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Planetary Nebulae: A Probe of the Galaxies Evolution up to the Hubble Time

Published online by Cambridge University Press:  01 August 2006

A. F. Kholtygin
Affiliation:
Astronomical Institute of Saint-Petersburg, University, Russia email: afk@astro.spbu.ru
Yu. V. Milanova
Affiliation:
Astronomical Institute of Saint-Petersburg, University, Russia email: afk@astro.spbu.ru
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Chemical evolution of the galactic and extragalactic planetary nebulae (PNe) system beginning from the early age of the Galaxy is investigated. We determine the radial and vertical abundance gradients for C, N, O, Ne, Ar, Cl and S in a dependence on mass and age of the progenitor stars of the nebula. In the Table 1 we compare the galactic abundance gradients for O and Ne for our and neigbour galaxies.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2007

References

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