Evidence for a Young Stellar Population in NGC 5018

Abstract

Two absorption line indices, Ca II and Hdelta/FeI4045, measured from high resolution spectra are used with evolutionary synthesis models to verify the presence of a young stellar population in NGC 5018. The derived age of this population is about ~2.8 Gyr with a metallicity roughly solar and it completely dominates the integrated light of the galaxy near 4000 A.

13 pages, 7 figures (figs 3-7 are color figures), to be published in the May 2000 issue of the Astrophysical Journal

References in corpus (1)

• Old Stellar Populations. VI. Absorption-Line Spectra of Galaxy Nuclei and Globular Clusters

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