Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...494..247a&link_type=abstract
Astrophysical Journal v.494, p.247
Astronomy and Astrophysics
Astronomy
43
Galaxy: Abundances, Galaxy: Evolution, Galaxy: Kinematics And Dynamics, Ism: Planetary Nebulae: General, Stars: Evolution
Scientific paper
We present a chemodynamical evolution model of the Galaxy to determine chemical abundance gradients of different stellar populations. From this model we have determined the abundance gradients expected for H II regions, as well as for planetary nebulae of different ages and different kinematical properties. We have compared the model predicted gradients with those derived from planetary nebulae (PNs) of types I, II, and III. From this comparison we conclude that only about half of the stars evolving toward the white dwarf stage produce PNs and that the less massive stars are less likely to produce PNs. Other arguments supporting the previous conclusions are presented.
Allen Christine
Carigi Leticia
Peimbert Manuel
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