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Planetary nebulae and star formation history in the Galactic disk and bulge

Published online by Cambridge University Press:  09 March 2010

Yulia Milanova  and
Alexander Kholtygin
Yulia Milanova
Affiliation:
Astronomical Institute of St.Petersburg State University, Russia email: [email protected]
Alexander Kholtygin
Affiliation:
Astronomical Institute of St.Petersburg State University, Russia email: [email protected]
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Abstract

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The modern observations of the planetary nebulae (PNe) were used to create a new catalogue of He, C, N, O, Ne, S and some other element abundances for more than 300 Galactic and extragalactic PNe. This catalogue was a start point for studying the star formation history in the Galactic disk. We have found that He, C, N and O abundances in the thin disk PNe are very close to those in bulge PNe. We also established that the abundances of the same elements in the PNe belonging the halo of the Milky Way and the Magellanic Clouds are similar. We have estimated the mean ages of the progenitors of PNe in the thin and thick disks and in the bulge. The evidences in the favor of the suggestion that the formation of the intermediate-mass star began in bulge and only then continued in the thin disk were found.

Keywords

galaxies: evolutionplanetary nebulae: generalMagellanic Clouds
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. 313 - 316
Copyright
Copyright © International Astronomical Union 2010

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