Stellar Bars in Dark Matter Dominated Galaxies

We present new optical BVRI images of four barred low surface brightness disk galaxies, UGC 628, F568-1, F568-3, and F563-V2, taken with the ARCTIC imager on the 3.5m APO telescope. We use these images in combination with Spitzer archival 3.6-micron data to characterize three parameters: the bar length, strength, and pattern speed. We find comparable bar lengths between the I-band and 3.6-micron images using three different techniques. We find lower limits on the bar strengths of our galaxies that are comparable to those found in high surface brightness galaxies. Using phase profiles of Fourier transforms of our B and I-band and 3.6-micron images, we find relative bar pattern speeds that are considered too "fast" for dark matter dominated objects. We discuss the implications of our findings both in the context of LCDM as well as with the bars in high surface brightness galaxies.