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Line Strength Gradients in Low Luminosity Galaxies

Published online by Cambridge University Press:  25 May 2016

C. Halliday ,
G. Baggley ,
R. L. Davies ,
M. Birkinshaw ,
R. Bender  and
R. Saglia
C. Halliday
Affiliation:
Department of Physics, University of Durham
G. Baggley
Affiliation:
Department of Physics, University of Durham
R. L. Davies
Affiliation:
Department of Physics, University of Durham
M. Birkinshaw
Affiliation:
Harvard Smithsonian Center for Astrophysics
R. Bender
Affiliation:
University of Munich
R. Saglia
Affiliation:
University of Munich

Extract

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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.

Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 171: New Light on Galaxy Evolution , 1996 , pp. 387
Copyright
Copyright © Kluwer 1996 

References

Binggeli, B., Sandage, A., and Tammann, G.A. (1985) AJ, 90, 1681.CrossRefGoogle Scholar
Davies, R.L., Sadler, E.M., Peletier, R.F., (1993) MNRAS, 262, 650 (DSP).CrossRefGoogle Scholar
Gonzalez, J. J., (1993) , .CrossRefGoogle Scholar
Worthey, G., Faber, S., Gonzalez, J.J., (1992) ApJ, 398, 69.CrossRefGoogle Scholar