Speaker
Description
On the largest scales the Universe appears to be almost perfectly
homogeneous and isotropic, adhering to the cosmological principle. On smaller scales inhomogeneities and anisotropies become increasingly prominent, reflecting the origin, emergence and formation of structure in the Universe and its cosmological impact. Also, a range of tensions between various cosmological observations may suggest it to be necessary to explore the consequences of such deviations from the ideal uniform universe. In this study, we restrict this to an investigation of anisotropies on the nature of the Universe. The geometry of homogeneous yet anisotropic cosmologies can be fully represented by the class of Bianchi metrics. According to their symmetries, they can be divided into several classes. In our recent work, we develop a method to characterize Bianchi metrics by means of their symmetries in a direct fashion, namely starting from the desired isometries and then finding a metric on which these are realized as such. This presentation will introduce Bianchi metrics, and touch upon this construction.
