THE OXYGEN ABUNDANCE IN THE SOLAR NEIGHBORHOOD

@article{Rodriguez2011THEOA,
  title={THE OXYGEN ABUNDANCE IN THE SOLAR NEIGHBORHOOD},
  author={M'onica Rodr'iguez and G Delgado-Inglada},
  journal={The Astrophysical Journal},
  year={2011},
  volume={733}
}
We present a homogeneous analysis of the oxygen abundance in five H II regions and eight planetary nebulae (PNe) located at distances lower than 2 kpc and with available spectra of high quality. We find that both the collisionally excited lines (CELs) and recombination lines imply that the PNe are overabundant in oxygen by about 0.2 dex. An explanation that reconciles the oxygen abundances derived with CELs for H II regions and PNe with the values found for B stars, the Sun, and the diffuse… Expand

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References

SHOWING 1-10 OF 41 REFERENCES
Chemical Composition of Two H II Regions in NGC 6822 Based on VLT Spectroscopy
We present long-slit spectrophotometry of regions V and X of the Local Group irregular galaxy NGC 6822. The data consist of VLT FORS observations in the 3450-7500 A range. We have obtained electronExpand
A deep survey of heavy element lines in planetary nebulae – II. Recombination-line abundances and evidence for cold plasma
In our Paper 1, we presented deep optical observations of the spectra of 12 Galactic planetary nebulae (PNe) and three Magellanic Cloud PNe, carrying out an abundance analysis using the collisionallyExpand
The O++/H+ abundance ratio in gaseous nebulae derived from recombination lines.
We present O +2 /H + values for the Orion Nebula, M17, and NGC 6572 based on O II recombination lines, which are independent of the temperature structure of the observed nebulae. In the H II regionsExpand
Oxygen Depletion in the Interstellar Medium: Implications for Grain Models and the Distribution of Elemental Oxygen
This paper assesses the implications of a recent discovery that atomic oxygen is being depleted from diffuse interstellar gas at a rate that cannot be accounted for by its presence in silicate andExpand
A deep survey of heavy element lines in planetary nebulae – I. Observations and forbidden-line densities, temperatures and abundances
We present deep optical spectrophotometry of 12 Galactic planetary nebulae (PNe) and three Magellanic Cloud PNe. Nine of the Galactic PNe were observed by scanning the slit of the spectrograph acrossExpand
Temperature Structure and Metallicity in H II Regions
The metallicities implied by collisionally excited lines (CELs) of heavy elements in H II regions are systematically lower than those implied by recombination lines (RLs) by factors of ~2,Expand
Chemical abundances of planetary nebulae from optical recombination lines¿ II. Abundances derived from collisionally excited lines and optical recombination lines
In Paper I, we presented spectrophotometric measurements of emission lines from the ultraviolet (UV) to the far-infrared for 12 Galactic planetary nebulae (PNe) and derived nebular thermal andExpand
THE IRON ABUNDANCE IN GALACTIC PLANETARY NEBULAE
We constrain the iron abundance in a sample of 33 low-ionization Galactic planetary nebulae (PNe) using [Fe III] lines and correcting for the contribution of higher ionization states with ionizationExpand
Physical conditions in Photo-Dissociation Regions around Planetary Nebulae
We present observations of the infrared fine-structure lines of [Si II] (34.8 mum), [O I] (63.2 and 145.5 mum) and [C II] (157.7 mum) obtained with the ISO SWS and LWS spectrographs of nine PlanetaryExpand
Chemical abundances in the protoplanetary disc LV 2 (Orion): clues to the causes of the abundance anomaly in H II regions
Optical integral field spectroscopy of the archetype protoplanetary disc LV 2 in the Orion nebula is presented, taken with the Very Large Telescope (VLT) FLAMES/Argus fibre array. The detection ofExpand
...
1
2
3
4
5
...