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Perturbation theory with dispersion and higher cumulants: non-linear regime
Mathias Garny, Dominik Laxhuber, Roman Scoccimarro
We present non-linear solutions of Vlasov Perturbation Theory (VPT), describing gravitational clustering of collisionless dark matter with dispersion and higher cumulants induced b…
Perturbation theory with dispersion and higher cumulants: framework and linear theory
Mathias Garny, Dominik Laxhuber, Roman Scoccimarro
The standard perturbation theory (SPT) approach to gravitational clustering is based on a fluid approximation of the underlying Vlasov-Poisson dynamics, taking only the zeroth and…
Squeezing out of the matter bispectrum with consistency relations
Samuel Goldstein, Angelo Esposito, Oliver H. E. Philcox +4
We show how consistency relations can be used to robustly extract the amplitude of local primordial non-Gaussianity () from the squeezed limit of the matter bispectrum,…
COMET: Clustering Observables Modelled by Emulated perturbation Theory
Alexander Eggemeier, Benjamin Camacho-Quevedo, Andrea Pezzotta +3
In this paper we present COMET, a Gaussian process emulator of the galaxy power spectrum multipoles in redshift-space. The model predictions are based on one-loop perturbation theo…
Wide-angle and relativistic effects in Fourier-space clustering statistics
Milad Noorikuhani, Roman Scoccimarro
Galaxy power spectrum and bispectrum signals are distorted by peculiar velocities and other relativistic effects arising from a perturbed spacetime background. In addition, study o…