Skip to main content
Event Date and Time
Daniel Grin, Haverford College
Ultra-light axions are a well-motivated candidate for dark matter and dark energy, motivated both by considerations from high-energy theory and observational challenges to the Lambda CDM cosmological paradigm. We will summarize the motivation to consider such a dark-sector component, and explore empirical consequences, ranging from the primary anisotropies of the CMB to late-time secondary anisotropies imprinted by gravitational lensing and Compton scattering in galaxy clusters, to local precision measurements. We will explore the potential of upcoming experimental efforts to critically test the ultra-light dark-sector parameter space.
Event Types