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In this contribution, we reexamine the radial oxygen abundance gradient inthe strongly barred spiral galaxy NGC 3359, for which, using an imagingspectrophotometric technique, Martin & Roy detected a break near the effectiveradius of the galaxy. We have new emission line flux measurements of HIIregions in NGC 3359 from spectra obtained with the Subaru telescope to furtherinvestigate this claim. We find that there are small systematic variations inthe line ratios determined from narrow-band imaging as compared to ourspectroscopic measurements. We derive and apply a correction to the line ratiosfound by Martin & Roy and statistically examine the validity of the gradientbreak proposed for NGC 3359 using recently developed metallicity diagnostics.We find that, with a high degree of confidence, a model with a break fits thedata significantly better than one without it. This suggests that the presenceof a strong bar in spiral galaxies can generate measurable changes in theradial distribution of metals.

Reexamination of the Radial Abundance Gradient Break in NGC 3359