Colloquium on Jun. 5, 2025
Exploring Cosmic Frontiers: Multi-Wavelength Insights into Cosmology and Galaxy Astrophysics
Speaker: Daisuke Nagai (Yale University)
Venue: SWIFAR Building 2111
Time: 16:00 PM, Thursday, Jun. 5, 2025
Abstract:
We are in the midst of a transformative era in cosmology, driven by groundbreaking multi-wavelength surveys such as Euclid, eROSITA, Rubin-LSST, Simons Observatory, and CMB-S4. These ambitious projects promise to significantly enhance our understanding of the universe, presenting substantial scientific opportunities and challenges with the vast data they will generate. Recent advancements in computational modeling, artificial intelligence (AI), and machine learning (ML) are essential for harnessing the full potential of these data. Observations of Sunyaev-Zel'dovich (SZ) effects, X-ray emissions, fast radio bursts (FRBs), and absorption line studies offer profound insights into galaxy formation, baryonic physics, and cosmological parameters. Galaxy clusters, being the most massive gravitationally bound objects, serve as excellent testbeds for both cosmology and astrophysics due to their immense mass and large-scale structure. Additionally, the recent detection and characterization of the elusive circum-galactic medium (CGM) with multi-wavelength data are revolutionizing our understanding of missing baryons. This shift from merely accounting for baryons to precision modeling sheds light on the impact of baryonic feedback on current cosmological tensions. In this talk, I will explore key insights derived from modern simulations and outline a strategic roadmap for optimizing scientific returns from these surveys. By integrating simulation data with advanced ML techniques, we aim to refine our cosmic interpretations and direct future research in precision cosmology and galaxy astrophysics. Join us as we leverage the golden age of multi-wavelength surveys to unlock the mysteries of the cosmos, deepen our understanding of galaxy clusters and missing baryons, and address the complex challenges posed by cosmological tensions.
