Why are we still using 3D masses for cluster cosmology?

• Published in: arXiv.org
• Main Authors: Debackere, Stijn N B, Hoekstra, Henk, Schaye, Joop, Heitmann, Katrin, Habib, Salman
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 14.06.2022
• Subjects: Apertures; Cosmology; Density; Emulators; Galactic clusters; Galaxies; Gaussian process; Physics - Cosmology and Nongalactic Astrophysics; Red shift; Uncertainty

The abundance of clusters of galaxies is highly sensitive to the late-time evolution of the matter distribution, since clusters form at the highest density peaks. However, the 3D cluster mass cannot be inferred without deprojecting the observations, introducing model-dependent biases and uncertainti...