｢Cosmology with the Lyman-alpha forest｣

by Andrei Cuceu

The Lyman-alpha forest is a key probe of the high redshift Universe. I will present methods for measuring baryon acoustic oscillations (BAO) from the Ly-alpha forest, and their cosmological implications. I will show how these measurements can help us constrain the Hubble constant without using CMB anisotropies, and the implications for the Hubble tension. With the start of the Dark Energy Spectroscopic Instrument (DESI) survey next year, we are expecting about an order of magnitude more data compared to past surveys. This opens up new opportunities for extracting more cosmological information through the Alcock-Paczynski test, and also for exploiting the synergies between Ly-alpha absorption and quasar clustering.