The DOI matches its Crossref record; 19 of the 19 references it cites were found in a registry or an index.
RE-EXAMINING LARSON'S SCALING RELATIONSHIPS IN GALACTIC MOLECULAR CLOUDS
Open accessAbstract
The properties of Galactic molecular clouds tabulated by Solomon et al. (SRBY) are re-examined using the Boston University-FCRAO Galactic Ring Survey of 13 CO J = 1–0 emission. These new data provide a lower opacity tracer of molecular clouds and improved angular and spectral resolution compared with previous surveys of molecular line emission along the Galactic Plane. We calculate giant molecular cloud (GMC) masses within the SRBY cloud boundaries assuming local thermodynamic equilibrium (LTE) conditions throughout the cloud and a constant H 2 to 13 CO abundance, while accounting for the variation of the 12 C/ 13 C with galactocentric radius. The LTE-derived masses are typically five times smaller than the SRBY virial masses. The corresponding median mass surface density of molecular hydrogen for this sample is 42 M ☉ pc −2 , which is significantly lower than the value derived by SRBY (median 206 M ☉ pc −2 ) that has been widely adopted by most models of cloud evolution and star formation. This discrepancy arises from both the extrapolation by SRBY of velocity dispersion, size, and CO luminosity to the 1 K antenna temperature isophote that likely overestimates the GMC masses and our assumption of constant 13 CO abundance over the projected area of each cloud. Owing to the uncertainty of molecular abundances in the envelopes of clouds, the mass surface density of GMCs could be larger than the values derived from our 13 CO measurements. From velocity dispersions derived from the 13 CO data, we find that the coefficient of the cloud structure functions, v ° = σ v / R 1/2 , is not constant, as required to satisfy Larson's scaling relationships, but rather systematically varies with the surface density of the cloud as ∼Σ 0.5 as expected for clouds in self-gravitational equilibrium.
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Cites
McKee, C. F., & Ostriker, E. C. (2007) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.45.051806.110602 · Cited by 2,478
Mass, luminosity, and line width relations of Galactic molecular clouds
Solomon, P. M., Rivolo, A. R., Barrett, J., & Yahil, A. (1987) · The Astrophysical Journal · doi:10.1086/165493 · Cited by 1,611
The relationship between carbon monoxide abundance and visual extinction in interstellar clouds
Frerking, M. A., Langer, W. D., & Wilson, R. W. (1982) · The Astrophysical Journal · doi:10.1086/160451 · Cited by 1,040
The photodissociation and chemistry of interstellar CO
van Dishoeck, E. F., & Black, J. H. (1988) · The Astrophysical Journal · doi:10.1086/166877 · Cited by 943
The Boston University–Five College Radio Astronomy Observatory Galactic Ring Survey
Jackson, J. M., Rathborne, J. M., Shah, R. Y., Simon, R., Bania, T. M., Clemens, D. P., Chambers, E. T., Johnson, A. M., Dormody, M., Lavoie, R., et al. (2006) · The Astrophysical Journal Supplement Series · doi:10.1086/500091 · Cited by 649
Self-citationMilam, S. N., Savage, C., Brewster, M. A., Ziurys, L. M., & Wyckoff, S. (2005) · The Astrophysical Journal · doi:10.1086/497123 · Cited by 614
Massachusetts-Stony Brook Galactic plane CO survey - The Galactic disk rotation curve
Clemens, D. P. (1985) · The Astrophysical Journal · doi:10.1086/163386 · Cited by 573
Photoionization-regulated star formation and the structure of molecular clouds
McKee, C. F. (1989) · The Astrophysical Journal · doi:10.1086/167950 · Cited by 556
The Resolved Properties of Extragalactic Giant Molecular Clouds
Bolatto, A. D., Leroy, A. K., Rosolowsky, E., Walter, F., & Blitz, L. (2008) · The Astrophysical Journal · doi:10.1086/591513 · Cited by 514
Goldsmith, P. F., Heyer, M., Narayanan, G., Snell, R., Li, D., & Brunt, C. (2008) · The Astrophysical Journal · doi:10.1086/587166 · Cited by 480
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Cited by
Star Formation in the Milky Way and Nearby Galaxies
Kennicutt, R. C., & Evans, N. J. (2012) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-081811-125610 · Cited by 2,902
“Heyer et al. (2009) reanalyzed cloud properties in the inner Galaxy based on CO and 13CO surveys.”
BackgroundDale, J. E., Ercolano, B., & Bonnell, I. A. (2012) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2012.21205.x · Cited by 306
Pfeffer, J., Kruijssen, J. M. D., Crain, R. A., & Bastian, N. (2018) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stx3124 · Cited by 243
ESTIMATING THE STAR FORMATION RATE AT 1 kpc SCALES IN NEARBY GALAXIES
Leroy, A. K., Bigiel, F., de Blok, W. J. G., Boissier, S., Bolatto, A., Brinks, E., Madore, B., Munoz-Mateos, J.-C., Murphy, E., Sandstrom, K., et al. (2012) · The Astronomical Journal · doi:10.1088/0004-6256/144/1/3 · Cited by 203
“This value is intermediate among recent determinations of the Milky Way αCO (e.g., Strong & Mattox 1996; Dame et al. 2001; Heyer et al. 2009; Abdo et al. 2010) and represents a commonly adopted ”best single value” for work on nearby disk galaxies (e.g., Wong & Blitz 2002; Leroy et al. 2008).”
ResultDISTRIBUTION AND MASS OF DIFFUSE AND DENSE CO GAS IN THE MILKY WAY
Roman-Duval, J., Heyer, M., Brunt, C. M., Clark, P., Klessen, R., & Shetty, R. (2016) · The Astrophysical Journal · doi:10.3847/0004-637x/818/2/144 · Cited by 92
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Metadata
- Authors
- Heyer, M., Krawczyk, C., Duval, J., & Jackson, J. M.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2009-06-18
- Volume
- 699
- Issue
- 2
- Pages
- 1092-1103
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2043941242
- Cited by
- 658
- References
- 19
- FWCI
- 20.39
- Type
- journal article
- Language
- en
- Open access
- bronze
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