Ultraviolet Imaging Telescope Observations of OB Associations and HII Regions in the Magellanic Clouds

Details Ultraviolet Imaging Telescope Observations of OB Associations and HII Regions in the Magellanic Clouds Ultraviolet Imaging Telescope Observations of OB Associations and HII Regions in the Magellanic Clouds

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.5102p&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #51.02; Bulletin of the American Astronomical Society, Vol. 28, p.900

Astronomy and Astrophysics

Astronomy

Scientific paper

We present wide-field far-ultraviolet (FUV: 1300-1800 Angstroms) images of the Large and Small Magellanic Clouds. These data were obtained by the Ultraviolet Imaging Telescope (UIT) during the Astro-1 (1990 December 1--10) and Astro-2 (1996 March 2--18) missions; the images provide a nearly complete FUV mosaic of the SMC and contain numerous regions in the LMC, covering a range of stellar densities and current star-formation activity. A total of 94 LMC/Lucke-Hodge (1970, AJ, 75, 171) and 77 SMC/Hodge (1985, PASP, 97, 530) OB associations are completely or partially included in the observed fields. The FUV data allow us to identify the hottest OB stars more accurately than with optical photometry, and these stars dominate the ionizing flux which can be correlated to the observed Hα flux of the associated Hii regions. Of the Hii regions in the DEM catalog (Davies, Elliott, & Meaburn 1976, MNRAS, 81, 89), the UIT fields completely or partially include 48 DEM regions in the LMC and 40 DEM in the SMC. We compare the integrated FUV fluxes and luminosity functions of these DEM Hii regions with the results from Hα measurements (Kennicutt & Hodge 1986, ApJ, 306, 130).

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