Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009rmxac..35...39t&link_type=abstract
XII Latin American IAU Regional Meeting (Eds. G. Magris, G. Bruzual, & L. Carigi) Revista Mexicana de Astronomía y Astrofísica (
Astronomy and Astrophysics
Astronomy
Hii Regions, Planetary Nebulae
Scientific paper
In gaseous nebulae the abundances of heavy elements derived from recombination lines are systematically higher than those derived from collisionally excited lines. The possible explanations to obtain compatible solutions are: either to attribute the difference to the presence of temperature inhomogeneities or to the presence of dense clumps of colder enriched material. We have obtained long slit echelle spectrograms in several planetary nebulae to try to shed light on this topic. We present preliminary results for NGC 6543.
Arrieta Anabel
Georgiev Lachezar
Richer Michael
Torres-Peimbert Silvia
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