Relatore
Descrizione
The coming decade will be decisive for Cosmology because, for the first time, several largely independent probes of the Universe will become simultaneously mature. On the large-scale-structure side, DESI is already delivering high-precision BAO constraints, while Euclid, Rubin/LSST and Roman will map the expansion history and the growth of structure with unprecedented reach. On the CMB side, ACT DR6 has provided a new post-Planck benchmark, Simons Observatory is entering operations, and LiteBIRD is expected to sharpen tests of primordial physics and inflation. At the same time, gravitational-wave astronomy is evolving from proof of concept to an actual cosmological tool, through standard sirens, propagation tests, and stochastic backgrounds, with PTAs now in a characterisation era and LISA offering the prospect of direct access to cosmological gravitational-wave backgrounds. In this talk I will discuss how gravitational waves, large-scale structure, and the CMB can be combined to test the expansion history, the growth of cosmic structure, dark energy, neutrino physics, primordial fluctuations, and possible departures from General Relativity. The key question is whether these probes will converge on a coherent extension of the standard cosmological framework, or instead reveal statistically significant cracks in ΛCDM.
| Sessione | Cosmologia |
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