Proc. IAU volume 13, issue S334, P381-382 2017 DOI: 10.1017/s1743921317007578 View full text
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Trey V. Wenger, Dana S. Balser, L. D. Anderson, T. M. Bania

Abstract: AbstractThe morphological and chemical structure of the Milky Way today is an important constraint on models of the formation and evolution of the Galaxy. We use H ii regions, the sites of recent massive star formation, to probe both the Galactic spiral structure and the Galactic metallicity structure. H ii regions are the brightest objects in the Galaxy at radio wavelengths and are detected across the entire Galactic disk. We derive the distances to H ii regions using parallax measurements or by deriving kine…

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