Submillimeter Imaging of Rcsj022434-0002.5: Intense Activity in a High Redshift Cluster?
نویسندگان
چکیده
We present deep 850μm imaging of the z=0.773 strong lensing galaxy cluster RCSJ022434-0002.5 from the Red-Sequence Cluster Survey (RCS). These data are part of a larger submillimeter survey of RCS clusters, with SCUBA on the JCMT. We find five objects at 850μm, all of which are also detected at either 1.4-GHz, 450μm or both. The number density of objects in this field is in general agreement with the blank-field source counts; however, when combined with other cluster surveys a general tendency of cluster fields towards higher submm number densities is seen, which may be the result of unrecognized submillimeter luminous cluster galaxies. Primarily employing optical photometric redshifts we show that two of the five submillimeter galaxies in this field are consistent with being cluster members, while two are more likely background systems. Subject headings: (ISM:) dust, extinction – galaxies: clusters: individual (RCSJ022434-0002.5) – galaxies: evolution – galaxies:starburst – infrared:galaxies – radio continuum: galaxies
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