Journal article
An analysis of the halo and relic radio emission from Abell 3376 from Murchison widefield array observations
LT George, KS Dwarakanath, M Johnston-Hollitt, N Hurley-Walker, L Hindson, AD Kapińska, SJ Tingay, M Bell, JR Callingham, BQ For, PJ Hancock, E Lenc, B McKinley, J Morgan, A Offringa, P Procopio, L Staveley-Smith, RB Wayth, C Wu, Q Zheng Show all
Monthly Notices of the Royal Astronomical Society | Published : 2015
Abstract
We have carried out multiwavelength observations of the nearby (z = 0.046) rich, merging galaxy cluster Abell 3376 with the Murchison Widefield Array (MWA). As a part of the GaLactic and Extragalactic All-sky MWA Survey, this cluster was observed at 88, 118, 154, 188, and 215 MHz. The known radio relics, towards the eastern and western peripheries of the cluster, were detected at all the frequencies. The relics, with a linear extent of ~1 Mpc each, are separated by ~2 Mpc. Combining the current observations with those in the literature, we have obtained the spectra of these relics over the frequency range 80-1400 MHz. The spectra follow power laws, with α =-1.17 ± 0.06 and-1.37 ± 0.08 for th..
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Funding Acknowledgements
This scientific work makes use of the Murchison Radio-astronomy Observatory, operated by the Commonwealth Scientific and Industrial Research Organisation (CSIRO), We acknowledge the Wajarri Yamatji people as the traditional owners of the Observatory site Support for the MWA comes from the US National Science Foundation (grants AST-0457585, PHY-0835713, CAREER 0847753 and AST-0908884), the Australian Research Council (LIEF grants LE0775621 and LE0882938), the US Air Force Office of Scientific Research (grant FA9550-0510247), and the Centre for All-sky Astrophysics (an Australian Research Council Centre of Excellence funded by grant CE110001020). Support is also provided by the Smithsonian Astrophysical Observatory, the MIT School of Science, the Raman Research Institute, the Australian National University, and the Victoria University of Wellington (via grant MED-E1799 from the New Zealand Ministry of Economic Development and an IBM Shared University Research Grant). The Australian Federal government provides additional support via CSIRO, National Collaborative Research Infrastructure Strategy, Education Investment Fund, and the Australia India Strategic Research Fund, and Astronomy Australia Limited, under contract to Curtin University. We acknowledge the iVEC Petabyte Data Store, the Initiative in Innovative Computing and the CUDA Center for Excellence sponsored by NVIDIA at Harvard University, and the International Centre for Radio Astronomy Research (ICRAR), a Joint Venture of Curtin University and The University of Western Australia, funded by the Western Australian State government.