Evidence for a Young Stellar Population in NGC 5018

Details Evidence for a Young Stellar Population in NGC 5018 Evidence for a Young Stellar Population in NGC 5018

2000-02-16

arxiv.org/abs/astro-ph/0002321v1

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1086/308764

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.

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