Speaker
Mr
Alexander Bonilla Rivera
(Fundación Universidad Autónoma de Colombia)
Description
We use the most recent observational data from CMB (Plank 13 + WMAP 9) and LSS (SDSS, WiggleZ, 6dFGRS, 2dFGRS), to put cosmological constraints on different dark energy models (LCDM, wCDM, CPL, IDE, EDE). The CMB Shift Parameter is used as cosmological test to probe the cosmic expansion from the time of decoupling (foton-hadron, z-1090). Moreover, under the assumption that general relativity is the correct theory of gravity, we use the Linear Growth Factor Structure (D+) as cosmological test, through of the Growth Rate Data g(a)=aDo(a)/D(a) and Growth Parameter Aobs(z) = f(z)Sig8(z). As complementary tests we use Mass Gas Fracction (fgas) and SNIa (Union2.0). The cosmological models are based on paradigm of dark energy, in which this strange energy density is responsible for the accelerated expansion of the universe. We study the expansion history trougth of different probes as: deceleration parameter q(z), Om(z) diagnostic and evolution of DE(z), where we found that at low redshift appears an anomalous behavior of slowdown, which occurs in models with evolution of dark energy density with redshift. The same time we simulate the growth structure with Gadget2 to different values of cosmological parameters to each model, where we can study the evolution of the structure at low redshift.
Primary authors
Mr
Alexander Bonilla Rivera
(Fundación Universidad Autónoma de Colombia)
Mr
Jorge Garcia Farieta
(Universidad Nacional de Colombia)
