81 citations · 363 across the 10 of their papers we have counts for
12 papers
Constraining the density distribution of the cold Circumgalactic Medium of quasars at z>2 through Lya, HeII and Ha emission
Andrea Travascio, Sebastiano Cantalupo, Titouan Lazeyras +16
Extended Lya emission is routinely detected around high-redshift quasars, revealing large reservoirs of cool circumgalactic medium (CGM). Its resonant nature complicates interpreta…
Resolving the physics of Quasar Ly Nebulae (RePhyNe): II. The dense and clumpy CGM of Quasars at 3.5
Titouan Lazeyras, Sebastiano Cantalupo, Andrea Travascio +10
The small scale density distribution of the cold circumgalactic medium (CGM) plays a central role in galaxy evolution, yet it is still poorly understood. We provide new constraints…
Assembly bias in the local PNG halo bias and its implication for constraints
Titouan Lazeyras, Alexandre Barreira, Fabian Schmidt +1
We use -body simulations to study halo assembly bias (i.e., the dependence of halo clustering on properties beyond total mass) in the density and primordial non-Gaussianity (PNG…
Cosmic voids and BAO with relative baryon-CDM perturbations
Hasti Khoraminezhad, Pauline Vielzeuf, Titouan Lazeyras +2
We study the statistics of various large-scale structure tracers in gravity-only cosmological simulations including baryons and cold dark matter (CDM) initialized with two differen…
Assembly bias in quadratic bias parameters of dark matter halos from forward modeling
Titouan Lazeyras, Alexandre Barreira, Fabian Schmidt
We use the forward modeling approach to galaxy clustering combined with the likelihood from the effective-field theory of large-scale structure to measure assembly bias, i.e. the d…
Galaxy bias from forward models: linear and second-order bias of IllustrisTNG galaxies
Alexandre Barreira, Titouan Lazeyras, Fabian Schmidt
We use field-level forward models of galaxy clustering and the EFT likelihood formalism to study, for the first time for self-consistently simulated galaxies, the relations between…
Quantifying the impact of baryon-CDM perturbations on halo clustering and baryon fraction
Hasti Khoraminezhad, Titouan Lazeyras, Raul E. Angulo +2
Baryons and cold dark matter (CDM) did not comove prior to recombination. This leads to differences in the local baryon and CDM densities, the so-called baryon-CDM isocurvature per…
The impact of massive neutrinos on halo assembly bias
Titouan Lazeyras, Francisco Villaescusa-Navarro, Matteo Viel
Using the publicly available Quijote simulations, we present the first measurements of the assembly bias of dark matter halos in N-body simulations which include massive neutrinos.…
Beyond LIMD bias: a measurement of the complete set of third-order halo bias parameters
Titouan Lazeyras, Fabian Schmidt
We present direct measurements of cubic bias parameters of dark matter halos from the halo-matter-matter-matter trispectrum. We measure this statistic efficiently by cross-correlat…
Large-scale assembly bias of dark matter halos
Titouan Lazeyras, Marcello Musso, Fabian Schmidt
We present precise measurements of the assembly bias of dark matter halos, i.e. the dependence of halo bias on other properties than the mass, using curved "separate universe" N-bo…
Verifying the consistency relation for the scale-dependent bias from local primordial non-Gaussianity
Matteo Biagetti, Titouan Lazeyras, Tobias Baldauf +2
We measure the large-scale bias of dark matter halos in simulations with non-Gaussian initial conditions of the local type, and compare this bias to the response of the mass functi…
Lagrangian bias of generic large-scale structure tracers
Titouan Lazeyras, Marcello Musso, Vincent Desjacques
The dark matter halos that host galaxies and clusters form out of initial high-density patches, providing a biased tracer of the linear matter density field. In the simplest local…