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Back in the saddle: Large-deviation statistics of the cosmic log-density field
Cora Uhlemann, Sandrine Codis, Christophe Pichon +2
We present a first principle approach to obtain analytical predictions for spherically-averaged cosmic densities in the mildly non-linear regime that go well beyond what is usually…
Caught in the rhythm: how satellites settle into a plane around their central galaxy
Charlotte Welker, Yohan Dubois, Christophe Pichon +2
Using the cosmological hydrodynamics simulation Horizon-AGN, we investigate the spatial distribution of satellite galaxies relative to their central counterpart in the redshift ran…
Modeling Lyman-α Forest Cross-Correlations with LyMAS
Cassandra Lochhaas, David H. Weinberg, Sébastien Peirani +6
We use the Ly- Mass Association Scheme (LyMAS; Peirani et al. 2014) to predict cross-correlations at between dark matter halos and transmitted flux in the Ly- forest,…
Peak exclusion, stochasticity and convergence of perturbative bias expansions in 1+1 gravity
Tobias Baldauf, Sandrine Codis, Vincent Desjacques +1
The Lagrangian peaks of a 1D cosmological random field representing dark matter are used as a proxy for a catalogue of biased tracers in order to investigate the small-scale exclus…
Secular diffusion in discrete self-gravitating tepid discs II: accounting for swing amplification via the matrix method
Jean-Baptiste Fouvry, Christophe Pichon, John Magorrian +1
The secular evolution of an infinitely thin tepid isolated galactic disc made of a finite number of particles is investigated using the inhomogeneous Balescu-Lenard equation expres…
Intrinsic alignments of galaxies in the Horizon-AGN cosmological hydrodynamical simulation
Nora Elisa Chisari, Sandrine Codis, Clotilde Laigle +7
The intrinsic alignments of galaxies are recognised as a contaminant to weak gravitational lensing measurements. In this work, we study the alignment of galaxy shapes and spins at…