Exploring the constraints on cosmological models with CosmoEJS
  We introduce new CosmoEJS modules to improve the investigation of the
consequences of constraints on the parameter values of cosmological models. We
use CosmoMC to fit dark energy models and modified gravity models to recent
data from the cosmic microwave background measurements of the Planck satellite,
baryon acoustic oscillations, supernovae type Ia, Hubble Parameter H(z)
measurements, and redshift space distortions. While the results are in
agreement with previous constraints for these models, here, we add an
investigation into the statistical fits with CosmoEJS, an interactive Java
package of simulations that allow the user to explore the ramifications of
choosing various values for the cosmological parameters of a particular model.
We visually inspect the plots of the simulated theoretical values for
comparisons to the observational values, calculate derived cosmological values,
and finally plot the expansion history of cosmological models. These new
simulations now include modified gravity cosmological models as well as
observations of the growth of structures of galaxies for a more accurate
description of the universe's dynamics. The latest version of CosmoEJS is
available from http://www.compadre.org/osp/items/detail.cfm?ID=12406.
