Swinburne
Browse

Integrated spectral energy distributions and absorption-feature indices of single stellar populations

Download (967.84 kB)
journal contribution
posted on 2024-07-11, 14:50 authored by Fenghui Zhang, Zhanwen Han, Lifang Li, Jarrod HurleyJarrod Hurley
Using evolutionary population synthesis, we present integrated spectral energy distributions and absorption-line indices defined by the Lick Observatory image dissector scanner (referred to as Lick/IDS) system, for an extensive set of instantaneous burst single stellar populations (SSPs). The ages of the SSPs are in the range 1-19 Gyr and the metallicities [Fe/H] are in the range -2.3 - 0.2. Our models use the rapid single stellar evolution algorithm of Hurley, Pols and Tout for the stellar evolutionary tracks, the empirical and semi-empirical calibrated BaSeL-2.0 model of Lejeune, Cuisinier and Buser for the library of stellar spectra and the empirical fitting functions of Worthey, Faber, Gonzalez and Burstein for the Lick/IDS spectral absorption-feature indices. Applying our synthetic Lick/IDS absorption-line indices to the merit function, we obtain the age and the metallicity of the central region of M32, which can be well explained by an instantaneous SSP with an age of 6.5 Gyr and a metallicity similar to solar. Applying the derived age and the metallicity from the merit function to a number of index-index diagrams, we find that the plots of Hbeta-Fe5015 and Hbeta-Fe5782 are the best index-index diagrams from which we can directly obtain reasonable age and metallicity.

History

Available versions

PDF (Accepted manuscript)

ISSN

0035-8711

Journal title

Monthly Notices of the Royal Astronomical Society

Volume

350

Issue

2

Pagination

14 pp

Publisher

Wiley

Copyright statement

Copyright © 2004 Royal Astronomical Society. The accepted manuscript is reproduced in accordance with the copyright policy of the publisher. The definitive publication is available at www.interscience.wiley.com.

Language

eng

Usage metrics

    Publications

    Categories

    No categories selected

    Keywords

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC