A K-Selected Candidate Galaxy Cluster with z ~ 0.9 in the NOAO Deep Wide Field Survey

Details A K-Selected Candidate Galaxy Cluster with z ~ 0.9 in the NOAO Deep Wide Field Survey A K-Selected Candidate Galaxy Cluster with z ~ 0.9 in the NOAO Deep Wide Field Survey

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.7805d&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #78.05; Bulletin of the American Astronomical Society, Vol. 34, p.1232

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Deep near-infrared imaging is an ideal tool to search for high-redshift galaxy clusters. We have examined a one square degree patch of sky from the NOAO Deep Wide Field Survey (NDWFS) in the constellation Bootes. We used K-band data taken with the ONIS camera on the KPNO 2.1m telescope and deep B, R, and I data from the MOSAIC camera on the KPNO 4m. Several candidate clusters were found, including one with a photometric redshift of z phot ~ 0.90. This candidate includes eight K < 18.5 galaxies with photometric redshifts between 0.8 and 1.0 in a 4 square arcmin region, representing an 8.4 sigma deviation from the average surface density of such sources. Five of these galaxies, falling within a 46 arcsec diameter region, have 17.3 < K < 18 and I - K ~ 4.

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