Kavli Affiliate: Nickolay Gnedin | First 5 Authors: Enrico Garaldi, Nickolay Gnedin, Piero Madau, , | Summary: We investigate Lyman-$alpha$ transmission spikes at $z > 5$ in synthetic quasar spectra, and discuss their connection to the properties of the intergalactic medium and their ability to constrain reionization models. We use state-of-the-art radiation-hydrodynamic simulations from the […]