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| Paper: |
Comparing Ultraviolet and Hα Star Formation Rates |
| Volume: |
230, Galaxy Disks and Disk Galaxies |
| Page: |
305 |
| Authors: |
Bell, E. F.; Kennicutt, R. C. |
| Abstract: |
We have used a sample of 43 star-forming galaxies imaged in the far-ultraviolet (FUV) by the UIT supplemented with 33 galaxies observed by FAUST, to explore the consistency of UV and Hα derived star formation rates (SFRs). We find, even before correction for dust, that UV and Hα SFRs are quantitatively consistent for low-luminosity galaxies, and that higher luminosity galaxies have Hα SFRs a factor of 1.5 higher than their UV SFRs: this reflects the influence of dust. Our results are consistent with a scenario where the UV dust extinction is a factor of <≈ 2 larger than the Hα dust extinction in a given galaxy, and that there is over a 4 magnitude range of Hα dust extinctions which correlate loosely with galaxy luminosity such that low luminosity galaxies tend to have lower extinctions than their higher luminosity counterparts. |
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