Tuesday

I show that dark energy leaves its imprints on the density profile of cosmic voids and that their evolution can be modeled accurately. Voids represent the underdense regions of the universe and constitute the majority of its volume. With large galaxy surveys becoming available, voids emerge as a new and complementary tool to probe cosmology. The underlying cosmology of the universe affects the formation and evolution of large-scale structure, which can be examined using weak gravitational lensing. Utilizing lensing techniques can reveal the matter content of voids thus shedding light on the nature of dark energy. I aim to measure the void lensing signal in the overlapping area between the spectroscopic redshift surveys of BOSS and GAMA with the much deeper KiDS lensing survey. I calibrate the analysis with mock galaxy catalogues and lensing ray-tracing simulations. I will present preliminary results from both mock catalogues and real data.