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http://hdl.handle.net/20.500.12386/32358
Title: | HI and H2 gas evolution over cosmic times: ColdSIM | Authors: | MAIO, Umberto | Issue Date: | 2022 | Volume: | mm Universe @ NIKA2 - Observing the mm Universe with the NIKA2 camera | Editors: | De Petris, M.; Ferragamo, A.; Mayet, F. | Series: | EPJ WEB OF CONFERENCES | Number: | 257 | First Page: | 00029 | 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. | Conference Name: | mm Universe @ NIKA2 - Observing the mm Universe with the NIKA2 camera | Conference Place: | Rome, Italy | Conference Date: | June 28-July 2, 2021 | URI: | http://hdl.handle.net/20.500.12386/32358 | URL: | https://www.epj-conferences.org/articles/epjconf/abs/2022/01/epjconf_mmUniverse2021_00029/epjconf_mmUniverse2021_00029.html http://arxiv.org/abs/2111.01804v1 |
ISSN: | 2101-6275 | DOI: | 10.1051/epjconf/202225700029 | Fulltext: | open |
Appears in Collections: | 3.01 Contributi in Atti di convegno |
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File | Description | Size | Format | |
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2111.01804.pdf | postprint | 341.13 kB | Adobe PDF | View/Open |
epjconf_mmUniverse2021_00029.pdf | Pdf editoriale | 430.81 kB | Adobe PDF | View/Open |
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