A comparison of the time variation of radial abundance gradients from planetary nebulae and open clusters

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dc.creatorMaciel, W. J.
dc.creatorCosta, R. D. D.
dc.creatorFerreira, P. A. L.
dc.date2004-01-07
dc.date.accessioned2026-07-07T02:11:48Z
dc.date.available2026-07-07T02:11:48Z
dc.descriptionThe temporal behaviour of the radial abundance gradients has important consequences on models for the chemical evolution of the Galaxy. We present a comparison of the time variation of the abundance gradients in the Milky Way disk as determined from a sample of planetary nebulae and open clusters. We conclude that the [Fe/H] gradients as measured in open cluster stars strongly support the time flattening of the abundance gradient as recently determined from O/H measurements in planetary nebulae. We estimate the average flattening rate in the time interval 10 Myr < t < 5 Gyr as roughly 0.005 dex kpc-1 Gyr-1.
dc.description8 pages, 1 figure, Tex, uses psfig.sty. To appear in Bull. Brazilian Astron. Soc
dc.identifierhttps://arxiv.org/abs/astro-ph/0401076
dc.identifierhttp://arxiv.org/abs/astro-ph/0401076
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7231
dc.subjectAstrophysics
dc.titleA comparison of the time variation of radial abundance gradients from planetary nebulae and open clusters
dc.typetext

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