Constraints on Cosmology and Gravity from the Dynamics of Voids
Nico HAMAUS, Alice PISANI, P. M. SUTTER, G.LAVAUX, S. Escoffier, B. D. WANDELT, and J. Weller
Phys. Rev. Lett. 117, 091302 2016
Relaying on an accurate model of Redshift Space Distortions and Alcock-Paczyński effect around voids,
we constrain the average matter content in the Universe today, as well as the linear growth rate of structure using DR11 data. We obtain such
achievement thanks to a percent-level measurement of the anisotropic
distortion in the void-galaxy cross-correlation function.
They surpass (and are complementary to) existing constraints by unlocking cosmological information on smaller scales
through an accurate model of nonlinear clustering and dynamics in void environments.
ArXiv PDF
Read more about voids ...