Speaker
Description
Due to their size and underdense structures, cosmic voids offer enhanced sensitivity to the properties of dark energy. We show that the Type 3 interacting dark energy model parameters have significant effects on the radial velocity and velocity dispersion of these voids, though the effects of the momentum coupling $\beta$ ($<0$ ) and scalar field potential parameter $\lambda$ on the radial velocity statistics are degenerate, similar to that previously reported for matter pairwise velocities in the same model. This demonstrates that the void velocity profiles provide an independent and observationally accessible probe of the dark-sector interaction in the Type 3 model. We show that the degeneracy between $\beta$ and $\lambda$ can be broken when the void velocity statistics are combined with matter pairwise velocity statistics.
