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Chemical Abundances of Planetary Nebulae Towards the Galactic Anticenter
Published online by Cambridge University Press: 26 May 2016
Abstract
We report the results of spectrophotometric determinations of chemical abundances for a planetary nebulae sample located outside the solar circle, with galactocentric distances between 8 and 14 kpc. Our results show a decreasing gradient for R>10 kpc and a possible dependence of the gradient with the age of the progenitors (Work supported by FAPESP).
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- Part VI: The Ionized Gas in Planetary Nebulae
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- Copyright © Astronomical Society of the Pacific 2003