Proc. IAU volume 13, issue S334, P275-276 2017 DOI: 10.1017/s1743921317007530 View full text
Dana S. Balser, Trey V. Wenger, T. M. Bania, L. D. Anderson

Abstract: AbstractHii regions are the sites of massive star formation and are the archetypal tracers of spiral arms. Because of their short lifetimes (<10 Myr) their abundances provide a measure of the nuclear processing of many stellar generations. Here we review our ongoing efforts to explore the metallicity structure of the Galactic disk by observing radio recombination line (RRL) and thermal radio continuum emission toward Hii regions. The RRL-to-continuum ratio provides an accurate measure of the electron te…

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