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The Cosmic Decline in the H2/HI-Ratio in Galaxies

Abstract:

We use a pressure-based model for splitting cold hydrogen into its atomic (HI) and molecular (H2)components to tackle the co-evolution of HI, H2, and star formation rates (SFR) in ~3e7 simulated galaxies in the Millennium simulation. The main prediction is that galaxies contained similar amounts of HI at redshift z=1-5 than today, but substantially more H2, in quantitative agreement with the strong molecular line emission already detected in a few high redshift galaxies and approximately cons...

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Publication status:
Published

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Authors


Obreschkow, D More by this author
Rawlings, S More by this author
Journal:
ApJL
Volume:
696
Issue:
2
Pages:
L129-L132
Publication date:
2009-04-01
DOI:
EISSN:
1538-4357
ISSN:
2041-8205
URN:
uuid:d8ed80a4-4c8c-4f72-8e26-e86d9aecda61
Source identifiers:
10634
Local pid:
pubs:10634

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