SIMBAD references

2010ApJ...724..791P - Astrophys. J., 724, 791-798 (2010/November-3)

On the O/H, Mg/H, Si/H, and Fe/H gas and dust abundance ratios in galactic and extragalactic H II regions.


Abstract (from CDS):

We derive the Mg/H ratio in the Orion nebula and in 30 Doradus. We also derive the O/H and the Fe/O ratios in the extremely metal-poor galaxy SBS 0335-052 E. We estimate the dust depletions of Mg, Si, and Fe in Galactic and extragalactic H II regions. From these depletions we estimate the fraction of O atoms embedded in dust as a function of the O/H ratio. We find an increasing depletion of O with increasing O/H. The O depletion increases from about 0.08 dex, for the metal poorest H II regions known, to about 0.12 dex, for metal-rich H II regions. This depletion has to be considered to compare nebular with stellar abundances.

Abstract Copyright:

Journal keyword(s): galaxies: abundances - galaxies: individual: SBS 0335-052 - galaxies: ISM - H II regions - ISM: abundances

Simbad objects: 13

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