201 citations · 538 across the 18 of their papers we have counts for
3 papers · 1 filter
Probing the nature of dark matter with Cosmic X-rays: Constraints from "Dark blobs" and grating spectra of galaxy clusters
Signe Riemer-Sorensen, Kristian Pedersen, Steen H. Hansen +1
Gravitational lensing observations of galaxy clusters have identified dark matter ``blobs'' with remarkably low baryonic content. We use such a system to probe the particle nature…
The density profiles of hot galactic halo gas
Steen H. Hansen, Jesper Sommer-Larsen
Extended gas haloes around galaxies are a ubiquitous prediction of galaxy formation scenarios. However, the density profiles of this hot halo gas is virtually unknown, although var…
An alternative to grids and glasses: Quaquaversal pre-initial conditions for N-body simulations
Steen H. Hansen, Oscar Agertz, Michael Joyce +3
N-body simulations sample their initial conditions on an initial particle distribution, which for cosmological simulations is usually a glass or grid, whilst a Poisson distribution…