Abstract
Eleven Planetary Nebulae (PNe) in the spiral galaxy M 33 have been studied with the CLOUDY 94.00 photoionization code (Ferland et al. 1998) using observations obtained with the 4.2 m WHT (La Palma, Spain) equipped with AF2/WYFFOS at a resolution of 3.0Å/pixel in the spectral range 4300 to 7380 Å. A galactocentric gradient in O/H is suggested. The average [O/H] is very close to the same quantity from H II regions (Vílchez et al. 1988).
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References
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Perinotto, M., Magrini, L., Mampaso, A., Corradi, R.L. (2006). A Study of Chemical Abundances of Planetary Nebulae in M33. In: Stanghellini, L., Walsh, J.R., Douglas, N.G. (eds) Planetary Nebulae Beyond the Milky Way. ESO ASTROPHYSICS SYMPOSIA European Southern Observatory. Springer, Berlin, Heidelberg . https://doi.org/10.1007/11604792_34
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DOI: https://doi.org/10.1007/11604792_34
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