par Giulio Fabbian (IAS)
Salle : 123, bât. 121
Résumé :
Cosmology is entering a new high precision era with the next generation ground-based CMB polarization experiments and space based galaxy surveys (Simons Observatory, CMB-S4, Euclid). These experiments will deliver high-sensitivity data sets on large sky fractions and will enable us to constrain cosmology and astrophysics on all scales.In this talk I will review some of the research topics in cosmology and astrophysics I have covered in my past research career and discuss the science I will carry out at IAS in the foreseeable future.In particular I will zoom in on some works I have been involved with using space data. I will first discuss the new Quaia catalog, the largest quasar catalog produced to date, derived from data of the Gaia mission. I will show how this catalog can be used to constrain primordial and late-time universe physics, and show how upcoming Euclid data are expected to improve the constraining power of such measurements. I will then focus on new probes of primordial and late time universe that can be extracted from CMB spectral distortion measurements. I will show how a re-analysis of archival data from the COBE/FIRAS mission using modern data analysis techniques allowed us to improve significantly the FIRAS original results and constrain feedback processes in galaxy formation, making the prospects of new experiments like e.g. BISOU particularly promising.