Thesis title: A Southern Sky Catalogue of Radio Haloes and Relics with the Murchison Widefield Array (MWA)
My main field of research is concerned with diffuse, non-thermal radio emission within and around galaxy clusters. The work I do is mostly in detection of such emission, utilising telescopes such as the MWA, the Australia Telescope Compact Array, and (in some small part!) the Australia Square Kilometre Array Pathfinder. In general, the work is done in the image plane using various source-finding techniques – both automated and in a more manual sense. Cluster haloes and relics are the two main types of sources we are interested in—thought to form from shocks and turbulence within the clusters and trace the merger history or dynamical state of the cluster. These sources are important in uncovering the nature behind cluster magnetic fields, perhaps eventually answering the question of their origin.
My MSc was completed at the beginning of 2017 under Professor Melanie Johnston-Hollitt at Victoria University of Wellington (VUW). This work made use of André Offringa’s deep MWA image of the EoR0 field (Offringa et al. 2016), which involved detecting halo and relic emission from clusters within the 45 degree by 45 degree field.
Additionally, I have worked with Dr. Stephen Curran at VUW investigating neutral hydrogen absorption profiles of distant galaxies.
Offringa A. R. et al., 2016, MNRAS, 458, 1057
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