W. J. Maciel -
Abstract #156
ABUNDANCE GRADIENTS IN THE OUTER GALACTIC DISK
W. J. Maciel, C. Quireza
Galaxy evolution, ed. M. Spite, Astrophys. Space Sci. 265, 269–270 (1999)
Radial abundance gradients of the element ratios O/H, Ne/H, S/H, and Ar/H are determined for a sample of disk planetary nebulae, emphasizing the behaviour of th gradients at large galactocentric distances.
