The ISO* galactic metallicity gradient revisited

U. Giveon, C. Morisset, A. Sternberg*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Two independent groups (Giveon et al. 2002; Martín-Hernández 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 Galactic disk.

Original languageEnglish
Pages (from-to)501-503
Number of pages3
JournalAstronomy and Astrophysics
Issue number2
StatePublished - Sep 2002


  • Galaxy: abundances
  • ISM: HII regions


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