机译:Planetary nebulae and H ii regions in the spiral galaxy NGC 300: Clues on the evolution of abundance gradients and on AGB nucleosynthesis
LUTH, Observatoire de Paris, CNRS, Université Paris Diderot, Place Jules Janssen, 92190 Meudon, France;
Instituto de Astronomía, Universidad Nacional Autónoma de Mexico, Apdo. Postal 70264, Mex. D.F., 04510 Mexico, Mexico;
Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, HI 96822, United StatesESO, Karl-Schwarzchild Str. 2, 85748 Garching bei München, Germany;
Galaxies: abundances; Hiiregions; Planetary nebulae: general; Stars: AGB and post-AGB;