H-alpha measurements

Yesterday was a low-research day, but I did re-start Quintero's ancient code to measure H-alpha line measurements and A-star and K-star contributions to galaxy spectra on all of the SDSS spectra to date. Despite the age of the code and subsequent changes to the SDSS data reduction pipelines and outputs and the fact that it has to run without crashing on 1.2 million SDSS spectra, Quintero's code just works. Now that's what I like about my collaborators! I need the spectral measurements to compare with the central stellar densities in my project to take a stab at a "continuity analyis" of the galaxy population.

Today I am off to Columbia to work with Bell and Johnston on our nascent paper on substructure in the MW halo.

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