The ISO Galactic Metallicity Gradient Revisited

Details The ISO Galactic Metallicity Gradient Revisited The ISO Galactic Metallicity Gradient Revisited

2002-07-22

arxiv.org/abs/astro-ph/0207459v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:20021059

Two independent groups (Giveon et al. 2002; Martin-Hernandez et al. 2002) have recently investigated the Galactic metallicity gradient as probed by ISO observations of mid-infrared emission lines from HII regions. We show that the different gradients inferred by the two groups are due to differing source selection and differing extinction corrections. We show that both data sets in fact provide consistent results if identical assumptions are made in the analysis. We present a consistent set of gradients in which we account for extinction and variation in electron temperature across the disk.

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