Using FIRST Radio Sources to Find Galaxy Clusters

Details Using FIRST Radio Sources to Find Galaxy Clusters Using FIRST Radio Sources to Find Galaxy Clusters

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.0912w&link_type=abstract

American Astronomical Society Meeting 204, #09.12; Bulletin of the American Astronomical Society, Vol. 36, p.793

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Scientific paper

We present SDSS images of galaxy clusters found with radio sources. Using an automated pattern recognition technique, FIRST data were searched for radio sources with a specific morphology, sometimes called "bent double". Such sources are thought to represent the reaction of a double lobed radio source to an intracluster medium. We searched in the SDSS DR1 within a radius of 6 \arcmin around each bent double and retrieved photometric redshifts, five band magnitude information, and, where available, spectroscopic information for galaxies. Where photometric information such as the presence of a red sequence indicated a possible galaxy cluster, images in five bands were retrieved and inspected for overdensities of galaxies. Out of a sample of ˜ 100 bent double radio sources in the area of the SDSS DR1, approximately 10 appear to be in galaxy clusters. We discuss this selection technique relative to those of other techniques being used to identify galay clusters in the SDSS.

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