The 12th International Workshop Dark Side of the Universe

Exact Analytic Solution for Non-Linear Density Fluctuation in a LCDM Universe

26 Jul 2016, 14:45

15m

Egget auditorium in the UiB Student Center (University of Bergen)

Contributed talk Dark Energy and Modified Gravity Dark Energy and Modified Gravity

Speaker

Jinn-Ouk Gong (Asia Pacific Centerfor Theoretical Physics)

Summary

We derive the exact third-order analytic solution of the matter density fluctuation in the proper-time hypersurface in a LCDM universe, accounting for the explicit time-dependence and clarifying the relation to the initial condition. Furthermore, we compare our analytic solution to the previous calculation in the comoving gauge, and to the standard Newtonian perturbation theory by providing Fourier kernels for the relativistic effects. Our results provide an essential ingredient for a complete description of galaxy bias in the relativistic context.

Presentation materials

2016-07-26_DSU2016.pdf