Dr Tim Galvin1
The evolutionary map of the Universe (EMU) is a key science project of the ASKAP instrument – a radio telescope developed by CSIRO. Once completed it is expected that EMU will detect upwards of 70 million radio objects. Classifying these objects has traditionally been a manual process, where a human would inspect the complex radio morphology and apply a meaningful classification. Machine learning methods will become a necessary component of data pipelines if we are to successfully keep pace and extract meaningful science from these large surveys. We investigate how rotationally invariant self-organising maps may be exploited to provide a unique tool to (i) classify resolved radio features that are related, (ii) identify the host galaxy producing these radio components, and (iii) detection of anomalous radio sources. By relying on an unsupervised method there is no initial set of training labels required for this approach. We explore our initial results from applying this method on sensitive EMU data.
Tim obtained his PhD from Western Sydney University and commenced his current PostDoctoral position with CSIRO Astronomy and Space Science.