SIMBAD references

1999A&A...345..629M - Astronomy and Astrophysics, volume 345, 629-634 (1999/5-2)

Abundance gradients in the outer galactic disk from planetary nebulae.

MACIEL W.J. and QUIREZA C.

Abstract (from CDS):

Radial abundance gradients of the element ratios O/H, Ne/H, S/H, and Ar/H are determined on the basis of a sample of disk planetary nebulae. The behaviour of the gradients at large distances from the galactic centre, R>R0=7.6kpc, is emphasized. It is concluded that the derived gradients are consistent with an approximately constant slope in the inner parts of the Galaxy, and some flattening for distances larger than R0. A comparison is made with previous determinations using both photoionized nebulae and young stars, and some consequences on theoretical models for the chemical evolution of the galactic disk are discussed.

Abstract Copyright:

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

VizieR on-line data: <Available at CDS (J/A+A/345/629): table1.dat table1.ps table1.tex>

Simbad objects: 130

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2020.11.29-18:58:50

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