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Line-Strength Gradients in Elliptical Galaxies

Published online by Cambridge University Press:  04 August 2017

Roger L. Davies  and
Elaine M. Sadler
Roger L. Davies
Affiliation:
Kitt Peak National Observatory, National Optical Astronomy Observatories, P.O. Box 26732, Tucson, Arizona 85726-6732
Elaine M. Sadler
Affiliation:
Kitt Peak National Observatory, National Optical Astronomy Observatories, P.O. Box 26732, Tucson, Arizona 85726-6732

Abstract

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We have measured line-strength indices as a function of radius in several elliptical galaxies. All of them show strong radial gradients in Mg, but much weaker gradients in Fe and Hβ. The isophotes and contours of constant line-strength have the same flattening. More luminous galaxies have shallower gradients, contrary to the prediction of models of dissipative collapse. Most of the galaxies observed show weak central emission which can partially fill the Balmer absorption lines.

Type
Posters
Information
Symposium - International Astronomical Union , Volume 127: Structure and Dynamics of Elliptical Galaxies , 1987 , pp. 441 - 442
Copyright
Copyright © Reidel 1987 

References

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