Optical/IR SED's for Deep Radio Fields in the Directions of Distant Rich Clusters

Details Optical/IR SED's for Deep Radio Fields in the Directions of Distant Rich Clusters Optical/IR SED's for Deep Radio Fields in the Directions of Distant Rich Clusters

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000noao.prop..179o&link_type=abstract

NOAO Proposal ID #2000B-0179

Physics

Scientific paper

We propose to obtain multi-band imaging of the fields of two distant clusters of galaxies in the the optical and near-IR to measure the spectral energy distributions (SED's) for the faint radio source population detected in deep VLA surveys over 40× 40 arcmin fields. We will use nine bands (U,B,V,R, 8010A, 9170A, J, H, K'). We will study both ID's in the cluster and along the line-of-site in front and behind the cluster. We will use these data to study the star formation rate (SFR) both in the cluster and in the general field as a function of epoch, using the radio emission as a star formation measure unaffected by dust obscuration. We will use the SED's to measure photometric redshifts, to estimate the dust obscuration, and to catalog extremely red objects (ERO's) for further study. We will also measure H(alpha)+[NII] emission near the cluster redshifts, to enhance our understanding of the Butcher-Oemler effect and the evolution of star formation in cluster environments. These fields should increase the number we have imaged from one to three (one is scheduled for June) with this technique and thus triple our sample size.

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