High-redshift clusters from NVSS: The TexOx Cluster (TOC) Survey

Details High-redshift clusters from NVSS: The TexOx Cluster (TOC) Survey High-redshift clusters from NVSS: The TexOx Cluster (TOC) Survey

2003-01-16

arxiv.org/abs/astro-ph/0301337v1

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures. To appear in the proceedings of the conference "Radio Galaxies: Past, present and future", Leiden, 11-15 N

Scientific paper

10.1016/S1387-6473(03)00052-6

The TexOx Cluster (TOC) Survey uses overdensities of radiosources in the NVSS to trace clusters of galaxies. The links between radiosources and rich environments make this a powerful way to find clusters which may potentially be overlooked by other selection techniques. By including constraints from optical surveys, TOC is an extremely efficient way to find clusters at high redshift. One such field, TOC J0233.3+3021, contains at least one galaxy cluster (at z ~ 1.4) and has been detected using the Sunyaev-Zel'dovich (SZ) effect. Even in targetted deep optical observations, however, distinguishing the cluster galaxies from the background is difficult, especially given the tendency of TOC to select fields containing multiple structures at different redshifts.

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