Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-05-09
Astronomy and Astrophysics
Astrophysics
8 pages, 2 figures, invited review to the IAU 234 Conference "Planetary Nebulae in Our Galaxy and Beyond", M. J. Barlow & R. H
Scientific paper
10.1017/S1743921306002687
The Local Group (LG) represents the best environment to study in detail the PN population in a large number of morphological types of galaxies. The closeness of the LG galaxies allows to investigate the faintest side of the PN luminosity function and to detect PNe also in the less luminous galaxies, the dwarf galaxies, where a small number of them is expected. A review of the results of the most recent imaging surveys in the LG is presented. Some applications of the surveys for PNe to the study of the star formation history of the host galaxies are analyzed. In addition, these new observational data are an invaluable resource for follow-up spectroscopy to derive the chemical properties of not only PNe, but also other important emission-line sources like HII regions. These are fundamental tools for the discussion of the chemical evolution of the host galaxies, mapping the history of their chemical enrichment at different epochs. The latest results on this subject are presented.
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