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Line Strength Gradients in Low Luminosity Galaxies

  • C. Halliday
  • G. Baggley
  • R. L. Davies
  • M. Birkinshaw
  • R. Bender
  • R. Saglia
Conference paper
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 171)

Abstract

Line strength gradients in luminous ellipticals show changes in metallicity of roughly a factor of two out to an effective radius (Worthey, Faber & Gonzalez, 1992; Davies, Sadler & Peletier (DSP), 1993; Gonzalez, 1993). The observed decline in Mg2 line strength with increasing radius, while Hβ remains roughly constant, has been interpreted to indicate an age gradient with the central parts of ellipticals being younger than the outer regions.

References

  1. Binggeli, B., Sandage, A., and Tammann, G.A. (1985) AJ, 90, 1681.ADSCrossRefGoogle Scholar
  2. Davies, R.L., Sadler, E.M., Peletier, R.F., (1993) MNRAS, 262, 650 (DSP).ADSGoogle Scholar
  3. Gonzalez, J. J., (1993) PhD Thesis, University of California, Santa Cruz.Google Scholar
  4. Worthey, G., Faber, S., Gonzalez, J.J., (1992) ApJ, 398, 69.ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1996

Authors and Affiliations

  • C. Halliday
    • 1
  • G. Baggley
    • 1
  • R. L. Davies
    • 1
  • M. Birkinshaw
    • 2
  • R. Bender
    • 3
  • R. Saglia
    • 3
  1. 1.Department of PhysicsUniversity of DurhamUK
  2. 2.Harvard Smithsonian Center for AstrophysicsUSA
  3. 3.University of MunichGermany

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