February 3 (Fri), 14:15 in A315 (SPECIAL DAY)   

David Alonso (IFT Madrid, Spain)


Halo abundances and background shear in void models

Through numerical N-body simulations of Lemaitre-Tolman-Bondi void models we study the non-linear collapse of dark matter into halos. We extend the halo mass function formalism to these models in a consistent way. This extension not only compares well with the simulated data at all times and radii, but it also gives interesting hints about the impact of the background shear on the growth of perturbations. Furthermore, the study of the shapes and orientations of halos in these models shows specific features that could be used to constrain them further.