Piero Rosati
European Southern Observatory (ESO) (Garching, Allemagne)
Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris
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| « HST/ACS Observations of the Most Distant Galaxy Clusters » |
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Piero Rosati |
| The study of the most distant galaxy clusters can provide strong constraints on formation scenarious of cosmic structure in its cold (galaxies) and hot (intra-cluster gas) phase. I will describe an on-going study of clusters in the redshift range 0.8-1.3 with a combination of VLT, HST/ACS and Chandra observations. I will show how recent Adavance Camera observations of clusters at z>1, when combined with VLT spectroscopy and deep nearIR imaging, set new constraints on the epoch and mode of formation of cluster early-type galaxies. These new ACS data also allow the mass distribution of clusters to be probed beyond redshift one using lensing techniques. I will also present deep Chandra and XMM-Newton observations of these remote systems, which extend our understanding of the evolution of physical properties and metallicity of the intra-cluster medium. |
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mercredi 10 décembre 2003 - 11:00 Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |