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<< Cosmo.TorunLSST %TOC% ---- ---+ Boudewijn Roukema "Does relativistic cosmology software handle emergent volume evolution?" https://events.ncbj.gov.pl/event/270/contributions/1343 Rubin/LSST cosmological data needs to be interpreted, by default, within the context of general relativity. However, the LCDM cosmological model is a semi-decoupled model, in which the gravitational effects of structure formation are assumed to be semi-isolated from the expansion rate of the Universe constrained by the Einstein equation: expansion affects structure formation but structure formation is assumed to have no effect on expansion. Recently developed free-licensed relativistic cosmological simulation codes offer a numerical approach to modelling both structure formation and expansion self-consistently according to the standard Einstein equation, avoiding the unphysical semi-decoupling assumption of LCDM. Whether these codes are able to model beyond-Friedmannian volume evolution needs to be calibrated. An example of calibrating the gevolution and inhomog codes to see whether numerical results match analytical exact solutions for beyond-Friedmannian volume evolution will be presented. -- Main.BoudRoukema - 19 Oct 2023
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Topic revision: r1 - 19 Oct 2023,
BoudRoukema
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