3 papers
astro-ph.CO2026
Decaying Dark Matter Halo Abundance from a Revised Spherical Collapse Model
Thomas Montandon, Vivian Poulin, Oliver Hahn +2
We present a semi-analytical framework for the halo mass function (HMF) in decaying dark matter (DDM) cosmologies, in which dark matter decays into a massive daughter particle inhe…
astro-ph.CO2026
Angular bispectrum of matter number counts in cosmic structures
Thomas Montandon, Enea Di Dio, Cornelius Rampf +1
The bispectrum of galaxy number counts is a key probe of large-scale structure, offering insights into the initial conditions of the Universe, the nature of gravity, and cosmologic…
astro-ph.CO2024
Simulating the Universe from the cosmological horizon to halo scales
Thomas Montandon, Oliver Hahn, Clément Stahl
Ultra-large scales close to the cosmological horizon will be probed by the upcoming observational campaigns. They hold the promise to constrain single-field inflation as well as ge…