Abundance Gradients in M33: the Use of Planetary Nebulae
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
Stasińska, G. et al.
Fecha de publicación:
11
2005