Zinc abundances of planetary nebulae

Abstract

Zinc is a useful surrogate element for measuring Fe/H as, unlike iron, it is not depleted in the gas phase media. Zn/H and O/Zn ratios have been derived using the [Zn IV] emission line at 3.625um for a sample of nine Galactic planetary nebulae, seven of which are based upon new observations using the VLT. Based on photoionization models, O/O++ is the most reliable ionisation correction factor for zinc that can readily be determined from optical emission lines, with an estimated accuracy of 10% or better for all targets in our sample. The majority of the sample is found to be sub-solar in [Zn/H]. [O/Zn] in half of the sample is found to be consistent with Solar within uncertainties, whereas the remaining half are enhanced in [O/Zn]. [Zn/H] and [O/Zn] as functions of Galactocentric distance have been investigated and there is little evidence to support a trend in either case.

arXiv commentAccepted MNRAS, 11 pages, 8 figures

References in corpus (20)

• The chemical composition of the Sun
• Nucleosynthesis of Zinc and Iron-Peak Elements in Pop III Type II Supernovae : Comparison with abundances of Very Metal-Poor Halo Stars
• The 2013 Release of Cloudy
• The Galactic Thick Disk Stellar Abundances
• The Diffuse Interstellar Clouds toward 23 Orionis
• The Galactic structure and chemical evolution traced by the population of planetary nebulae
• Nucleosynthesis Predictions for Intermediate-Mass AGB Stars: Comparison to Observations of Type I Planetary Nebulae
• Elemental abundances of Galactic bulge planetary nebulae from optical recombination lines
• Integrated spectrum of the planetary nebula NGC 7027
• Planetary nebulae abundances and stellar evolution
• Rusty old stars: a source of the missing interstellar iron?
• Understanding and reducing statistical uncertainties in nebular abundance determinations
• Planetary nebulae in the direction of the Galactic bulge: On nebulae with emission-line central stars
• Planetary nebulae abundances and stellar evolution II
• The Iron abundance in Galactic Planetary Nebulae
• The [Zn/Fe] -- [Fe/H] trend for disk and halo stars
• Chemical Abundances and Dust in Planetary Nebulae in the Galactic Bulge
• White dwarf masses derived from planetary nebulae modelling
• The FUSE Spectrum of the Planetary Nebula SwSt 1: Evidence for Inhomogeneities in the Gas and Dust
• Disk evaporation in a planetary nebula

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• Discovery of Rubidium, Cadmium, and Germanium Emission Lines in the Near-Infrared Spectra of Planetary Nebulae
• The Abundances of Light Neutron-Capture Elements in Planetary Nebulae III. The Impact of New Atomic Data on Nebular Selenium and Krypton Abundance Determinations
• Abundances in Galactic Bulge planetary nebulae from optical, ultraviolet and infrared observations
• Infrared line emissions from atoms and atomic ions in NGC 7027: improved wavelength determinations for infrared metal lines and a probable detection of Zn${}^{5+}$
• Gaseous abundances in planetary nebulae: What have we learned in the past five years?