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Accepted manuscript

Evolutionary Map of the Universe (EMU): Observations of Filamentary Structures in the Abell S1136 Galaxy Cluster

Published online by Cambridge University Press:  23 May 2024

Peter. J. Macgregor*
Affiliation:
School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia Australia Telescope National Facility, CSIRO, Space and Astronomy, PO Box 76, Epping, NSW 1710, Australia
Ray P. Norris
Affiliation:
School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia Australia Telescope National Facility, CSIRO, Space and Astronomy, PO Box 76, Epping, NSW 1710, Australia
Andrew O’Brien
Affiliation:
School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia Australia Telescope National Facility, CSIRO, Space and Astronomy, PO Box 76, Epping, NSW 1710, Australia
Mohammad Akhlaghi
Affiliation:
Centro de Estudios de Física del Cosmos de Aragón (CEFCA), Unidad Asociada al CSIC, Plaza San Juan 1, 44001 Teruel, Spain
Craig Anderson
Affiliation:
Australia Telescope National Facility, CSIRO, Space and Astronomy, PO Box 76, Epping, NSW 1710, Australia National Radio Astronomy Observatory, PO Box 0, Socorro, NM87801, USA
Jordan D. Collier
Affiliation:
School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia Australia Telescope National Facility, CSIRO, Space and Astronomy, PO Box 76, Epping, NSW 1710, Australia The Inter-University Institute for Data Intensive Astronomy (IDIA), Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch, 7701, South Africa
Evan J. Crawford
Affiliation:
School of Computer, Data, and Mathematical Sciences, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
Stefan W. Duchesne
Affiliation:
International Centre for Radio Astronomy Research (ICRAR), Curtin University, Bentley, WA 6102, Australia Australia Telescope National Facility, CSIRO, Space and Astronomy, PO Box 1130, Bentley, WA 6151, Australia
Miroslav D. Filipović
Affiliation:
School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
Bärbel S. Koribalski
Affiliation:
School of Science, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia Australia Telescope National Facility, CSIRO, Space and Astronomy, PO Box 76, Epping, NSW 1710, Australia
Florian Pacaud
Affiliation:
Argelander-Institut für Astronomie, Universtät Bonn, Auf dem Hügel 71, 53121, Bonn, Germany
Thomas H. Reiprich
Affiliation:
Argelander-Institut für Astronomie, Universtät Bonn, Auf dem Hügel 71, 53121, Bonn, Germany
Christopher J. Riseley
Affiliation:
Australia Telescope National Facility, CSIRO, Space and Astronomy, PO Box 1130, Bentley, WA 6151, Australia Dipartimento di Fisica e Astronomia, Università degli Studi di Bologna, via P. Gobetti 93/2, 40129 Bologna, Italy INAF – Istituto di Radioastronomia, via P. Gobetti 101, 40129 Bologna, Italy
Lawrence Rudnick
Affiliation:
University of Minnesota, Minnesota Institute for Astrophysics, 116 Church St. SE, Minneapolis, MN 55455 USA
Tessa Vernstrom
Affiliation:
Australia Telescope National Facility, CSIRO, Space and Astronomy, PO Box 1130, Bentley, WA 6151, Australia ICRAR, The University of Western Australia, 35 Stirling Hw, 6009 Crawley, Australia
Andrew. M. Hopkins
Affiliation:
Australian Astronomical Optics, Macquarie University, 105 Delhi Rd, North Ryde, NSW 2113, Australia
Melanie Johnston-Hollitt
Affiliation:
Curtin Institute for Data Science, Curtin University, Perth, GPO Box U1987, WA 6845, Australia
Josh Marvil
Affiliation:
National Radio Astronomy Observatory, PO Box 0, Socorro, NM87801, USA
Matthew Whiting
Affiliation:
Australia Telescope National Facility, CSIRO, Space and Astronomy, PO Box 76, Epping, NSW 1710, Australia
Steven Tingay
Affiliation:
International Centre for Radio Astronomy Research (ICRAR), Curtin University, Bentley, WA 6102, Australia
*
Author for correspondence: Peter. J. Macgregor, Email: peter.macgregor.astro@gmail.com.

Abstract

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, theWide-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.

Type
Research Article
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of the Astronomical Society of Australia

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