The spatial correlation of bent-tail galaxies and galaxy clusters

• Published in: Monthly Notices of the Royal Astronomical Society
• Main Authors: O'Brien, Andrew N. (R17562), Norris, Ray P. (R17893), Tothill, Nicholas F. H. (R17058), Filipovic, Miroslav (R7673)
• Other Authors: School of Computing, Engineering and Mathematics (Host institution)
• Format: Article in Journal/Newspaper
• Language: English
• Published: U.K., Oxford University Press 2018
• Subjects: XXXXXX - Unknown; galaxies; radio continuum; South Pole; South pole
• Online Access: https://doi.org/10.1093/MNRAS/STY2642; http://handle.westernsydney.edu.au:8081/1959.7/uws:51122

We have completed a deep radio continuum survey covering 86 deg2 of the Spitzer-South Pole Telescope deep field to test whether bent-tail galaxies are associated with galaxy clusters. We present a new catalogue of 22 bent-tail galaxies and a further 24 candidate bent-tail galaxies. Surprisingly, of the eight bent-tail galaxies with photometric redshifts, only two are associated with known clusters. While the absence of bent-tail sources in known clusters may be explained by effects such as sensitivity, the absence of known clusters associated with most bent-tail galaxies casts doubt upon current models of bent-tail galaxies.