Evidence for a Young Stellar Population in NGC 5018 | Zendy

Andrew J. Leonardi | Zendy; Guy Worthey | Zendy

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Evidence for a Young Stellar Population in NGC 5018

Author(s) -

Andrew J. Leonardi,

Guy Worthey

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/308764

Subject(s) - metallicity , stellar population , astrophysics , galaxy , population , physics , line (geometry) , spectral line , astronomy , star formation , demography , geometry , mathematics , sociology

Two absorption line indices, Ca II and Hdelta/FeI4045, measured from highresolution spectra are used with evolutionary synthesis models to verify thepresence of a young stellar population in NGC 5018. The derived age of thispopulation is about ~2.8 Gyr with a metallicity roughly solar and it completelydominates the integrated light of the galaxy near 4000 A.Comment: 13 pages, 7 figures (figs 3-7 are color figures), to be published in the May 2000 issue of the Astrophysical Journa

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