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The chemical abundances of Planetary Nebulae in Centaurus-A (NGC 5128)
Published online by Cambridge University Press: 25 May 2016
Extract
Abundances in early-type galaxies are measured from the analysis of stellar spectra (e.g. colour indices, Peletier et al, 1990). The presence of many planetary nebulae (PN) in early-type galaxies provides an independent measure of abundances for the old stellar population and allows the spread in abundances to be sampled at a range of galacto-centric distances. PN are feasible for this project since the nebular O, Ne and S abundances in most PN reflect that of the progenitor star.
- Type
- VIII. Planetary Nebulae in Extragalactic Systems
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- Copyright © Kluwer 1997