Post-Newtonian cosmology (2020)
Type of ContentTheses / Dissertations
Degree NameBachelor of Science (Hons)
PublisherUniversity of Canterbury
In cosmology, it is common to model the universe as being close to an exact solution of Ein- stein’s equations, the homogeneous and isotropic Friedmann–Lemaˆıtre–Robertson–Walker spacetime. The inhomogeneities in the real universe that arise due to structure formation are modelled using perturbation theory in two different ways: cosmological perturbation theory and post-Newtonian theory. We review these two approaches and their assumptions and restrictions. Perturbation theory introduces a gauge freedom, but a recent work by Clifton, Gallagher, Goldberg, and Malik found that some of the well-studied gauge choices in cosmological perturbation theory are not viable in post-Newtonian theory. We discuss the gauge problem, review the paper of Clifton et al., and extend its analysis to a new set of gauges, the Machian gauges of Bičák, Katz, and Lynden-Bell.
RightsAll Rights Reserved
Showing items related by title, author, creator and subject.
Trinh, Khanh Tuoc (University of Canterbury. Chemical Engineering, 1992)Turbulence is present everywhere in our environment yet its complexities remain one of the great challenges in scientific and engineering research. This work began out of personal interest. As such, it involved all aspects ...
The Design and Evolution of TurboTurtle, a Collaborative Microworld for Exploring Newtonian Physics Cockburn, Andy; Greenberg, Saul (University of Canterbury, 1995)TurboTurtle is a dynamic multi-user microworld for the exploration of Newtonian physics. With TurboTurtle, students can alter the attributes of the simulation environment, such as gravity, friction, and presence or absence ...
Golzar F; Chase, Geoff; Rodgers G (2019)Hybrid damping devices combining different energy dissipation mechanisms can provide an overall response which can perform across a large range of near-fault and far-fault earthquakes with different frequency and velocity ...