Stellar Populations and the Star Formation Histories of LSB Galaxies—Part I: Optical and Hα Imaging

Figure 9

Histogram of H𝛼 luminosities (regular and normalized histograms). The black curve is this sample, the red curve is the data from Hunter and Elmegreen for bright dwarf irregulars, and the green curve is the data from Van Zee, a sample of HI-rich dwarf galaxies. Arrows mark the mean value for each sample, and the diamonds mark the median. Our sample is noticeably fainter than Hunter and Elmegreen’s sample primarily due to the nature of their sample selection. Our luminosities are similar to van Zee’s, with a slightly lower mean 𝐿(H𝛼).