Astrophysics and Space Science

, Volume 267, Issue 1, pp 273–281

The Stellar Ages of Elliptical Galaxies

  • S.M. Faber
  • S.C. Trager
  • J.J. Gonzalez
  • Guy Worthey
Article

DOI: 10.1023/A:1002793624307

Cite this article as:
Faber, S., Trager, S., Gonzalez, J. et al. Astrophysics and Space Science (1999) 267: 273. doi:10.1023/A:1002793624307

Abstract

Integrated broad-band colors and metallic lines cannot discriminate clearly between the effects of age and Z in old stellar populations. Such data are more sensitive to Z than to age. The Hβ feature provides a way to break this degeneracy. New measurements indicate that the mean stellar ages of typical E galaxy nuclei are fairly young, ranging from 2 to ∼12 Gyr. The outer parts of E galaxies are both older and more metal-poor than nuclei, consistent with the formation of E galaxies via mergers and starbursts. Age effects contribute strongly to the classic color-line strength sequence of E galaxies.

Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • S.M. Faber
    • 1
  • S.C. Trager
    • 1
  • J.J. Gonzalez
    • 2
  • Guy Worthey
    • 3
  1. 1.UCO/Lick ObservatoryUC Santa CruzSanta Cruz
  2. 2.Instituto de AstronomiaUNAMMexico CityMexico
  3. 3.Dept. of AstronomyUniv. of MichiganAnn Arbor

Personalised recommendations