Mass and Gravity from the Motions of Galaxies

This project will use the motions of individual galaxies (their ‘peculiar velocities’) to map the distribution of matter in the nearby universe, to measure the total amount of matter and the rate of growth of structure in the universe, and to test Einstein’s theory of gravity against alternative models. It will use two world-leading Australian peculiar velocity surveys (the WALLABY radio survey and the Taipan optical survey), as well as existing and new public datasets, to measure at least five times more galaxy motions than currently exist, to improve the precision of the measurements, and to exploit complementary types of measurements. The galaxy positions and motions from these vast new surveys will be analysed using innovative methods developed for comparing density and peculiar velocity maps, yielding more information from each dataset with greater accuracy and precision. The state-of-the-art results will be a milestone advance in observational cosmology.

See this link https://www.dropbox.com/s/xi4ux0l95es7ej2/Colless_Student_Project_2021-1.pdf?dl=0 for more details of this project. The project could accommodate two PhD students; parts of the project are suitable for Honours or Masters students.