O
Oliver Hahn
Researcher at Centre national de la recherche scientifique
Publications - 106
Citations - 7837
Oliver Hahn is an academic researcher from Centre national de la recherche scientifique. The author has contributed to research in topics: Dark matter & Halo. The author has an hindex of 36, co-authored 92 publications receiving 6798 citations. Previous affiliations of Oliver Hahn include SLAC National Accelerator Laboratory & University of Vienna.
Papers
More filters
Journal ArticleDOI
Tidal effects and the environment dependence of halo assembly
TL;DR: In this paper, the authors explore a possible origin for the puzzling anti-correlation between the formation epoch of galactic dark-matter haloes and their environment density and find that a primary driver of suppressed growth, by accretion and mergers, is tidal effects dominated by a neighbouring massive halo.
Journal ArticleDOI
Coplanar streams, pancakes and angular‐momentum exchange in high‐z disc galaxies
TL;DR: In this article, the authors studied the feeding of massive galaxies at high redshift through streams from the cosmic web using the Mare Nostrum hydrocosmological simulation and found that ∼70 per cent of the influx into the virial radius Rv is in narrow streams covering 10 per percent of Rv.
Journal ArticleDOI
The large‐scale orientations of disc galaxies
TL;DR: In this article, the authors used a hydrodynamic adaptive mesh refinement (AMR) simulation of a cosmic filament to investigate the orientations of a sample of ∼100 well-resolved galactic discs spanning two orders of magnitude in both stellar and halo mass.
Journal ArticleDOI
Mergers and mass accretion for infalling halos both end well outside cluster virial radii
Peter Behroozi,Peter Behroozi,Risa H. Wechsler,Yu Lu,Oliver Hahn,Michael T. Busha,Michael T. Busha,Anatoly Klypin,Joel R. Primack +8 more
TL;DR: In this paper, the authors show that infalling dark matter halos (i.e., the progenitors of satellite halos) begin losing mass well outside the virial radius of their eventual host halos.
Journal ArticleDOI
How to zoom: bias, contamination and Lagrange volumes in multimass cosmological simulations
Jose Oñorbe,Shea Garrison-Kimmel,Ariyeh H. Maller,Ariyeh H. Maller,James S. Bullock,Miguel Rocha,Oliver Hahn +6 more
TL;DR: In this article, a suite of multimass cosmological zoom simulations of individual dark matter halos and explore how to best select Lagrangian regions for resimulation without contaminating the halo of interest with low-resolution particles.