Dark Matter, Dark Energy, and Dark Flow: Galaxy motion reveals fundamental physics (2010–2014)
Galaxy motions directly trace the underlying gravitational structure of the universe. Measuring motion can
therefore reveal the nature of dark matter and dark energy, two of the biggest challenges to modern physics.
However, progress has been limited by the difficulty in measuring galactic distances. Three Australian
telescopes will soon break that impasse and measure the motion of tens of thousands of galaxies. Using
SkyMapper supernovae, and combining them with optical and radio galaxy motions, I will test whether dark
matter and dark energy are best explained by new types of particles outside the standard model of particle
physics, or whether our fundamental theory of gravity requires revision.