Iron Depletion into Dust Grains in Galactic Planetary Nebulae

Details Iron Depletion into Dust Grains in Galactic Planetary Nebulae Iron Depletion into Dust Grains in Galactic Planetary Nebulae

2010-09-20

arxiv.org/abs/1009.3945v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

4 pages, 1 figure, to appear in the proceedings of the conference "Asymmetric Planetary Nebulae V", eds. Zijlstra, et al., edi

Scientific paper

We present preliminary results of an analysis of the iron depletion factor into dust grains for a sample of 20 planetary nebulae (PNe) from the Galactic bulge. We compare these results with the ones we obtained in a prior analysis of 28 Galactic disk PNe and 8 Galactic H II regions. We derive high depletion factors in all the objects, suggesting that more than 80% of their iron atoms are condensed into dust grains. The range of iron depletions in the sample PNe covers about two orders of magnitude, and we explore here if the differences are related to the PN morphology. However, we do not find any significant correlation.

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