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Compactness of Cold Gas in High-Redshift Galaxies

Abstract:

Galaxies in the early Universe were more compact and contained more molecular gas than today. In this paper, we revisit the relation between these empirical findings, and we quantitatively predict the cosmic evolution of the surface densities of atomic (HI) and molecular (H2) hydrogen in regular galaxies. Our method uses a pressure-based model for the H2/HI-ratio of the Interstellar Medium, applied to ~3*10^7 virtual galaxies in the Millennium Simulation. We predict that, on average, the HI-s...

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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:
MNRAS
Volume:
400
Issue:
2
Pages:
665-669
Publication date:
2009-08-05
DOI:
EISSN:
1365-2966
ISSN:
0035-8711
URN:
uuid:8388b9ca-d2b0-408b-a63d-3b0ca39b276a
Source identifiers:
31133
Local pid:
pubs:31133

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