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MPA-HOMEPAGE | ![]() |
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EDISCS:ESO Distant Clusters Survey | |
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Introduction: Large Surveys- ESO Distant Clusters Survey EDisCS aims at studying the evolution of cluster populations over more
than 50 % of cosmic time by comparing the photometric and spectroscopic
properties of galaxies in rich clusters at z~0.5 and z>0.8 with those
of galaxies in well studied nearby clusters. Our samples consist of the
most luminous objects in each redshift band in the The project runs in three phases: Phase I: Cluster confirmation. We have carried out medium depth photometry in two bands with FORS2 in order to confirm the reality and the approximate redshifts of the cluster candidates. Phase II: Deep photometry. We have obtained deep optical photometry using FORS2 at B, V and I for the 10 brightest confirmed clusters at z~0.5 and at B, R and I for the 10 brightest confirmed clusters at z~0.8. We have obtained deep near-IR photometry using SOFI on the NTT at K' for the nearer clusters and at J and K' for the more distant clusters. We expect to release the photometric data publically at the end of 2005. Phase III: Spectroscopy. We are using FORS2 to obtain spectra of possible cluster members in the 20 clusters with deep photometry. For the more massive galaxies the goal will be to obtain both stellar population and kinematic information. The first set of spectroscopy on 5 clusters was released in 2004 and we expect to realease the spectroscopic data on the rest of the clusters publically at the end of 2005. Please see the
EDisCS is being carried out by an international consortium of 25
astronomers from 6 countries. A group photo can be found
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First projects planned by consortium scientists include: Gravitational lensing, very high-z objects, galaxy counts, mass-to-light ratios, stellar population (early/late type galaxies), star formation and dust, morphologies, AGNs, scaling relations, luminosity function, cluster structure and dynamics, evolution of clusters and cluster galaxies.
Low redshift clusters(z~0.5)
High redshift clusters (0.6< z < 0.8)
Cluster cl1037 - Weak lensing mass reconstruction superposed on the I image.
Comments to: Gregory Rudnick |
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