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Dynamics of pairwise motions in the Cosmic Web
Wojciech A. Hellwing
We present results of analysis of the dark matter (DM) pairwise velocity statistics in different Cosmic Web environments. We use the DM velocity and density field from the Millenni…
Nonlinear structure formation in Nonlocal Gravity
Alexandre Barreira, Baojiu Li, Wojciech A. Hellwing +2
We study the nonlinear growth of structure in nonlocal gravity models with the aid of N-body simulation and the spherical collapse and halo models. We focus on a model in which the…
Subhalo statistics of galactic halos: beyond the resolution limit
Marius Cautun, Wojciech A. Hellwing, Rien van de Weygaert +3
We study the substructure population of Milky Way (MW)-mass halos in the CDM cosmology using a novel procedure to extrapolate subhalo number statistics beyond the resolution lim…
Milky Way mass constraints from the Galactic satellite gap
Marius Cautun, Carlos S. Frenk, Rien van de Weygaert +2
We use the distribution of maximum circular velocities, , of satellites in the Milky Way (MW) to constrain the virial mass, , of the Galactic halo under an assume…
Halo model and halo properties in Galileon gravity cosmologies
Alexandre Barreira, Baojiu Li, Wojciech A. Hellwing +3
We investigate the performance of semi-analytical modelling of large-scale structure in Galileon gravity cosmologies using results from N-body simulations. We focus on the Cubic an…
A clear and measurable signature of modified gravity in the galaxy velocity field
Wojciech A. Hellwing, Alexandre Barreira, Carlos S. Frenk +2
The velocity field of dark matter and galaxies reflects the continued action of gravity throughout cosmic history. We show that the low-order moments of the pairwise velocity distr…