Evolutionary Map of the Universe (EMU): observations of filamentary structures in the Abell S1136 galaxy cluster

Peter J. Macgregor*, Ray P. Norris, Andrew O’Brien, Mohammad Akhlaghi, Craig Anderson, Jordan D. Collier, Evan J. Crawford, Stefan W. Duchesne, Miroslav D. Filipović, Bärbel S. Koribalski, Florian Pacaud, Thomas H. Reiprich, Christopher J. Riseley, Lawrence Rudnick, Tessa Vernstrom, Andrew M. Hopkins, Melanie Johnston-Hollitt, Josh Marvil, Matthew Whiting, Steven Tingay

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We present radio observations of the galaxy cluster Abell S1136 at 888 MHz, using the Australian Square Kilometre Array Pathfinder radio telescope, as part of the Evolutionary Map of the Universe Early Science program. We compare these findings with data from the Murchison Widefield Array, XMM-Newton, the Wide-field Infrared Survey Explorer, the Digitised Sky Survey, and the Australia Telescope Compact Array. Our analysis shows the X-ray and radio emission in Abell S1136 are closely aligned and centered on the BCG, while the X-ray temperature profile shows a relaxed cluster with no evidence of a cool core. We find that the diffuse radio emission in the centre of the cluster shows more structure than seen in previous low-resolution observations of this source, which appeared formerly as an amorphous radio blob, similar in appearance to a radio halo; our observations show the diffuse emission in the Abell S1136 galaxy cluster contains three narrow filamentary structures visible at 888 MHz, between ∼80 and 140 kpc in length; however the properties of the diffuse emission do not fully match that of a radio (mini-)halo or (fossil) tailed radio source.

Original languageEnglish
JournalPublications of the Astronomical Society of Australia
Publication statusAccepted/In press - 2024


  • galaxies: clusters: individual: (Abell S1136)
  • radio continuum: galaxies


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