Dr. Heidi Wu
Galaxy clusters are large, gravitationally bound structures, primarily consisting of stars and dark matter. These two components form different shapes, which are oriented differently. Using data from IllustrisTNG, a publicly available set of hydrodynamical simulations, we calculate the 2D shapes from the inertia tensor of these clusters. Based on shapes measured from various methods, we find the misalignment between each shape. From these misalignments, we find that alignments between shapes measured based on individual particle positions tend to be much stronger than those measured with galaxy positions. We also find that shapes measured with these galaxy positions tend to be much more round as opposed to elliptical in shape.
Linder, Kaitlyn; Wu, Heidi; and Tenneti, Ananth, "Shapes and Orientations of Galaxy Clusters" (2023). 2023 Undergraduate Research Showcase. 72.