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Scaling Relations between Gas and Star Formation in Nearby Galaxies
| Content Provider | Scilit |
|---|---|
| Author | Bigiel, Frank Leroy, Adam Walter, Fabian |
| Copyright Year | 2010 |
| Description | High resolution, multi-wavelength maps of a sizeable set of nearby galaxies have made it possible to study how the surface densities of H i, $H_{2}$ and star formation rate $(Σ_{HI}$, $Σ_{H2}$, $Σ_{SFR}$) relate on scales of a few hundred parsecs. At these scales, individual galaxy disks are comfortably resolved, making it possible to assess gas-SFR relations with respect to environment within galaxies. $Σ_{H2}$, traced by CO intensity, shows a strong correlation with $Σ_{SFR}$ and the ratio between these two quantities, the molecular gas depletion time, appears to be constant at about 2 Gyr in large spiral galaxies. Within the star-forming disks of galaxies, $Σ_{SFR}$ shows almost no correlation with $Σ_{HI}$. In the outer parts of galaxies, however, $Σ_{SFR}$ does scale with $Σ_{HI}$, though with large scatter. Combining data from these different environments yields a distribution with multiple regimes in $Σ_{gas}$ – $Σ_{SFR}$ space. If the underlying assumptions to convert observables to physical quantities are matched, even combined datasets based on different SFR tracers, methodologies and spatial scales occupy a well define locus in $Σ_{gas}$ – $Σ_{SFR}$ space. |
| Related Links | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/FE49D232A70C950B6D1767885BBA4B52/S1743921311000597a.pdf/div-class-title-scaling-relations-between-gas-and-star-formation-in-nearby-galaxies-div.pdf |
| Ending Page | 334 |
| Page Count | 8 |
| Starting Page | 327 |
| ISSN | 17439213 |
| e-ISSN | 17439221 |
| DOI | 10.1017/s1743921311000597 |
| Journal | Proceedings of the International Astronomical Union |
| Issue Number | S270 |
| Volume Number | 6 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2010-05-01 |
| Access Restriction | Open |
| Subject Keyword | Proceedings of the International Astronomical Union Astronomy and Astrophysics Evolution Ism Galaxies |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
