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Ultraviolet imaging of old population in nearby galaxies
The Astrophysical Journal1992Vol. 395, pp. L45–L45
Citations Over TimeTop 10% of 1992 papers
R. W. O’Connell, R. C. Bohlin, Nicholas R. Collins, R. H. Cornett, J. K. Hill, Robert Hill, V. La Parola, Morton S. Roberts, Andrew M. Smith, T. P. Stecher
Abstract
We analyze UV imagery of two Sb bulges and two E galaxies obtained with the Ultraviolet Imaging Telescope during the Astro-1 mission. The UV brightness of these systems is not produced by recent massive star formation. Instead, it must originate in relatively low-luminosity objects, probably low-mass, post-giant-branch stars. We find extended, large-amplitude UV color gradients, which are probably related to abundance gradients within the galaxies. M32 has a color gradient opposite to the other three objects, possibly because of an intermediate- age population.
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