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20042006
most citedNew results on the time variation of the radial abundance gradients from planetary nebulae

44 citations · 79 across the 2 of their papers we have counts for

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astro-ph2004

An estimate of the time variation of the abundance gradient from planetary nebulae II. Comparison with open clusters, cepheids and young objects

W. J. Maciel, L. G. Lago, R. D. D. Costa

The temporal behaviour of the radial abundance gradients has important consequences for models of the chemical evolution of the Galaxy. We present a comparison of the time variatio…