HI Deficiency in Group Galaxies

For many years now astronomers have studied the relationship between environment and galaxy evolution. For my project I looked at the effect that being in a group (intermediate density) environment has on the atomic gas (HI) content of member galaxies. Observations were obtained at the Arecibo Telescope in Puerto Rico during the spring of 2014. The galaxies for this survey were specifically chosen because they were believed to be deficient in HI. I compare the HI deficiencies of these galaxies to other galaxies in the groups and the surrounding environments. I combine data from the ALFALFA (HI), GALEX (ultraviolet), and SDSS (optical) surveys and determine upper limits on the mass of HI for galaxies that did not have detections. The results can be contrasted to results from cluster (dense) environments to test the importance of environmental effects on galaxy evolution in a range of environments.