Oxygen abundances in the most oxygen-rich spiral galaxies
classification
🌌 astro-ph
keywords
oxygenabundancegalaxiesspiralabundancescentralregionsvalue
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Oxygen abundances in the spiral galaxies expected to be richest in oxygen are estimated. The new abundance determinations are based on the recently discovered ff-relation between auroral and nebular oxygen line fluxes in HII regions. We find that the maximum gas-phase oxygen abundance in the central regions of spiral galaxies is 12+log(O/H)~8.75. This value is significantly lower than the previously accepted value. The central oxygen abundance in the Milky Way is similar to that in other large spirals.
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