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Planetary nebulae in the inner Milky Way

Published online by Cambridge University Press:  09 March 2010

Oscar Cavichia ,
Roberto D. D. Costa  and
Walter J. Maciel
Oscar Cavichia
Affiliation:
IAG, University of São Paulo, 05508-900, São Paulo-SP, Brazil. email: [email protected]
Roberto D. D. Costa
Affiliation:
IAG, University of São Paulo, 05508-900, São Paulo-SP, Brazil.
Walter J. Maciel
Affiliation:
IAG, University of São Paulo, 05508-900, São Paulo-SP, Brazil.
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Abstract

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New abundances of planetary nebulae located towards the bulge of the Galaxy are derived based on observations made at LNA (Brazil). We present accurate abundances of the elements He, N, S, O, Ar, and Ne for 56 PNe located towards the galactic bulge. The data shows a good agreement with other results in the literature, in the sense that the distribution of the abundances is similar to those works. From the statistical analysis performed, we can suggest a bulge-disk interface at 2.2 kpc for the intermediate mass population, marking therefore the outer border of the bulge and inner border of the disk.

Keywords

Planetary nebulaechemical abundanceschemical evolutionMilky Way
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S265: Chemical Abundances in the Universe: Connecting First Stars to Planets , August 2009 , pp. 354 - 355
Copyright
Copyright © International Astronomical Union 2010

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