Speaker: Azadeh Moradinezhad Dizgah (Geneva U.)
Title: Probing fundamental physics with mm-wavelength line intensity mapping: forecasts and accurate modelling
Abstract:
Line intensity mapping (LIM) is emerging as a powerful technique to map the large-scale cosmic structure over a wide range of scales and redshifts. In addition to 21cm hyperfine transition line of neutral hydrogen, rotational lines of carbon monoxide, CO, and fine structure line of ionized carbon, [CII], are two of the most studied line candidates. In the first part of this talk, I will highlight the potential of CO/[CII] LIM surveys in probing fundamental physics, presenting forecasts for constraining primordial non-Gaussianity and sum of neutrino masses and number of thermal light relics using line power spectrum. In the second half of the talk, I  will present an accurate model of line intensity power spectrum, based on the halo model framework combined with EFTofLSS, which addresses two essential ingredients missing in the state-of-the-art models; nonlinearities of dark matter and biasing relation, and the shot-noise contributions beyond the Poisson approximation. I will show the remarkable (better than 5%) agreement of the model with the first cosmological-scale simulated intensity maps, and conclude with detection prospects of baryon Acoustic Oscillation signal with future ground- and space-based LIM surveys.