolution, super-stable spectrograph to be fed by the E-ELT, the most powerful telescope ever conceived, will for the first time provide the possibility of directly measuring the...
Tracing the gas at redshift 1.7-3.5 with the Lyman-alpha forest: the FLO approach (2007)
Saitta, F., D'Odorico, V., Bruscoli, M., Cristiani, S., Monaco, P., Viel, M.
[Abridged] We present FLO (From Lines to Over-densities), a new technique to reconstruct the hydrogen density field for the Lya forest lines observed in high resolution QSO spectra. The method is...
Vanzella, E., Cristiani, S., Dickinson, M., Giavalisco, M., Kuntschner, H., Haase, J., ...
Aims. We present the full data set of the spectroscopic campaign of the ESO/GOODS program in the GOODS-South field, obtained with the FORS2 spectrograph at the ESO/VLT. Method. Objects were selected...
The red and blue galaxy populations in the GOODS field: evidence for an excess of red dwarfs (2007)
Salimbeni, S., Giallongo, E., Menci, N., Castellano, M., Fontana, A., Grazian, A., ...
We study the evolution of the galaxy population up to z\sim3 as a function of its colour properties. In particular, luminosity functions and luminosity densities have been derived as a function of...
A Photometrically Detected Forming Cluster of Galaxies at Redshift 1.6 in the GOODS Field (2007)
Castellano, M., Salimbeni, S., Trevese, D., Grazian, A., Pentericci, L., Fiore, F., ...
We report the discovery of a localized overdensity at z~1.6 in the GOODS-South Field, presumably a poor cluster in the process of formation. The three-dimensional galaxy density has been estimated on...
Fontanot, F., Cristiani, S., Monaco, P., Nonino, M., Vanzella, E., Brandt, W. N., ...
Aims.In this work the luminosity function of QSOs is measured in the redshift range 3.5
Lyman Break Galaxies in the VLT/FORS2 spectroscopic campaign in the GOODS-S field (2006)
Vanzella, E., Cristiani, S., Dickinson, M., Giavalisco, M., Lee, K., Nonino, M., ...
We present initial results from our ongoing campaign of spectroscopic identifications of Lyman--break galaxies (LBGs) at z ~ 4, 5 and 6 with FORS2 at the ESO VLT. The sample of LBGs is selected from...
Tomography of the intergalactic medium with Ly alpha forests in close QSO pairs (2006)
D’Odorico, V., Viel, M., Saitta, F., Cristiani, S., Bianchi, S., Boyle, B., ...
We study the three-dimensional distribution of non-virialized matter at z similar to 2 using high-resolution spectra of quasi-stellar object (QSO) pairs and simulated spectra drawn from cosmological...
Fontana, A., Salimbeni, S., Grazian, A., Giallongo, E., Pentericci, L., Nonino, M., ...
The goal of this work is to measure the evolution of the Galaxy Stellar Mass Function and of the resulting Stellar Mass Density up to redshift ~4, in order to study the assembly of massive galaxies...
The Luminosity Function of high-redshift QSOs - A combined analysis of GOODS and SDSS (2006)
Fontanot, F., Cristiani, S., Monaco, P., Nonino, M., Vanzella, E., Brandt, W. N., ...
Aims: In this work the luminosity function of QSOs is measured in the redshift range 3.5
Tomography of the intergalactic medium with Ly-alpha forests in close QSO pairs (2006)
D'Odorico, V., Viel, M., Saitta, F., Cristiani, S., Bianchi, S., Boyle, B., ...
We study the three-dimensional distribution of non virialised matter at z~2 using high resolution spectra of QSO pairs and simulated spectra drawn from cosmological hydrodynamical simulations. We...
High-z massive galaxies in the HDF-South (2006)
Saracco, P., Longhetti, M., Giallongo, E., Arnouts, S., Cristiani, S., D'Odorico, S., ...
[abr] We report the analysis of three galaxies selected in the Hubble Deep Field South at Ks3. We have used population synthesis models to constrain their redshifts and their stellar masses. One...
Vanzella, E., Cristiani, S., Fontana, A., Nonino, M., Arnouts, S., Giallongo, E., ...
We present a technique for the estimation of photometric redshifts based on feed-forward neural networks. The Multilayer Perceptron (MLP) Artificial Neural Network is used to predict photometric...
On the radio properties of the highest redshift quasars (2006)
Cirasuolo, M., Magliocchetti, M., Gentile, G., Celotti, A., Cristiani, S., Danese, L.
We present deep radio observations of the most distant complete quasar sample drawn from the Sloan Digital Sky Survey. Combining our new data with those from literature we obtain a sample which is...
Grazian, A., Fontana, A., De Santis, C., Nonino, M., Salimbeni, S., Giallongo, E., ...
We present a high quality multiwavelength (from 0.3 to 8.0 micron) catalog of the large and deep area in the GOODS Southern Field covered by the deep near-IR observations obtained with the ESO VLT....
The Clustering Evolution of Distant Red Galaxies in the GOODS-MUSIC Sample (2006)
Grazian, A., Fontana, A., Moscardini, L., Salimbeni, S., Menci, N., Giallongo, E., ...
We use the GOODS-MUSIC sample, a catalog of ~3000 Ks-selected galaxies based on VLT and HST observation of the GOODS-South field with extended multi-wavelength coverage (from 0.3 to 8 micron) and...
Vanzella, E., Cristiani, S., Dickinson, M., Kuntschner, H., Nonino, M., Rettura, A., ...
We present the second campaign of the ESO/GOODS program of spectroscopy of faint galaxies in the GOODS-South field. Objects were selected as candidates for VLT/FORS2 observations primarily based on...
Franceschini, A., Rodighiero, G., Cassata, P., Berta, S., Vaccari, M., Nonino, M., ...
We constrain the evolution of the galaxy mass and luminosity functions from the analysis of (public) multi-wavelength data in the Chandra Deep Field South (CDFS) area, obtained from the GOODS and...
Saracco, P., Fiano, A., Chincarini, G., Vanzella, E., Longhetti, M., Cristiani, S., ...
[Abridged] We present the rest-frame Js-band and Ks-band luminosity function of a sample of about 300 galaxies selected in the HDF-S at Ks
HST STIS observations of four QSO pairs (2005)
Aracil, B., Petitjean, P., Smette, A., Surdej, J., Mucket, J. P., Cristiani, S.
We present HST STIS observations of four quasar pairs with redshifts 0.84
A VLT/FORS2 spectroscopic survey in the HDF-S (2005)
Vanzella, E., Cristiani, S., Arnouts, S., Dennefeld, M., Fontana, A., Grazian, A., ...
We report on low-resolution multi-object spectroscopy of 65 objects from I(AB) ~= 20 to I(AB) ~= 25 in the HDF-S obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS2). 18 objects...
Probing 3-D matter distribution at z~2 with QSO multiple lines of sight (2005)
Cristiani, S., D'Odorico, V., Saitta, F., Viel, M., Bianchi, S., Boyle, B., ...
We investigate the 3-D matter distribution at z~2 with high resolution (R ~ 40000) spectra of QSO pairs and groups obtained with the UVES spectrograph at ESO VLT. Our sample is unique for the number...
Mignoli, M., Cimatti, A., Zamorani, G., Pozzetti, L., Daddi, E., Renzini, A., ...
The K20 survey is a near infrared-selected, deep (Ks < 20) redshift survey targeting galaxies in two independent regions of the sky, the CDFS and the q0055-2659 field. The total Ks-selected sample...
Early spitzer detections of Extreme X-ray / Optical sources (EXOs) (2005)
Koekemoer, A. M., Alexander, D. M., Bauer, F. E., Bergeron, J., Brandt, W. N., Cristiani, S., ...
EXOs: a population of dusty AGN in the early universe (2005)
Koekemoer, A. M., Alexander, D. M., Bauer, F. E., Bergeron, J., Brandt, W. N., Cristiani, S., ...
selected galaxies in the GOODS-South field ⋆,⋆⋆ (2005)
A. Grazian, A. Fontana, C. De Santis, M. Nonino, S. Salimbeni, E. Giallongo, ...
Aims. We present a high quality multiwavelength (from 0.3 to 8.0 µm) catalog of the large and deep area in the GOODS Southern Field covered by the deep near-IR observations obtained with the ESO...
The B-Band Luminosity Function of Red and Blue Galaxies up to z=3.5 (2004)
Giallongo, E., Salimbeni, S., Menci, N., Zamorani, G., Fontana, A., Dickinson, M., ...
We have explored the redshift evolution of the luminosity function of red and blue galaxies up to $z=3.5$. This was possible joining a deep I band composite galaxy sample, which includes the...
Obscured AGN and the X-ray, Optical and Far-Infrared Number Counts of AGN in the GOODS Fields (2004)
Treister, E., Urry, C. M., Chatzichristou, E., Bauer, F., Alexander, D. M., Koekemoer, A., ...
The deep X-ray, optical, and far-infrared fields that constitute GOODS are sensitive to obscured AGN (N_H>10^{22} cm^{-2}) at the quasar epoch (z~2-3), as well as to unobscured AGN as distant as z~7....
Old Galaxies in the Young Universe (2004)
Cimatti, A., Daddi, E., Renzini, A., Cassata, P., Vanzella, E., Pozzetti, L., ...
More than half of all stars in the local Universe are found in massive spheroidal galaxies, which are characterized by old stellar populations with little or no current star formation. In present...
The Great Observatories Origins Deep Survey - VLT/FORS2 Spectroscopy in the GOODS-South Field (2004)
Vanzella, E., Cristiani, S., Dickinson, M., Kuntschner, H., Moustakas, L. A., Nonino, M., ...
We present the first results of the ESO/GOODS program of spectroscopy of faint galaxies in the Chandra Deep Field South (CDF-S). 399 spectra of 303 unique targets have been obtained in service mode...
The Lyman-alpha forest according to LUQAS (2004)
Viel, M., Haehnelt, M., Carswell, B., Cristiani, S., Heavens, A., ...
We use the LUQAS sample of 27 high resolution, high signal-to-noise QSO absorption spectra (Kim et al. 2004) and the results from Croft et al. (2002) together with a suite of high-resolution...
The K20 survey. VI. The Distribution of the Stellar Masses in Galaxies up to z~2 (2004)
Fontana, A., Pozzetti, L., Donnarumma, I., Renzini, A., Cimatti, A., Zamorani, G., ...
We present a detailed analysis of the stellar mass content of galaxies up to z=2.5 in the K20 galaxy sample, that has a 92% spectroscopic completeness and a complete $UBVRIzJK_s$ multicolor coverage....
High-redshift QSOs in the GOODS (2004)
Cristiani, S., Alexander, D. M., Bauer, F., Brandt, W. N., Chatzichristou, E. T., Fontanot, F., ...
The Great Observatories Origins Deep Survey provides significant constraints on the space density of less luminous QSOs at high redshift, which is particularly important to understand the interplay...
High-z massive galaxies in the HDF-South (2004)
Saracco, P., Longhetti, M., Giallongo, E., Arnouts, S., Cristiani, S., D'Odorico, S., ...
[abr] We report the analysis of three galaxies selected in the Hubble Deep Field South at Ks3. We have used population synthesis models to constrain their redshifts and their stellar masses. One...
High-z massive galaxies in the HDF-South (2004)
Saracco, P., Longhetti, M., Giallongo, E., Arnouts, S., Cristiani, S., D'Odorico, S., ...
[abr] We report the analysis of three galaxies selected in the Hubble Deep Field South at Ks3. We have used population synthesis models to constrain their redshifts and their stellar masses. One...
The Lyman-α forest according to LUQAS (2004)
Viel, M., Haehnelt, M., Carswell, B., Cristiani, S., Heavens, A., ...
Tracing the evolution of massive galaxies up to z \sim 3 (2003)
Longhetti, M., Saracco, P., Cristiani, S., Fontana, A., Giallongo, E., Nonino, M., ...
A census of massive galaxies at redshift increasingly higher than $z\sim$1 may provide strong constraints on the history of mass assembly and of star formation. Here we report on the analysis of...
Vanzella, E., Cristiani, S., Fontana, A., Nonino, M., Arnouts, S., Giallongo, E., ...
We present a technique for the estimation of photometric redshifts based on feed-forward neural networks. The Multilayer Perceptron (MLP) Artificial Neural Network is used to predict photometric...
High-z massive galaxies in the HDF-South (2003)
Saracco, P., Longhetti, M., Giallongo, E., Arnouts, S., Cristiani, S., D'Odorico, S., ...
[abr] We report the analysis of three galaxies selected in the Hubble Deep Field South at Ks3. We have used population synthesis models to constrain their redshifts and their stellar masses. One...
The Space Density of High-Redshift QSOs in the GOODS Survey (2003)
Cristiani, S., Alexander, D. M., Bauer, F., Brandt, W. N., Chatzichristou, E. T., Fontanot, F., ...
We present a sample of 17 high-redshift (3.5
Photometric Redshifts for Galaxies in the GOODS Southern Field (2003)
Mobasher, B., Idzi, R., Benitez, N., Cimatti, A., Cristiani, S., Daddi, E., ...
We use extensive multi-wavelength photometric data from the Great Observatories Origins Deep Survey (GOODS) to estimate photometric redshifts for a sample of 434 galaxies with spectroscopic redshifts...
Color-selected galaxies at z~6 in the Great Observatories Origins Deep Survey (2003)
Dickinson, M., Stern, D., Giavalisco, M., Ferguson, H. C., Tsvetanov, Z., Chornock, R., ...
We report early results on galaxies at z~6, selected from Hubble Space Telescope imaging for the Great Observatories Origins Deep Survey. Spectroscopy of one object with the Advanced Camera for...
Viel, M., Haehnelt, M. G., Carswell, R. F., Cristiani, S.
The flux power spectra of the Lyman-alpha forest from a sample of 27 QSOs taken with the high resolution echelle spectrograph UVES on VLT are presented. We find a similar fluctuation amplitude at the...
The assembly of massive galaxies from NIR observations of the Hubble Deep Field South (2003)
Fontana, A., Donnarumma, I., Vanzella, E., Giallongo, E., Menci, N., Nonino, M., ...
We use a deep K(AB)2 form stars with an average specific rate at least ~4 x10^{-10} yr$^{-1}$, 3 times higher than the z2.
The evolution of the galaxy luminosity function in the rest frame blue band up to z=3.5 (2003)
Poli, F., Giallongo, E., Fontana, A., Menci, N., Zamorani, G., Nonino, M., ...
We present an estimate of the cosmological evolution of the field galaxy luminosity function (LF) in the rest frame 4400 Angstrom B -band up to redshift z=3.5. To this purpose, we use a composite...
A Possible New Population of Sources with Extreme X-Ray / Optical Ratios (2003)
Koekemoer, Anton M., Alexander, D. M., Bauer, F. E., Bergeron, J., Brandt, W. N., Chatzichristou, E., ...
We describe a possible new class of X-ray sources that have robust detections in ultra-deep Chandra data, yet have no detections at all in our deep multi-band GOODS Hubble Space Telescope (HST) ACS...
The K20 survey. V The evolution of the near-IR Luminosity Function (2003)
Pozzetti, L., Cimatti, A., Zamorani, G., Daddi, E., Menci, N., Fontana, A., ...
We present the galaxy rest-frame near-IR Luminosity Function (LF) and its cosmic evolution to z=1.5 based on a spectroscopic survey of a magnitude limited sample of galaxies with Ks
Vanzella, E., Cristiani, S., Fontana, A., Nonino, M., Arnouts, S., Giallongo, E., ...
We present a technique for the estimation of photometric redshifts based on feed-forward neural networks. The Multilayer Perceptron (MLP) Artificial Neural Network is used to predict photometric...
Vanzella, E., Cristiani, S., Fontana, A., Nonino, M., Arnouts, S., Giallongo, E., ...
We present a technique for the estimation of photometric redshifts based on feed-forward neural networks. The Multilayer Perceptron (MLP) Artificial Neural Network is used to predict photometric...
An ESO/VLT survey of NIR (Z (2002)
Fontana, A., Poli, F., Menci, N., Nonino, M., Giallongo, E., Cristiani, S., ...
We present the results of a VLT and HST imaging survey aimed at the identification of 4.5
A VLT/FORS2 spectroscopic survey in the HDF-S (2002)
Vanzella, E., Cristiani, S., Arnouts, S., Dennefeld, M., Fontana, A., Grazian, A., ...
We report on low-resolution multi-object spectroscopy of 65 objects from I(AB) ~= 20 to I(AB) ~= 25 in the HDF-S obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS2). 18 objects...
The All-Sky Asiago-ESO/RASS QSO Survey: Clustering and Luminosity Function (2002)
Grazian, A., Cristiani, S., Omizzolo, A.
The AERQS is a project aimed at the construction of an all-sky statistically well-defined sample of local (z < 0.3) and bright (R < 15.5) QSOs. Present uncertainties on the theoretical modeling of...
The Asiago-ESO/RASS QSO Survey II. The Southern Sample (2002)
Grazian, A., Omizzolo, A., Corbally, C., Cristiani, S., Haehnelt, M. G., Vanzella, E.
This is the second paper of a series describing the Asiago-ESO/RASS QSO survey, a project aimed at the construction of an all-sky statistically well-defined sample of very bright QSOs (B_J < 15)....
HST STIS observations of four QSO pairs (2002)
Aracil, B, Petitjean, P, Smette, A, Surdej, Jean, Mucket, JP, Cristiani, S
We present HST STIS observations of four quasar pairs with redshifts 0.84
The K20 survey. IV. The redshift distribution of Ks (2002)
Cimatti, A., Pozzetti, L., Mignoli, M., Daddi, E., Menci, N., Poli, F., ...
We present the redshift distribution of a complete sample of 480 galaxies with Ks1 and z>1.5 respectively. A ``blind'' comparison is made with the predictions of a set of the most recent LambdaCDM...
The K20 survey. III. Photometric and spectroscopic properties of the sample (2002)
Cimatti, A., Mignoli, M., Daddi, E., Pozzetti, L., Fontana, A., Saracco, P., ...
The K20 survey is an ESO VLT optical and near-infrared spectroscopic survey aimed at obtaining spectral information and redshifts of a complete sample of about 550 objects to K_s\leq20.0 over two...
HST STIS observations of four QSO pairs (2002)
Aracil, B., Petitjean, P., Smette, A., Surdej, J., Mucket, J. P., Cristiani, S.
We present HST STIS observations of four quasar pairs with redshifts 0.84
Renzini, A., Cesarsky, C., Cristiani, S., Da Costa, L., Fosbury, R., Hook, R., ...
Currently public ESO data sets pertinent to the CDFS/GOODS field are briefly illustrated along with an indication on how to get access to them. Future ESO plans for complementing the GOODS database...
Clustering at high redshift (2002)
Cristiani, S., Arnouts, S., Fontana, A., Saracco, P., Vanzella, E.
The addition of deep near infrared images to the database provided by the HDF-S WFPC2 is essential to monitor the SEDs of the objects on a wide baseline and address a number of key issues including...
A Low Upper Limit to the Lyman Continuum Emission of two galaxies at z 3 (2002)
Giallongo, E., Cristiani, S., D'Odorico, S., Fontana, A.
Long exposure, long-slit spectra have been obtained in the UV/optical bands for two galaxies at z=2.96 and z=3.32 to investigate the fraction of ionizing UV photons escaping from high redshifts...
The K20 survey. II. The Different Spatial Clustering of z~1 Old and Dusty Star-Forming EROs (2002)
Daddi, E., Cimatti, A., Broadhurst, T., Renzini, A., Zamorani, G., Mignoli, M., ...
We compare the 3D clustering of old passively-evolving and dusty star-forming z~1 EROs from the K20 survey. With detailed simulations of clustering, the comoving correlation length of dusty...
HST STIS observations of four QSO pairs (2002)
Aracil, B., Petitjean, P., Smette, A., Surdej, J., Mucket, J. P., Cristiani, S.
We present HST STIS observations of four quasar pairs with redshifts 0.84
A VLT/FORS2 spectroscopic survey in the HDF-S (2002)
Vanzella, E., Cristiani, S., Arnouts, S., Dennefeld, M., Fontana, A., Grazian, A., ...
We report on low-resolution multi-object spectroscopy of 65 objects from I(AB) ~= 20 to I(AB) ~= 25 in the HDF-S obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS2). 18 objects...
HST STIS observations of four QSO pairs (2002)
Aracil, B., Petitjean, P., Smette, A., Surdej, J., Mucket, J. P., Cristiani, S.
We present HST STIS observations of four quasar pairs with redshifts 0.84
A VLT/FORS2 spectroscopic survey in the HDF-S (2002)
Vanzella, E., Cristiani, S., Arnouts, S., Dennefeld, M., Fontana, A., Grazian, A., ...
We report on low-resolution multi-object spectroscopy of 65 objects from I(AB) ~= 20 to I(AB) ~= 25 in the HDF-S obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS2). 18 objects...
Exploring the intergalactic medium with VLT/UVES (2001)
Cristiani, S., Bianchi, S., D'Odorico, S.
The remarkable efficiency of the UVES spectrograph at the VLT has made it possible to push high-resolution, high-S/N ground observations of the Ly-a forest down to z~1.5, gaining new insight into the...
The K20 survey. I. Disentangling old and dusty star-forming galaxies in the ERO population (2001)
Cimatti, A., Daddi, E., Mignoli, M., Pozzetti, L., Renzini, A., Zamorani, G., ...
We present the results of VLT optical spectroscopy of a complete sample of 78 EROs with R-Ks\geq5 over a field of 52 arcmin^2. About 70% of the 45 EROs with Ks\leq19.2 have been spectroscopically...
Measuring the Redshift Evolution of Clustering: the Hubble Deep Field South (2001)
Arnouts, S., Moscardini, L., Vanzella, E., Colombi, S., Cristiani, S., Fontana, A., ...
We present an analysis of the evolution of galaxy clustering in the redshift interval 0
Exploring the Lyman Forest with VLT/UVES (2001)
Cristiani, S., Bianchi, S., D'Odorico, S.
A sample of 8 QSOs with 1.7 < z_em < 3.7 has been observed with VLT/UVES at a typical resolution 45000 and S/N~40-50. Thanks to the two-arm design of the spectrograph, a remarkable efficiency has...
Multicolor observations of the Hubble Deep Field South (2001)
Vanzella, E., Cristiani, S., Saracco, P., Arnouts, S., Bianchi, S., D'Odorico, S., ...
We present a deep multicolor (UBVIJsHKs) catalog of galaxies in the HDF-S, based on observations obtained with the HST WFPC2 in 1998 and VLT-ISAAC in 1999. The photometric procedures were tuned to...
Cristiani, S., Arnouts, S., Fosbury, R. A. E.
A detailed analysis of NGST multiband photometry applied to the reference case of the study of high-redshift galaxies has been carried out with simulations based on galaxy SEDs derived from the...
Saracco, P., Giallongo, E., Cristiani, S., D'Odorico, S., Fontana, A., Iovino, A., ...
We present near-IR (J and Ks) number counts and colors of galaxies detected in deep VLT-ISAAC images centered on the Chandra Deep Field and Hubble Deep Field-South for a total area of 13.6...
The Evolution of the Luminosity Function in Deep Fields: A Comparison with CDM Models (2001)
Poli, F., Menci, N., Giallongo, E., Fontana, A., Cristiani, S., Odorico, S. D'
The galaxy Luminosity Function (LF) has been estimated in the rest frame B luminosity at 0
Mining the local Universe: the QSO space density (2000)
Cristiani, S., Grazian, A., Omizzolo, A., Corbally, C.
We present progress results of a new survey for bright QSOs (V
Fontana, A., D'Odorico, S., Poli, F., Giallongo, E., Arnouts, S., Cristiani, S., ...
We present and compare in this paper new photometric redshift catalogs of the galaxies in three public fields: the NTT Deep Field, the HDF-N and the HDF-S. Photometric redshifts have been obtained...
Cristiani, S., Grazian, A., Omizzolo, A.
We present progress results of a new survey for bright QSOs (V
We report on high-resolution observations ($\Re \simeq 45000$) of the Hubble Deep Field South QSO J2233-606 obtained with the VLT UV-Visual Echelle Spectrograph (UVES). We present spectral data for...
The First VLT FORS1 spectra of Lyman-break candidates in the HDF-S and AXAF Deep Field (2000)
Cristiani, S., Appenzeller, I., Arnouts, S., Nonino, M., Aragón-Salamanca, A., Benoist, C., ...
We report on low-resolution multi-object spectroscopy of 30 faint targets (R \~ 24-25) in the HDF-S and AXAF deep field obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS1). Eight...
The Asiago-ESO/RASS QSO Survey. I.The Catalog and the Local QSO Luminosity Function (2000)
Grazian, A., Cristiani, S., D'Odorico, V., Omizzolo, A., Pizzella, A.
This paper presents the first results of a survey for bright quasars (V < 14.5 and R30. The photometric database is derived from the GSC and USNO catalogs. Quasars are identified on the basis of...
A survey of UV-excess AGNs in the South Galactic Pole (1999)
La Franca, F., Lissandrini, C., Cristiani, S., Miller, L., Hawkins, M. R. S., McGillivray, H. T.
Spectra, position, magnitudes and colors are presented for 485 faint (B
Fontana, A., Menci, N., D'Odorico, S., Giallongo, E., Poli, F., Cristiani, S., ...
A combination of ground-based (NTT and VLT) and HST (HDF-N and HDF-S) public imaging surveys have been used to collect a sample of 1712 I-selected and 319 $K\leq 21$ galaxies. Photometric redshifts...
Early Results of the ESO VLT (1999)
The results of the FORS and ISAAC Science Verification of the FORS and ISAAC instruments at the VLT ANTU/UT1 are described. The following observations have been carried out: 1) the Cluster Deep Field...
Clustering at High Redshift (1999)
Together with the CMB, the three sources of information that astronomers have at high redshift as probes of the formation and evolution of the LSS are QSOs, galaxies and absorbers observed in the...
Identification of absorbing galaxies towards the QSO J2233-606 in the Hubble Deep Field South (1998)
Tresse, L., Dennefeld, M., Petitjean, P., Cristiani, S., White, S.
We present spectroscopic observations of galaxies lying within 1' from the QSO J2233-606 in the HDF-S. Several are found to be coincident in redshift with absorption line systems seen in the HST...
Probing the Large Scale Structure with QSOs and radio-galaxies (1998)
QSOs and radio-galaxies, together with the CMB, ``normal'' galaxies and clusters, represent the main source of information about the origin and evolution of the Large Scale Structure. They can be...
The NTT Susi Deep Field (1998)
Arnouts, S., D'Odorico, S., Cristiani, S., Zaggia, S., Fontana, A., Giallongo, E.
We present a deep BVrI multicolor catalog of galaxies in a 5.62 sq.arcmin field 80 arcsec south of the high redshift (z=4.7) quasar BR 1202-0725, derived from observations with the direct CCD camera...
Giallongo, E., Fontana, A., Cristiani, S., D'Odorico, S.
The quasar Q1208+1011 (z_{em}=3.8) is the second highest redshift double quasar ever detected. Several indications point toward it being a gravitational lensed system, although a definitive proof is...
The size and geometry of the Ly_alpha clouds (1998)
D'Odorico, V., Cristiani, S., D'Odorico, S., Fontana, A., Giallongo, E., Shaver, P.
Spectra of the QSO pair Q0307-195A,B have been obtained in the Ly-alpha Forest (3660 - 3930 A) and C IV (4720 - 4850 A) regions with a FWHM resolution between 0.7 and 0.5 A. 46 lines have been...
Giallongo, E., D'Odorico, S., Fontana, A., Cristiani, S., Egami, E., Hu, E., ...
We present a deep BVrIK multicolor catalog of galaxies in the field of the high redshift (z=4.7) quasar BR 1202-0725. Reliable colors have been measured for galaxies selected down to R=25. The choice...
The luminosity function and clustering evolution of Quasars (1998)
Cristiani, S., La Franca, F., Andreani, P.
Recent results have questioned the description of the QSO luminosity function in terms of a pure luminosity evolution and call for a luminosity dependent luminosity evolution. Measurements of the QSO...
The evolution of the clustering of QSOs (1998)
La Franca, F., Andreani, P., Cristiani, S.
The evolution of QSO clustering is investigated with a new sample of 388 QSOs with 0.3
ERRATUM on The QSO evolution derived from the HBQS and other complete QSO surveys (1998)
An ESO Key programme dedicated to an Homogeneous Bright QSO Survey (HBQS) has been completed. 327 QSOs (Mb
Star-formation at z=4.7 in the environment of the QSO BR1202-07 (1998)
Fontana, A., D'Odorico, S., Giallongo, E., Cristiani, S., Monnet, G., Petitjean, P.
We present here the spectrum of the galaxy companion to the z=4.7 quasar BR1202-0725, in the optical range 6000-9000 A, corresponding to 1050-1580 A rest-frame. We detect a strong Lya emission line...
Fasano, G., Cristiani, S., Arnouts, S., Filippi, M.
We present the results of the detailed surface photometry of a sample of early-type galaxies in the Hubble Deep Field. Effective radii, surface brightnesses and total V_606 magnitudes have been...
Clustering of Absorbers (1997)
Cristiani, S., D'Odorico, S., D'Odorico, V., Fontana, A., Giallongo, E., Moscardini, L., ...
The observed clustering of Lyman-$\alpha$ lines is reviewed and compared with the clustering of CIV systems. We argue that a continuity of properties exists between Lyman-$\alpha$ and metal systems...
The Optical-UV Continuum of a Sample of QSOs (1997)
Natali, F., Giallongo, E., Cristiani, S., La Franca, F.
The average optical-UV continuum shape of QSOs has been investigated using spectra of 62 QSOs having good relative photometric calibrations. The QSO spectra were extracted from two complete color...
The UV Background and the Lyman alpha Clouds at High Redshift (1997)
Giallongo, E., Cristiani, S., D'Odorico, S., Fontana, A., Savaglio, S.
The estimate of the ionizing UV background through the proximity effect analysis is discussed. Taking into account the correct bending of the column density distribution which appears in high...
The absorption spectrum of the QSO PKS 2126-158 (z_em = 3.27) at high resolution (1997)
D'Odorico, V., Cristiani, S., D'Odorico, S., Fontana, A., Giallongo, E.
Spectra of the z_em = 3.268 quasar PKS 2126-158 have been obtained in the range lambda lambda 4300-6620 A with a resolution R = 27000 and an average signal-to-noise ratio s/n = 25 per resolution...
The optical variability of QSOs. II. The wavelength dependence (1996)
Cristiani, S., Trentini, S., La Franca, F., Andreani, P.
The long-term variability of a sample of 149 optically selected QSOs in the field of the Selected Area 94 has been studied in the R-band. The relations between variability and luminosity and between...
The clustering properties of the Lyman-alpha clouds (1996)
Cristiani, S., D'Odorico, S., D'Odorico, V., Fontana, A., Giallongo, E., Savaglio, S.
We analyze the clustering properties of a high-resolution (~10 km/s) sample of about 1600 Lyman-alpha lines in the spectra of 15 quasars, obtained in the framework of an ESO key-programme with the...
Savaglio, S., Cristiani, S., D'Odorico, S., Fontana, A., Giallongo, E., Molaro, P.
Spectra of the \ze~$=4.12$ quasar Q$0000-2619$ have been obtained in the range $\lambda\lambda = 4880-8115$ \AA~with a resolution of 13 \kms~and signal--to--noise ratio of $s/n=15-60$ per resolution...
Search for Galaxies at z>4 from a Deep Multicolor Survey (1996)
Giallongo, E., Charlot, S., Cristiani, S., D'Odorico, S., Fontana, A.
We present deep BVrI multicolor photometry in the field of the quasar BR1202-07 (z_{em}=4.694) aimed at selecting field galaxies at z>4. We compare the observed colors of the galaxies in the field...
Giallongo, E., Cristiani, S., D'Odorico, S., Fontana, A., Savaglio, S.
We present results from high resolution (R\simeq 28000) spectra of six high- redshift QSOs taken at the ESO NTT telescope that allow the detailed study of the Ly-alpha population in the redshift...
Cosmological Adventures in the Lyman Forest (1995)
The properties of the Lyman-$\alpha$ absorptions observed in the spectra of QSOs are reviewed: the distribution of column densities and Doppler widths, the redshift evolution, the ``inverse effect'',...
The Optical Variability of QSO's (1995)
Cristiani, S., Trentini, S., La Franca, F., Aretxaga, I., Andreani, P., Vio, R., ...
The long-term variability of a sample of 486 optically selected QSOs in the fields of the SA94, SA57 and SGP has been studied. The relations of variability with luminosity and redshift have been...
CLUSTERING PROPERTIES OF THE LY$\alpha$ CLOUDS (1995)
Cristiani, S., D'Odorico, S., D'Odorico, V., Fontana, A., Giallongo, E., Savaglio, S.
The spectra of the QSOs PKS2126-158 ($z_{em}=3.27$) and Q0055-269 ($z_{em}=3.66$) have been observed at high resolution ($2.2 - 2.7 \times 10^4$). Significant clustering, with $\xi \simeq 1$ at...
THE CLUSTERING OF QUASARS (1995)
Andreani, P., Cristiani, S., La Franca, F.
We have investigated the spatial distribution of quasars and its relationship with redshift by using the two-point correlation function, the variance of cell counts and the conditional density as a...
Cristiani, S., La Franca, F., Andreani, P., Gemmo, A., Goldschmidt, P., Miller, L., ...
This is the first paper in a series aimed at defining a statistically significant sample of QSOs in the range $ 15 < B < 18.75$ and $ 0.3 < z < 2.2$. The selection is carried out using direct plates...
New results on the Gunn-Peterson Effect at High Redshift (1995)
Giallongo, E., D'Odorico, S., Fontana, A., Savaglio, S., Cristiani, S., Molaro, P.
Attempts to measure the optical depth due to a diffuse intergalactic medium (IGM) in the spectra of high redshift quasars (GP test) within the ESO key program on the intergalactic medium are...
Clustering of the Lyman Alpha Clouds in the Line of Sight to the Z=3.66 QSO 0055-269 (1995)
Cristiani, S., D'Odorico, S., Fontana, A., Giallongo, E., Savaglio, S.
The spectrum of the Q0055-269 ($z=3.66$) has been observed at the resolution of 14 km s$^{-1}$ in the wavelength interval 4750--6300 \AA. The statistical distribution of the Doppler parameter for the...
On the Relationship between Optical and X-Ray Luminosity of Quasars (1994)
La Franca, F., Franceschini, A., Cristiani, S., Vio, R.
The issue of the X-ray to optical luminosity relationship ($L_o-L_x$) is addressed for both optically and X-ray selected quasar samples. We have applied a generalized regression algorithm for the...
Cristiani, S., D'Odorico, S., Fontana, A., Giallongo, E., Savaglio, S.
The spectrum of the quasar Q0055-269 ($z=3.66$) has been observed at the resolution of 14 km s$^{-1}$ in the wavelength interval 4750--6300 \AA. We give a list of Lyman$-\alpha$ lines and metal-line...
The present status of the ESO key-programme ``A Homogeneous Bright QSO Survey'' is described together with the first results concerning the QSO counts and the optical luminosity function. The related...
Sky Subtraction with Fiber-Spectrographs (1994)
Lissandrini, C., Cristiani, S., La Franca, F.
The sky subtraction performances of multi-fiber spectrographs are discussed, analysing in detail the case of the OPTOPUS system at the 3.6 meter ESO telescope at La Silla. A standard technique, based...
Giallongo, E., D'Odorico, S., Fontana, A., McMahon, R. G., Savaglio, S., Cristiani, S., ...
A measure of the average depression between Lyman absorption lines in the spectrum of the faint quasar BR1202-0725 ($z_{em}=4.695$) is presented. The relatively high resolution of the spectrum ($\sim...
The Variance of QSO Counts in Cells (1993)
Andreani, P., Cristiani, S., Lucchin, F., Matarrese, S., Moscardini, L.
{}From three quasar samples with a total of 1038 objects in the redshift range $1.0 \div 2.2$ we measure the variance $\sigma^2$ of counts in cells of volume $V_u$. By a maximum likelihood analysis...
Coordinated UV-optical observations of quasars: the evolution of the Lyman absorption (1992)
Cristiani, S., Giallongo, E., Buson, L. M., Gouiffes, C., La Franca, F.
The average flux decrement shortward the Ly$_{\alpha}$ emission, due to the well-known ``forest'' of absorptions, has been measured in the spectra of 8 quasars. Quasi-simultaneous optical and IUE...