Speaker
Hong Guo
(Shanghai Astronomical Observatory)
Description
Accurately modeling the cold gas content in the universe is challenging for current theoretical models. We propose a new empirical model NeutralUniverseMachine to describe the evolution of HI and H2 gas along with the dark matter halos based on the UniverseMachine catalog. It is able to accurately fit the observed HI and H2 mass functions, molecular-to-atomic ratio, HI-halo mass relation, HI-stellar mass relations for star-forming and quenched galaxies, HI clustering measurements at z~0 and the HI-stellar mass relations at higher redshifts, as well as the evolution of cosmic gas densities in 0<z<6. Such a model framework would be useful for the next generation HI and H2 surveys.
Primary author
Hong Guo
(Shanghai Astronomical Observatory)
