Building a Sample of Distant Clusters of Galaxies

Details Building a Sample of Distant Clusters of Galaxies Building a Sample of Distant Clusters of Galaxies

1999-12-03

arxiv.org/abs/astro-ph/9912067v1

Astronomy and Astrophysics

Astrophysics

To appear in "Large Scale Structure in the X-ray Universe", ed. M. Plionis and I. Georgantopoulos (Paris: Editions Frontieres)

Scientific paper

Candidate clusters of galaxies drawn from the sample identified from the moderately deep I-band data of the ESO Imaging Survey (EIS), have been used for follow-up optical/infrared imaging and spectroscopic observations. The observations were conducted to assess the nature of these candidates over a large range of redshifts. Currently, 163 EIS candidates have (V-I) colors, 15 have (I-K) and 65 cluster fields have been observed spectroscopically. From a preliminary analysis of these data, we find that > 65% of the candidates studied show strong evidence of being real physical associations, over the redshift range 0.20.6, and six candidates in the interval 0.45

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