Using Spitzer to Detect z > 1 Galaxy Clusters

Details Using Spitzer to Detect z > 1 Galaxy Clusters Using Spitzer to Detect z > 1 Galaxy Clusters

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jrasc..99u.141m&link_type=abstract

Journal of the Royal Astronomical Society of Canada, Vol. 99, No. 4, p.141

Astronomy and Astrophysics

Astronomy

Scientific paper

The IRAC camera on board the Spitzer Space Telescope has the ability to make deep, wide-field maps of the sky in the near-infrared. IRAC will play a central role in discovering large numbers of galaxy clusters at very high redshift, and will also give a unique perspective on the evolution of their galaxy population. We have applied the cluster redsequence technique (Gladders & Yee 2000) to six square degrees of data from the CFHT Legacy Survey and the Spitzer SWIRE survey and have detected approximately 80 cluster candidates at z > 1.0. Our sample includes candidates at z = 1.85, making these by far the most distant large scale structure detected by old populations. I will present examples of these rare objects and discuss plans to discover an additional 500-1000 clusters at z > 1 using the Spitzer SWIRE survey.

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