Void properties in modified gravity models

Theories of modified gravity have been proposed to explain cosmic acceleration without invoking dark energy. Distinguishing modify gravity versus dark energy is one of the most important problem to address in cosmology. Significant differences between modified gravity and general relativity (GR) have to be studied in low density regions of the Universe, which lead to cosmic voids being proposed as promising test laboratory for gravity. Using N-body simulations of the f(R) model and GR, even with the same clustering of simulated galaxies, voids still have the power to distinguish them. I will present statistical analysis of void properties in these simulations, highlighting results from mark correlation functions.