Testing fundamental physics with the large-scale structure (LSS) across cosmic times

par Azadeh Moradinezhad (UNIGE)

jeudi 15 déc. 2022, 11:00 → 12:00 Europe/Paris

Salle des sommets (LAPTh)

The LSS provides a rich trove of information to probe the origin, evolution, and constituents of the Universe, thus, offering unique opportunities to test fundamental physics across cosmic history. Detection of individually resolved galaxies, as done in galaxy redshift surveys, and measurement of aggregate light from an ensemble of galaxies or intergalactic medium, as performed in line intensity mapping (LIM), are two observational techniques to map the LSS. While the former is now a relatively mature field with upcoming surveys, such as Euclid, expected to provide an unprecedented volume of high-precision data, the latter is still an emerging field, with future surveys currently in the planning stage. I will begin the talk by describing exciting prospects for using the LSS observations to search for imprints of new physics (e.g., the presence of new particles during inflation). I will then discuss the importance of developing statistical descriptors beyond 2-point correlation functions to extract the non-Gaussian information encoded in the LSS that is becoming particularly relavent given the ever-increasing precision of the LSS data. I will then illustrate the unique potential of LIM in shedding light on many of the open questions in cosmology by mapping the LSS over a wide range of scales and redshifts that are largely inaccessible to galaxy surveys.