How do galaxies in groups run out of gas?

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The observed properties of galaxies are known to depend on their surrounding local environment. However, astronomers are still struggling to understand to what extent galaxy evolution is shaped by nurture, and which are the dominant physical processes involved. The key to resolving this outstanding issue is to study the cold gas component, and its relation to star formation, in galaxies across a range of environments. This project will combine an unrivalled data set, which includes the most sensitive measurements of atomic and molecular hydrogen gas currently available, with state-of-the-art numerical simulations with the aim of revealing the physical mechanisms responsible for transforming galaxies in the group environment.