The Pawsey Supercomputing Centre


Cosmic Web Simulation

Simulated ‘dwarf’ galaxy

Our Universe is dominated not by the material we can see but that which we can’t. By observing the motion of galaxies and the manner in which they are positioned across the sky we can infer the presence of enormous amounts of unseen material, called Dark Matter. We create model universes inside supercomputers to try to understand the way in which the galaxies trace out the underlying Dark Matter, similar to flies trapped along a giant Cosmic Web, the true face of the Universe is revealed in these simulations.

The Pawsey Supercomputing Centre’s considerable expertise and resources were used to both run simulations, as well as produce visualisations based on the raw data produced.

This image (right) shows a simulated ‘dwarf’ galaxy formed when the Universe was half its current age. The Dark Matter is in red, the stars in yellow and the gas in blue. Galaxy formation occurs along Dark Matter filaments, and is a violent process of merging of gas clouds, spawning stars deep within their sheltered cores.

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