The MWA GLEAM 4-Jy (G4Jy) Sample

Date
Authors
White, SV
Franzen, TMO
Wong, OI
Kapinska, AD
Riseley, C
Hancock, P
Callingham, J
Hunstead, R
Hurley-Walker, N
Wu, C
Supervisor
Item type
Journal Article
Degree name
Journal Title
Journal ISSN
Volume Title
Publisher
arXiv
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.

Description
Keywords
astro-ph.GA , astro-ph.GA , Galaxies: active; Radio continuum: galaxies; Galaxies: evolution; Galaxies: jets
Source
arXiv:1810.01226 [astro-ph.GA]
DOI
Rights statement
Creative Commons Public Domain Dedication (CC0 1.0)