A new method of detecting high-redshift clusters

Details A new method of detecting high-redshift clusters A new method of detecting high-redshift clusters

2006-09-27

arxiv.org/abs/astro-ph/0609751v1

Astronomy and Astrophysics

Astrophysics

4 pages, to appear in proceedings of the conference "Cosmology, Galaxy Formation and Astroparticle Physics on the pathway to t

Scientific paper

We present a new cluster-finding algorithm based on a combination of the Voronoi Tessellation and Friends-Of-Friends methods. The algorithm utilises probability distribution functions derived from a photometric redshift analysis. We test our algorithm on a set of simulated cluster-catalogues and have published elsewhere its employment on UKIDSS Ultra Deep Survey infrared J and K data combined with 3.6 micro-m and 4.5 micro-m Spitzer bands and optical BVRi'z' imaging from the Subaru Telescope. This pilot study has detected clusters over 0.5 square degrees in the Subaru XMM-Newton Deep Field. The resulting cluster catalogue contains 13 clusters at redshifts 0.61 <= z <= 1.39 with luminosities 10 L* <~ L_tot <~ 50 L*.

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