2 papers
astro-ph.CO2026
Ultra-light axion constraints from Planck and ACT: the role of nonlinear modelling
Lauren Gaughan, Anne M. Green, Adam Moss
We study how constraints on the abundance of ultralight axions (ULAs) from cosmic microwave background (CMB) data depend on their nonlinear modelling. We focus on the axion mass ra…
astro-ph.CO2025
A Fast and Accurate Implementation of the Effective Fluid Approximation for Ultralight Axions
Adam Moss, Lauren Gaughan, Anne M. Green
We present a numerically efficient and accurate implementation of the Passaglia-Hu effective fluid approximation for ultralight axions (ULAs) within the Boltzmann code CAMB. This m…