Short Talk: Jose Carlos Fonseca

Title: Cosmology with intensity mapping techniques using atomic and molecular lines
Abstract:
Intensity Mapping (IM) opens a new window for future cosmological surveys which can tomographically probe large volumes of the universe. We will present a systematic study of IM using different emission lines from galaxies. We identify which ones are more promising for cosmological studies of the post reionization epoch. We consider the emission of Lyα, Hα, Hβ, optical and infrared oxygen lines, nitrogen lines, CII and the CO rotational lines. We will show that Lyα, Hα, OII, CII and the lowest rotational CO lines are the best candidates to be used in IM experiments for cosmology. These lines form a complementary set of probes of the galaxies emission spectra. We then use reasonable experimental setups from current, planned or proposed experiments to assess the detectability of the 3D power spectrum of each emission line. Intensity mapping of Lyα emission from z = 2 to 3 will be possible in the near future with HETDEX, while far-infrared lines require new dedicated experiments. We also show that the proposed SPHEREx satellite can use OII and Hα IM to study the large-scale distribution of matter in intermediate redshifts of 1 to 4. We find that submilimeter experiments with bolometers can have similar performances at intermediate redshifts using CII and CO(3-2).