Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-03-29
Astronomy and Astrophysics
Astrophysics
6 pages, 4 figures, to appear in Proc. of IAU Colloq. 195: "Outskirts of Galaxy Clusters: Intense Life in the Suburbs", ed. A.
Scientific paper
10.1017/S1743921304000390
We are using VIMOS to conduct a wide-field spectroscopic survey covering fields of 0.5 x 0.5 sqdeg around the X-ray luminous clusters of galaxies Abell 1689 (z = 0.185) and Abell 1835 (z = 0.25). Here we describe the observations and first results on the redshift distribution of subsamples of cluster galaxies to R~22 for which we at present have obtained secure redshifts. These subsamples constitute ~40% of the total spectroscopic sample and contain 525 and 630 cluster members in Abell 1689 and Abell 1835, respectively, placing them amongst the largest redshift samples available for any cluster of galaxies.
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