Exploring General Relativistic Approaches to Modeling Large-Scale Structure Formation in the Universe



Delgado Gaspar, NCBJ

National Centre for Nuclear Research

June 7, 2023 12:30 PM

The current era of precision cosmology has provided us with high-quality observational data across astrophysical and cosmological scales. Interpreting these data requires robust modeling of self-gravitating systems. However, the use of exact solutions of Einstein’s equations and non-linear approaches has been less favored in examining the observations.

In this talk, we explore different relativistic approaches to model the formation of large-scale structures, with an emphasis on exact solutions and the relativistic Zeldovich approximation (RZA). We show how the dynamical freedom of the Lemaıtre–Tolman–Bondi (LTB) and Szekeres exact solutions allows for a realistic description of three-dimensional networks of cold dark matter structures. We discuss the “silent property” exhibited by these solutions and its use in developing alternative approaches. Specifically, we establish a connection between the LTB/Szekeres models and RZA, allowing us to develop a new general relativistic method. By exploring these various methods, we aim to enhance our understanding of the role of curvature and relativistic corrections in the formation of large-scale structures.

This is a hybrid event:

Onsite: Room D, the Institute of Physics PAS, the Institute of Physics PAS, Al. Lotników 32/46,

Online: Zoom https://zoom.us/j/82380380442?pwd=Z3IyeEhlZmFHU1B2M2VUVVJhODkrUT09 (Passcode: 134595, Meeting ID: 823 8038 0442)