3 papers
astro-ph.CO2026
Inflationary Axion Isocurvature in the CMB across All Ultralight Masses
Rayne Liu, Wayne Hu, Daniel Grin
If the Peccei-Quinn symmetry of an ultralight axion is broken before the end of inflation, axion quantum fluctuations seed isocurvature perturbations, linking them to the tensor-to…
astro-ph.CO2026
Sensitivity of Next-Generation CMB Surveys to Neutrinos and Other Light Relics
Cynthia Trendafilova, Srinivasan Raghunathan, Benjamin Wallisch +33
Neutrinos and other light relics leave characteristic imprints in the cosmic microwave background anisotropies, making their observation a sensitive probe of the particle content a…
astro-ph.CO2024
Accurate method for ultralight axion CMB and matter power spectra
Rayne Liu, Wayne Hu, Daniel Grin
Ultralight axions (ULAs) with masses are well motivated in string-inspired models and can be part or all of the dark energy or the…