Metallicity versus age in spiral nuclei

Details Metallicity versus age in spiral nuclei Metallicity versus age in spiral nuclei

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...257...89o&link_type=abstract

Astrophysical Journal, Part 1, vol. 257, June 1, 1982, p. 89-93.

Astronomy and Astrophysics

Astrophysics

19

Abundance, Astronomical Photometry, Galactic Evolution, Galactic Nuclei, Globular Clusters, Spiral Galaxies, Horizontal Branch Stars, Metals, Red Shift, Stellar Systems

Scientific paper

It has recently been proposed that the blue nuclei of late-type spiral galaxies are old, metal-poor stellar systems in which the horizontal branch dominates the light. This is contrary to the conventional interpretation which holds that the blueness results from the presence of a substantial young (less than 1 Gyr) stellar population. In this paper it is shown that straightforward comparison of narrow-band scanner colors for Sc nuclei and globular clusters in the Local Group excludes the possibility that the nuclei are old, metal-poor systems. Photometric precisions higher than 5% are in general necessary for such a distinction to be made, however.

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