Speaker
Description
We investigate the exponential 𝑓 (𝑄) symmetric teleparallel gravitation, namely 𝑓 (𝑄) = 𝑄 + 𝛼𝑄_0(1 − 𝑒^(−𝛽√𝑄/𝑄_0)) using ME-GADGET code to probe the structure formation with box sizes 𝐿_box = 10/100 Mpc/ℎ and middle resolution 𝑁^1/3 = 512. To reproduce viable cosmology within the aforementioned modified gravity theory, we first perform Markov Chain Monte Carlo (MCMC) sampling on OHD/BAO/Pantheon datasets and constrain a parameter space. Furthermore, we also derive theoretical values for deceleration parameter 𝑞(𝑧), statefinder pair {𝑟, 𝑠} and effective gravitational constant 𝐺eff, perform 𝑂𝑚(𝑧) diagnostics. While carrying out N-body+SPH simulations, we derive CDM+baryons overdensity/temperature/mean molecular weight fields, matter power spectrum (both 2/3D, with/without redshift space distortions), bispectrum, two-point correlation function and halo mass function. Results for small and big simulation box sizes are therefore properly compared, halo mass function is related to the Seth-Tormen theoretical prediction and matter power spectrum to the standard CAMB output.
