5 papers
Satellite galaxies in cosmological dark matter halos
Stuart P. D. Gill, Alexander Knebe, Brad K. Gibson
We present preliminary results from a series of high-resolution N-body simulations that focus on 8 dark matter halos each of order a million particles within the virial radius. We…
Filaments in Warm Dark Matter
Alexander Knebe
Using Warm Dark Matter rather then Cold Dark Matter we are able to solve the over-production of satellite galaxies orbiting in galactic haloes. Moreover, we can show that this mode…
Quantifying Substructure in Galaxy Clusters
Alexander Knebe, Volker Mueller
Substructure in galaxy clusters can be quantified with the robust Delta statistics (Dressler and Shectman 1988) which uses velocity kinematics and sky projected positions. We test…
Virialisation of Galaxy Clusters in Numerical Simulations
Alexander Knebe
Numerical simulations of variants of the CDM~model with different cosmological parameters are used to compare statistical measures such as mass spectra, merger processes, and autoc…
Properties of Galaxy Clusters
Alexander Knebe
The formation process, properties, and spatial distribution of galaxy groups and clusters are closely related to the background cosmological model. We use numerical simulations of…