5 papers · 1 filter
An XMM-Newton survey of Extremely Red Objects
M. Brusa, A. Comastri, E. Daddi +2
We present preliminary results of a 25 ks XMM-Newton observation of the largest sample of Extremely Red Objects (EROs) available to date (about 450 sources), selected in a contiguo…
The morphology of extremely red objects
G. Moriondo, A. Cimatti, E. Daddi
We present a quantitative study of the morphology of 41 Extremely Red Objects (EROs). The analysis is based on deep otical and near-infrared images from the Hubble Space Telescope…
EROs and the formation epoch of field ellipticals
E. Daddi, A. Cimatti, A. Renzini
A comparison is presented between the observed surface density of extremely red objects (EROs) and the densities of red high-z elliptical galaxies predicted by Pure Luminosity Evol…
Is the deficit of z > 1 field ellipticals real ?
E. Daddi
The results of a 700 arcmin^2 survey for EROs are presented. The sky distribution of EROs is very inhomogeneous and their two point correlation function shows a very high amplitude…
New Clues on the Nature of Extremely Red Galaxies
A. Cimatti, E. Daddi, S. di Serego Alighieri +7
We present near-infrared VLT-UT1+ISAAC spectroscopy of a sample of 9 extremely red galaxies (ERGs) with R-K>5 and K<19.0. Neither strong emission lines (F_lim<1-5 10^{-16} erg s^{-…