123 citations · 500 across the 8 of their papers we have counts for
8 papers
GenetIC -- a new initial conditions generator to support genetically modified zoom simulations
Stephen Stopyra, Andrew Pontzen, Hiranya Peiris +2
We present genetIC, a new code for generating initial conditions for cosmological N-body simulations. The code allows precise, user-specified alterations to be made to arbitrary re…
How to quench a galaxy
Andrew Pontzen, Michael Tremmel, Nina Roth +5
We show how the interplay between active galactic nuclei (AGN) and merger history determines whether a galaxy quenches star formation at high redshift. We first simulate, in a full…
Inverted initial conditions: exploring the growth of cosmic structure and voids
Andrew Pontzen, Anže Slosar, Nina Roth +1
We introduce and explore "paired" cosmological simulations. A pair consists of an A and B simulation with initial conditions related by the inversion $δ_A(x, t_{initial})=-δ_B(x,t_…
Genetically modified halos: towards controlled experiments in CDM galaxy formation
Nina Roth, Andrew Pontzen, Hiranya V. Peiris
We propose a method to generate `genetically-modified' (GM) initial conditions for high-resolution simulations of galaxy formation in a cosmological context. Building on the Hoffma…
Milking the spherical cow: on aspherical dynamics in spherical coordinates
Andrew Pontzen, Justin Read, Romain Teyssier +4
Galaxies and the dark matter halos that host them are not spherically symmetric, yet spherical symmetry is a helpful simplifying approximation for idealised calculations and analys…
Constraints on primordial non-Gaussianity from 800,000 photometric quasars
Boris Leistedt, Hiranya V. Peiris, Nina Roth
We derive robust constraints on primordial non-Gaussianity (PNG) using the clustering of 800,000 photometric quasars from the Sloan Digital Sky Survey in the redshift range $0.5<z<…
Can we really measure fnl from the galaxy power spectrum?
Nina Roth, Cristiano Porciani
The scale-dependent galaxy bias generated by primordial non-Gaussianity (PNG) can be used to detect and constrain deviations from standard single-field inflation. The strongest sig…
Testing standard perturbation theory and the Eulerian local biasing scheme against N-body simulations
Nina Roth, Cristiano Porciani
We test third-order standard perturbation theory (SPT) as an approximation to non-linear cosmological structure formation. A novel approach is used to numerically calculate the thr…