WATs In ATLAS

Details WATs In ATLAS WATs In ATLAS

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21547020m&link_type=abstract

American Astronomical Society, AAS Meeting #215, #470.20; Bulletin of the American Astronomical Society, Vol. 42, p.517

Astronomy and Astrophysics

Astronomy

Scientific paper

Wide-Angle-Tailed (WAT) radio sources are known to signpost dynamically unrelaxed or merging clusters. We present a sample of six WATs identified in the 1.4 GHz ATLAS radio survey. Two of the WATs in our sample have sufficient spectroscopic data to confirm the existence of an overdensity, or cluster associated with the WAT. In one case, the overdensity covers an unusually large area ( 12 Mpc) and has a large velocity dispersion (4500 km/s). The WATs all reside in the redshift interval (0.1 < z < 1) that appears to be a transition period between the well-understood low-redshift clusters and the higher-redshift large-scale structures.
We also discuss the implications of this for the future large-scale radio surveys planned with SKA pathfinder telescopes such as the Australian SKA Pathfinder (ASKAP) and their value in detecting large scale overdensities at high redshifts.

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