Previous abstract Next abstract
Session 108 - HII Regions.
Display session, Thursday, January 18
North Banquet Hall, Convention Center
We obtain nitrogen abundances in the \ionH2 regions of selected spiral galaxies by using a new algorithm developed from grids of photoionization models. The new method requires only the observation of optical [\ionN2], [\ionO2], and [\ionO3] lines. We show the self-consistency of the new method, and also the agreement with more detailed modeling of individual \ionH2 regions. Gradients in [N/O] against effective radius are presented for a well-observed subset of galaxies from a Vila-Costas and Edmunds sample (\citeve93).
Program listing for Thursday