The Helix Nebula as seen by the Local Volume Mapper
I recently tasked myself with a project: using the publicly available data of the Helix Nebula from the SDSS-V Local Volume Mapper to measure emission lines. This is something I …
The Peculiar "Bulge" of NGC 5474
What is it? Hint: It's not a bulge! (Probably.)
Calculating Uncertainties on Strong-line Abundances
Using new data for M101, I show how to use the method outlined in Moustakas et al. (2010) to calculate uncertainties on strong-line abundances in a statistically reasonable way.