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In the era of precision cosmology, exploring new and complementary approaches to measure how the Universe (and the structures therein) have evolved is of fundamental importance, to increase the accuracy in the measurements and keep under control systematic effects. In this talk, I will present a novel approach to obtain constraints on the expansion rate of the Universe based on the differential age evolution of "cosmic chronometers". The strength of this method is that it allows a direct measurement of the Hubble parameter H(z) without relying on any cosmological assumptions, providing an ideal framework to test cosmological models.
I will review the latest results obtained, both in terms of H(z) measurements and of treatments of systematics, and I will discuss how this data can be used to constrain cosmological models, how these results compare with the ones obtained with more standard probes, and, finally, also how they can provide some helpful insight in the H0 controversy.
Michele went to Milan University for his Bachelor and Master. He obtained his Ph.D in astronomy at Bologna University, where he also did his postdoc and is now an assistant professor. Michele’s research interests are observational cosmology, galaxy formation and evolution, and their connection to cosmological models. The main areas of his research are: the development of the “cosmic chronometer” — a direct probe of the Hubble parameter at high redshifts, galaxy clustering especially their 3-point statistics, and early-type galaxy formation and evolution.
Tencent/VooV Meeting Link:
https://voovmeeting.com/s/YhyOyHxkS8Od
Meeting ID: 695 0737 2848
Meeting Password: 123456