Other
Scientific paper
Feb 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..393..590c&link_type=abstract
The seventh astrophysical conference: Star formation, near and far. AIP Conference Proceedings, Volume 393, pp. 590-593 (1997).
Other
Magellanic Clouds And Other Irregular Galaxies, Hii Regions, Emission And Reflection Nebulae, Origin, Formation, Evolution, Age, And Star Formation, Magnitudes And Colors, Luminosities, Ultraviolet, Stellar Content And Populations, Radii, Morphology And Overall Structure
Scientific paper
A mosaic of four UIT far-UV (FUV; 1620 Å) images, which covers most of the SMC bar, is presented, with derived stellar and HII region photometry. The UV morphology of the SMC's Bar shows that recent star formation there has left striking features including: a) four concentrations of UV-bright stars spread from northeast to southwest at nearly equal (~30 arcmin=0.5 kpc) spacings; b) one concentration comprising a well-defined 8-arcmin diameter ring surrounded by a larger Hα ring, suggestive of sequential star formation. FUV PSF photometry is obtained for 11,306 stars, and FUV photometry is obtained for 42 Hα-selected HII regions, both for the stars and for the total emission contained in the apertures defined by KH [1]. The flux-weighted average ratio of total to stellar FUV flux is 2.15; the stellar FUV luminosity function indicates that most of the excess total flux is due to scattered FUV radiation, rather than faint stars. Both stellar and total emission are well correlated with Hα fluxes measured by KH, and yield FUV/Hα flux ratios that are consistent with models of single-burst clusters with SMC metallicity, ages from 1-5 Myr, and moderate (E(B-V)=0.0-0.1 mag) internal SMC extinction.
Cornett Robert H.
Stecher Theodore P.
UIT Science Team
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