Other
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...186.2010n&link_type=abstract
American Astronomical Society, 186th AAS Meeting, #20.10; Bulletin of the American Astronomical Society, Vol. 27, p.835
Other
1
Scientific paper
During the Astro-2 mission, the Ultraviolet Imaging Telescope (UIT) obtained deep far-UV (FUV: 1200-1800 Angstroms) images of about 30 interacting, starburst, and/or active galaxies. These images are presented and compared with observations at other wavelengths to determine the recent star formation activity and the interaction history of the systems. ``Non-normal'' galaxies observed by UIT represent a range of object types and sample a variety of environments. FUV studies of interacting systems (e.g. M51/NGC 5195, NGC 4038/4039) will allow measures of interaction-triggered star formation. FUV observations of nuclear starbursts (e.g. NGC 5236(M83), NGC 1097, NGC 2903) or galaxy-dominating starbursts (e.g. NGC 3310, NGC 4214) will provide new insight into star formation rates and IMF's in these systems. FUV imaging of a variety of active galaxies (e.g. Cen-A, NGC 4151, NGC 1566) will lead to a better understanding of the role an AGN plays in a galaxy's star-forming history and vice-versa. The UIT images are wide-field (40 arcmin diameter), high sensitivity ( ~ 1\dexp{-18} \flx, or mFUV ~ 24 arcsec(-2) , averaged over the 225-400 Angstroms bandpasses), and high resolution ( ~ 3 arcsec FWHM). Most images were obtained in the UIT ``B1'' bandpass ( ~ 1250 - 1800 Angstroms); some systems were also imaged in the ``B5'' filter ( ~ 1400 - 1800 Angstroms). In addition to isolating current massive-star-forming regions in these systems, the UIT images map the spatial distribution of strong emission features such as the hydrogen two-photon continuum, CIV 1549 Angstroms and redshifted Lyalpha emission lines.
Neff Susan G.
Stecher Theodore P.
UIT Science Team
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