I am a Curtin Early Career Research Fellow who helped to commission the low-frequency SKA precursor radio telescope, the Murchison Widefield Array (MWA), located in outback Western Australia. After a long day testing new receivers, I took this photo of one of the telescope’s 128 “tiles”, a novel design which replaces the more familiar dish design of higher-frequency radio telescopes:
I have been conducting a sky survey using this new radio telescope: the GaLactic and Extragalactic All-sky MWA survey, or “GLEAM” for short. It has a resolution of two arcminutes (about the same as the human eye) and spans the frequency range 72 — 231 MHz, from radio to digital TV. We have made thousands of observations of the sky, and I have used the supercomputing facilities at the Pawsey Center to calibrate the observations, produce images, and knit them together across the sky, producing this view:
You can explore the GLEAM sky and other wavelengths using the GLEAMoscope:
Using the MWA’s high surface brightness senstivity, I discovered the lowest surface-brightness radio galaxy ever detected: tenuous jets of plasma around the nearby spiral galaxy NGC 1534:
Closer to home, I used the MWA to image plasmospheric ducts in the Earth’s ionosphere, which distort our observations of distant radio galaxies, but by doing so, reveal themselves.
I also make time in my schedule to participate in science outreach, talking to kids about careers in science, popping up where least expected for Guerilla Astronomy, and in 2013 I was honoured to be invited to give a keynote speech at Astrofest, WA’s largest public astronomy event. I also talked at the Pint of Science festival in May 2016: here’s a panorama view of the pub night:
TEDx Perth Talk, October 2016:
The content of this page is maintained by Natasha Hurley-Walker, please contact them with any questions or comments on this content.