Stasińska, G.; Vílchez, J. M.; Pérez, E.; Corradi, R. L. M.; Mampaso, A.; Magrini, L.
Bibliographical reference
PLANETARY NEBULAE AS ASTRONOMICAL TOOLS: International Conference on Planetary Nebulae as Astronomical Tools. AIP Conference Proceedings, Volume 804, pp. 262-264 (2005).
Advertised on:
11
2005
Citations
2
Refereed citations
2
Description
We present our observations of several planetary nebulae in the central
zones of the spiral galaxy M33. We combine the abundances we derived for
our objects with those obtained by Magrini et al. (2004) for a sample of
PNe at larger galactocentric distances. We compare the radial abundance
distribution derived from planetary nebulae with the one derived by HII
regions and massive stars. We discuss the uncertainties and biases of
the abundance derivations in planetary nebulae and HII regions. We show
that planetary nebulae, although difficult to observe, are an important
tool to investigate the chemical evolution of galaxies.