2 papers
astro-ph.CO2025
Improved constraints on ultralight axions using latest observations of the early and late Universe
Qianshuo Liu, Chang Feng, Filipe B. Abdalla
Ultralight axions (ULAs) are hypothetical particles which can behave like dark matter (DM) or dark energy (DE) depending on masses generated at the symmetry-breaking scale. It rema…
astro-ph.CO2024
Detecting ultralight axions from multifrequency observations of neutral hydrogen intensity mapping
Qianshuo Liu, Chang Feng, Filipe B. Abdalla
We investigate the effects of ultralight axions (ULAs) on the differential brightness temperature fluctuations of neutral hydrogen at the post-reionization stage. Unique structure…