Speaker
Stefano Cristiani
Description
Studying the absorption lines along the lines of sight to bright high-z QSOs is an invaluable cosmological tool, providing insight into the intergalactic/circumgalactic medium, dark matter, big-bang nucleosynthesis and general relativity. I report here the recent results of the QUBRICS (QUasars as BRIght beacons for Cosmology in the Southern hemisphere) survey and high-resolution spectroscopy with the ESPRESSO high-fidelity spectrograph, the lessons learned and the synergies (particularly in terms of Machine Learning and new instrumentation for future 30m-class telescopes) and implications for the cosmic UV background, reionization, small-scale structure and the Sandage test of the cosmic redshift drift.
