HI and H2 gas evolution over cosmic times: ColdSIM

Date Issued
2022
Author(s)
DOI
Abstract
We present first results of the evolution of cold cosmic gas obtained through a set of state-of-the-art numerical simulations (ColdSIM). We model time-dependent atomic and molecular non-equilibrium chemistry coupled to HI and H2 self-shielding, various UV backgrounds as suggested by the recent literature, H2 dust grain catalysis, photoelectric heating, cosmic-ray heating, as well as hydrodynamics, star formation and feedback effects. By means of such non-equilibrium calculations we are finally able to reproduce the latest HI and H2 observational data. Both observed HI and H2 trends are well reproduced by our non-equilibrium H2-based star formation modelling. H2 depletion times remain below the Hubble time and comparable to the dynamical time at all epochs. These findings suggest that, besides HI, non-equilibrium H2 analyses are key probes for assessing the cold gas and the role of UV background radiation.
Coverage
mm Universe @ NIKA2 - Observing the mm Universe with the NIKA2 camera
All editors
De Petris, M.; Ferragamo, A.; Mayet, F.
Series
Volume
257
Start page
00029
Conferenece
mm Universe @ NIKA2 - Observing the mm Universe with the NIKA2 camera
Conferenece place
Rome, Italy
Conferenece date
June 28-July 2, 2021
Uri
Url
Issn Identifier
2101-6275
Rights
open.access
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