Other
Scientific paper
Mar 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010iaus..265..313m&link_type=abstract
Chemical Abundances in the Universe: Connecting First Stars to Planets, Proceedings of the International Astronomical Union, IAU
Other
Galaxies: Evolution, Planetary Nebulae: General, Magellanic Clouds
Scientific paper
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.
Kholtygin Alexander
Milanova Yulia
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