1999/10/27 by W. J. Maciel, Walter J. Maciel, Maciel, W. J.
Physics and Astronomy · #Astro and Planetary Science #Astronomical and nuclear sciences #Astrophysics (astro-ph) #FOS: Physical sciences #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9910496
4 pages, 3 postscript figures, Latex, uses psfig.sty, to be published in Astronomy and Astrophysics, also available at http://www.iagusp.usp.br/~maciel/index.html
arxiv created 1999/10/27 · openalex publication_date 1999/10/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The O/H metallicity distribution of different samples of planetary nebulae in\nthe bulge of the Milky Way and M31 are compared. O/H abundances are converted\ninto [Fe/H] metallicity by the use of theoretical [O/Fe] x [Fe/H] relationships\nboth for the bulge and the solar neighbourhood. It is found that these\nrelationships imply an offset of [Fe/H] abundances by a factor up to 0.5 dex\nfor bulge nebulae. Systematic errors in the O/H abundances as suggested by some\nrecent recombination line work, ON cycling and statistical uncertainties are\nunable to explain the observed offset, suggesting that the adopted relationship\nfor the bulge probably overestimates the oxygen enhancement relative to iron.\n