151 citations · 647 across the 14 of their papers we have counts for
14 papers
The effect of dark matter-dark radiation interactions on halo abundance -- a Press-Schechter approach
Omid Sameie, Andrew J. Benson, Laura V. Sales +3
We study halo mass functions with the Press-Schechter formalism for interacting dark matter models, where matter power spectra are damped due to dark acoustic oscillations in the e…
Precision Pollution - The effects of enrichment yields and timing on galactic chemical evolution
Pierre-Antoine Poulhazan, Cecilia Scannapieco, Peter Creasey
We present an update to the chemical enrichment component of the smoothed-particle hydrodynamics model for galaxy formation presented in Scannapieco et al. (2005) in order to addre…
Globular Clusters Formed within Dark Halos I: present-day abundance, distribution and kinematics
Peter Creasey, Laura V. Sales, Eric W. Peng +1
We explore a scenario where metal poor globular clusters (GCs) form at the centres of their own dark matter halos in the early universe before reionization. This hypothesis leads t…
Tree-less 3d Friends-of-Friends using Spatial Hashing
Peter E. Creasey
I describe a fast algorithm for the identification of connected sets of points where the point-wise connections are determined by a fixed spatial distance - a task commonly referre…
Stellar Halos in Illustris- Probing the Histories of Milky Way-Mass Galaxies
Lydia M. Elias, Laura V. Sales, Peter Creasey +4
The existence of stellar halos around galaxies is a natural prediction of the hierarchical nature of the LambdaCDM model. Recent observations of Milky Way-like galaxies have reveal…
The impact of baryonic discs on the shapes and profiles of self-interacting dark matter halos
Omid Sameie, Peter Creasey, Hai-Bo Yu +3
We employ isolated N-body simulations to study the response of self-interacting dark matter (SIDM) halos in the presence of the baryonic potentials. Dark matter self-interactions l…
Fast generation of isotropic Gaussian random fields on the sphere
Peter E. Creasey, Annika Lang
The efficient simulation of isotropic Gaussian random fields on the unit sphere is a task encountered frequently in numerical applications. A fast algorithm based on Markov propert…
Spreading out and staying sharp - Creating diverse rotation curves via baryonic and self-interaction effects
Peter Creasey, Omid Sameie, Laura V. Sales +3
Galactic rotation curves are a fundamental constraint for any cosmological model. We use controlled N-body simulations of galaxies to study the gravitational effect of baryons in a…
Properties of Galaxies in the Disc Central Surface Brightness Gap
Jenny G. Sorce, Peter Creasey, Noam I. Libeskind
Intermediate surface brightness (ISB) galaxies are less numerous than their counterparts at high and low surface brightness (HSB and LSB). Investigating ISB characteristics from a…
The Milky Way and Andromeda galaxies in a constrained hydrodynamical simulation: morphological evolution
Cecilia Scannapieco, Peter Creasey, Sebastian E. Nuza +3
We study the two main constituent galaxies of a constrained simulation of the Local Group as candidates for the Milky Way (MW) and Andromeda (M31). We focus on the formation of the…
The Effect of Environment on Milky Way-mass galaxies in a Constrained Simulation of the Local Group
Peter Creasey, Cecilia Scannapieco, Sebastian E. Nuza +3
In this letter we present, for the first time, a study of star formation rate, gas fraction and galaxy morphology of a constrained simulation of the Milky Way (MW) and Andromeda (M…
The metallicity of galactic winds
Peter Creasey, Tom Theuns, Richard G. Bower
The abundance evolution of galaxies depends critically on the balance between the mixing of metals in their interstellar medium, the inflow of new gas and the outflow of enriched g…
How supernova explosions power galactic winds
Peter Creasey, Tom Theuns, Richard G. Bower
Feedback from supernovae is an essential aspect of galaxy formation. In order to improve subgrid models of feedback we perform a series of numerical experiments to investigate how…
Numerical overcooling in shocks
Peter Creasey, Tom Theuns, Richard G. Bower +1
We present a study of cooling in radiative shocks simulated with smoothed particle hydrodynamics (SPH) and adaptive mesh refinement codes. We obtain a similarity solution for a sho…