UIT Observations of the Small Magellanic Cloud

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Session 32 -- Local Group Galaxies
Display presentation, Tuesday, 9:30-6:30, Heller Lounge Room

[32.02] UIT Observations of the Small Magellanic Cloud

\newcommand{\mbfive}{m$_{162}$} \newcommand{\maone}{m$_{249}$} \newcommand{\mbone}{m$_{152}$} \newcommand{\ha}{H$\alpha$ {}} \newcommand{\hii}{H\small{II} \normalsize} T.P. Stecher (NASA/GSFC), K.P. Cheng (NRC/GSFC), R.H. Cornett, J.K. Hill (Hughes STX), R.C. Bohlin (STSciI), R.W. O'Connell (U.Va.), M.R. Roberts (NRAO), A.M. Smith (NASA/GSFC)

Ultraviolet Imaging Telescope (UIT) 1520\AA, 1620\AA, and 2490\AA~ observations of a region near the SMC Henize \ha emission object 19 are compared with groundbased data and used to analyze the stellar content and the nature and distribution of dust in the 40 arcmin field. More than 1500 stellar sources are identified on both the 1620\AA~(magnitudes \mbfive) and 2490\AA~ (\maone) UIT images, and 397 are identified in the 1520\AA (\mbone) image. Magnitudes \mbone, \mbfive, \maone, and m$_{B}$~ are derived for objects in the field and are used to determine spectral types and extinctions using a least-squares technique, based on a spectrophotometric library compiled from IUE spectra. Results are evaluated for fits using standard Galactic, SMC, and LMC extinction functions, and the spatial distribution of the amount and type of extinction are analyzed. Color-magnitude diagrams for the field are presented, and compared with UIT and ground-based results for the LMC 30-Dor region, Lucke and Hodge LMC associations, and M31 associations.

Tuesday program listing