Evidence for a young stellar population in NGC 5018

Authors
Leonardi, AJ Worthey, G
Citation
Aj. Leonardi et G. Worthey, Evidence for a young stellar population in NGC 5018, ASTROPHYS J, 534(2), 2000, pp. 650-659
Citations number
40
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
534
Issue
2
Year of publication
2000
Part
1
Pages
650 - 659
Database
ISI
SICI code
0004-637X(20000510)534:2<650:EFAYSP>2.0.ZU;2-K
Abstract
Two absorption line indices, Ca II and H delta/lambda 4045, measured from h igh-resolution spectra are used with evolutionary synthesis models to verif y the presence of a young stellar population in NGC 5018. The derived age o f this population is similar to 2.8 Gyr with a metallicity roughly solar, a nd it completely dominates the integrated light of the galaxy near 4000 Ang strom.