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Exploring the intergalactic medium with VLT/UVES
S. Cristiani, S. Bianchi, S. D'Odorico +1
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 n…
The K20 survey. I. Disentangling old and dusty star-forming galaxies in the ERO population
A. Cimatti, E. Daddi, M. Mignoli +12
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 sp…
Measuring the Redshift Evolution of Clustering: the Hubble Deep Field South
S. Arnouts, L. Moscardini, E. Vanzella +6
We present an analysis of the evolution of galaxy clustering in the redshift interval 0<z<4.5 in the HDF-S. The HST optical data are combined with infrared ISAAC/VLT observations,…
Exploring the Lyman Forest with VLT/UVES
S. Cristiani, S. Bianchi, S. D'Odorico +1
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…
The contribution of galaxies to the UV ionising background and the evolution of the Lyman forest
Simone Bianchi, Stefano Cristiani, Tae-Sun Kim
We have modelled the evolution of the number of Ly_alpha absorbers with redshift, resulting from the evolution of the ionising background and the Hubble expansion. The contribution…
Parasitic Light in NGST instruments: the accuracy of photometric redshifts and the effect of filter leaks in the visible and near IR camera
S. Cristiani, S. Arnouts, R. A. E. Fosbury
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 der…
The Evolution of the Luminosity Function in Deep Fields: A Comparison with CDM Models
F. Poli, N. Menci, E. Giallongo +3
The galaxy Luminosity Function (LF) has been estimated in the rest frame B luminosity at 0<z<1.25 and at 1700 Å for 2.5<z<4.5 from deep multicolor surveys in the HDF-N, HDF-S, NTT-…
GRB010222: afterglow emission from a rapidly decelerating shock
N. Masetti
The GRB010222 optical and near-infrared (NIR) afterglow was monitored at the TNG and other Italian telescopes starting ~1 day after the high-energy prompt event. The optical BVR li…
The Lyman-Alpha Forest at 1.5 < z < 4
Tae-Sun Kim, Stefano Cristiani, Sandro D'Odorico
Using high resolution (R ~ 45000), high S/N (20-50) VLT/UVES observations covering the Lyman-alpha forest at 1.5 < z < 2.4 combined with similar observations at z > 2.4 from the li…