The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
THE STAR FORMATION LAW AT LOW SURFACE DENSITY
Open accessAbstract
We investigate the nature of the star formation law at low gas surface densities using a sample of 19 low surface brightness (LSB) galaxies with existing H i maps in the literature, UV imaging from the Galaxy Evolution Explorer satellite, and optical images from the Sloan Digital Sky Survey. All of the LSB galaxies have ( NUV − r ) colors similar to those for higher surface brightness star-forming galaxies of similar luminosity indicating that their average star formation histories are not very different. Based upon four LSB galaxies with both UV and far-infrared (FIR) data, we find FIR/UV ratios significantly less than 1, implying low amounts of internal UV extinction in LSB galaxies. We use the UV images and H i maps to measure the star formation rate (SFR) and hydrogen gas surface density within the same region for all the galaxies. The LSB galaxy star formation rate surface densities lie below the extrapolation of the power law fit to the SFR surface density as a function of the total gas density for higher surface brightness galaxies. Although there is more scatter, the LSB galaxies also lie below a second version of the star formation law in which the SFR surface density is correlated with the gas density divided by the orbital time in the disk. The downturn seen in both star formation laws is consistent with theoretical models that predict lower star formation efficiencies in LSB galaxies due to the declining molecular fraction with decreasing density.
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Citations
Cites
On the Gravitational Stability of a Disk of Stars
Toomre, A. (1964) · The Astrophysical Journal · doi:10.1086/147861 · Cited by 3,349 · cited 2×
“…Σgas is the total (atomic plus molecular) gas surface density in units of M⊙ pc −2, fGMC is the fraction of gas in giant molecular clouds, φP̄ is the ratio of the pressure inside a molecular cloud to the pressure at its surface, and Q is the stability parameter as defined by Toomre (1964).”
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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
“These provide a homogeneous body of deep measurements of the star formation and the nature of the star formation law at low surface densities (§6; Wyder et al. 2009).”
BackgroundEXTREMELY INEFFICIENT STAR FORMATION IN THE OUTER DISKS OF NEARBY GALAXIES
Bigiel, F., Walter, F., Blitz, L., Brinks, E., de Blok, W. J. G., & Madore, B. (2010) · The Astronomical Journal · doi:10.1088/0004-6256/140/5/1194 · Cited by 398
Self-citationKrumholz, M. R. (2014) · Physics Reports · doi:10.1016/j.physrep.2014.02.001 · Cited by 321
van der Kruit, P. C., & Freeman, K. C. (2011) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-083109-153241 · Cited by 283
Metadata
- Authors
- Wyder, T. K., Martin, D. C., Barlow, T. A., Foster, K., Friedman, P. G., Morrissey, P., Neff, S. G., Neill, J. D., Schiminovich, D., Seibert, M., Bianchi, L., Donas, J., Heckman, T. M., Lee, Y.-W., Madore, B. F., Milliard, B., Rich, R. M., Szalay, A. S., & Yi, S. K.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2009-04-27
- Volume
- 696
- Issue
- 2
- Pages
- 1834-1853
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W1988201366
- Cited by
- 159
- References
- 1
- FWCI
- 6.85
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Wyder, T. K., Martin, D. C., Barlow, T. A., Foster, K., Friedman, P. G., Morrissey, P., Neff, S. G., Neill, J. D., Schiminovich, D., Seibert, M., Bianchi, L., Donas, J., Heckman, T. M., Lee, Y.-W., Madore, B. F., Milliard, B., Rich, R. M., Szalay, A. S., & Yi, S. K. (2009). THE STAR FORMATION LAW AT LOW SURFACE DENSITY. The Astrophysical Journal. https://doi.org/10.1088/0004-637x/696/2/1834
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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