123 citations · 500 across the 8 of their papers we have counts for
4 papers · 1 filter
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_…
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…