UIT Astro-2 Observations of NGC 4449

Details UIT Astro-2 Observations of NGC 4449 UIT Astro-2 Observations of NGC 4449

1996-12-17

arxiv.org/abs/astro-ph/9612168v1

Astronomy and Astrophysics

Astrophysics

4 pages, Latex with AIP proceedings macros, 2 EPS figures. To appear in proceedings of U. Maryland October Astrophysics Conf.,

Scientific paper

10.1063/1.52826

The bright Magellanic irregular galaxy NGC 4449 was observed by the Ultraviolet Imaging Telescope (UIT) during the Astro-2 Spacelab mission in March, 1995. Far ultraviolet (FUV) images at a spatial resolution of ~3 arcsec show bright star-forming knots that are consistent with the general optical morphology of the galaxy and are often coincident with bright H II regions. Comparison of FUV with H-alpha shows that in a few regions, sequential star formation may have occurred over the last few Myr. The bright star forming complexes in NGC 4449 are superposed on a smooth, diffuse FUV background that may be associated with the H-alpha "froth."

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