New H i scaling relations to probe the H i content of galaxies via global H i-deficiency maps

We present new multiwavelength scaling relations between the neutral hydrogen content (H I) and the stellar properties of nearby galaxies selected from the H I Parkes All-Sky Survey (HIPASS). We use these new scaling relations to investigate the environmental dependence of the H I content of galaxies. We find that galaxies in high-density environments tend to have on average less H I than galaxies with the same stellar mass in low-density environments.