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Cited by 218

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The Role of Pressure in Giant Molecular Cloud Formation

Open access
Blitz, Leo, Rosolowsky, Erik·2004·The Astrophysical Journal
DOI 10.1086/424661
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Abstract

We examine the hypothesis that hydrostatic pressure alone determines the ratio of atomic to molecular gas averaged over a particular radius in disk galaxies. The hypothesis implies that the transition radius, the location where the ratio is unity, should always occur at the same value of stellar surface density in all galaxies. We examine data for 28 galaxies and find that the stellar surface density at the transition radius is indeed constant to within 40% at a value of 120 M ☉ pc -2 . If the hypothesis can be confirmed at all radii within a large range of galaxy types and metallicities, combining it with the observed relation between the star formation rate and H 2 surface density may enable us to derive a physically motivated star formation prescription with wide applicability.

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Metadata

Authors
Blitz, L., & Rosolowsky, E.
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2004-08-05
Volume
612
Issue
1
Pages
L29-L32
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
DOI
10.1086/424661
OpenAlex
W2004446257
Cited by
218
References
0
FWCI
4.33
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: The Role of Pressure in Giant Molecular Cloud Formation. https://app.cochat.ai/papers/10.1086/424661
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Blitz, L., & Rosolowsky, E. (2004). The Role of Pressure in Giant Molecular Cloud Formation. The Astrophysical Journal. https://doi.org/10.1086/424661

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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.