4 papers · 1 filter
Tracing the evolution of massive galaxies up to z \sim 3
M. Longhetti, P. Saracco, S. Cristiani +4
A census of massive galaxies at redshift increasingly higher than 1 may provide strong constraints on the history of mass assembly and of star formation. Here we report on t…
The TESIS project: revealing massive early-type galaxies at z>1
P. Saracco, M. Longhetti, P. Severgnini +8
We present the preliminary results of an on-going near-IR low resolution spectroscopic follow-up of a complete sample of 30 bright (K'<18.5) EROs selected over 360 arcmin^2 from th…
Interpreting the optical data of the Hubble Deep Field South: colors, morphological number counts and photometric redshifts
M. Volonteri, P. Saracco, G. Chincarini +1
We present an analysis of the optical data of the Hubble Deep Field South. We derive F300W(AB), F450W(AB), F606W(AB) and F814W(AB) number counts for galaxies in all four bands. The…
GRB 990510: linearly polarized radiation from a fireball
S. Covino, D. Lazzati, G. Ghisellini +12
Models for gamma-ray burst afterglows envisage an hyper-relativistic fireball that is decelerated in the ambient medium around the explosion site. This interaction produces a shock…