SIMBAD references

1996A&A...313..924C - Astronomy and Astrophysics, volume 313, 924-928 (1996/9-3)

Abundances in type I planetary nebulae: is the galactic disk presently oxygen deficient?

COSTA R.D.D., DE FREITAS PACHECO J.A. and DE FRANCA J.A.Jr

Abstract (from CDS):

We report new spectroscopic observations for a sample of "bona fidae" type I planetary nebulae, which satisfy kinematical, distance to the galactic plane and morphological criteria. Special care was taken to estimate physical parameters as electron temperature and density. The mean sample oxygen abundance ε(O)=8.64±0.23 confirms our earlier results: a deficiency of about 0.25dex with respect to the solar value. We emphasize that the present result is entirely compatible with new stellar (Cunha & Lambert 1994) and diffuse gas data (Meyer et al. 1994) recently obtained in the Orion complex.

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Journal keyword(s): planetary nebulae: general - stars: abundances - Galaxy: abundances

VizieR on-line data: <Available at CDS (J/A+A/313/924): table2 table2.tex>

Simbad objects: 13

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