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  • Faculty of Design and Creative Technologies (Te Ara Auaha)
  • School of Engineering, Computer and Mathematical Sciences - Te Kura Mātai Pūhanga, Rorohiko, Pāngarau
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The MWA GLEAM 4-Jy (G4Jy) Sample

White, SV; Franzen, TMO; Wong, OI; Kapinska, AD; Riseley, C; Hancock, P; Callingham, J; Hunstead, R; Hurley-Walker, N; Wu, C; Seymour, N; Swan, J; Wayth, R; Morgan, JS; Chhetri, R; Jackson, C; Weston, S; Mauch, T
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Journal article (4.081Mb)
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http://hdl.handle.net/10292/11948
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Abstract
Powerful radio-galaxies feature heavily in our understanding of galaxy evolution. However, when it comes to studying their properties as a function of redshift and/or environment, the most-detailed studies tend to be limited by small-number statistics. During Focus Meeting 3, on "Radio Galaxies: Resolving the AGN phenomenon", SVW presented a new sample of nearly 2,000 of the brightest radio-sources in the southern sky (Dec. $<$ 30 deg). These were observed at low radio-frequencies as part of the GaLactic and Extragalactic All-sky MWA (GLEAM) Survey, which is a continuum survey conducted using the Murchison Widefield Array (MWA). This instrument is the precursor telescope for the low-frequency component of the Square Kilometre Array, and allows us to select radio galaxies in an orientation-independent way (i.e. minimising the bias caused by Doppler boosting, inherent in high-frequency surveys). Being brighter than 4 Jy at 151 MHz, we refer to these objects as the GLEAM 4-Jy (G4Jy) Sample. The G4Jy catalogue is close to being finalised, with SVW describing how multi-wavelength data have been used to determine the morphology of the radio emission, and identify the host galaxy. In addition, the MWA's excellent spectral-coverage and sensitivity to extended/diffuse emission were highlighted. Both of these aspects are important for understanding the physical mechanisms that take place within active galaxies, and how they interact with their environment.
Keywords
astro-ph.GA; astro-ph.GA; Galaxies: active; Radio continuum: galaxies; Galaxies: evolution; Galaxies: jets
Source
arXiv:1810.01226 [astro-ph.GA]
Item Type
Journal Article
Publisher
arXiv
Publisher's Version
https://arxiv.org/abs/1810.01226
Rights Statement
Creative Commons Public Domain Dedication (CC0 1.0)

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