Stacking of hydrogen signals to study density over cosmic time

Dec 16, 2013

Neutral atomic hydrogen (HI), a fundamental ingredient in a galaxy, is key to our understanding of galaxy formation and evolution. Large optical surveys with ground- and space-based telescopes have allowed us to assess the physical properties of many millions...

Probing turbulence in the Inter-Galactic Medium

Dec 12, 2013

The mean number density of baryons in intergalactic space is a low 2 x 10-7 cm-3 – roughly equivalent to an office cubicle that contains only 6 protons! Yet CAASTRO Associate Investigator Dr Jean-Pierre Macquart and his colleague Dr Kevin Koay at Curtin University...

Detection of several Fast Radio Bursts per month predicted

Dec 10, 2013

Fast Radio Bursts (FRBs) are bursts of radiation observed at radio frequencies that last only a few milliseconds. The physical mechanisms for generating FRBs are unclear, but there are a lot of intriguing suggestions. What is clear is that these are very energetic...