Abstract
| Langan |
|---|
| The impact of gas flows on galaxy scaling relations |
Gas flows play a major role in the evolution of galaxies, but measuring both the gas flow rates and the properties of galaxies (e.g., stellar mass, metallicity and SFR) remains challenging. Using MgII quasar absorption observations of the MusE GAs FLOw and Wind (MEGAFLOW) survey, we have, for the first time, directly constrained gas flows and galaxy properties at z = 0.35-1.4. In this talk, I will present our self-consistent study of the impact of gas flows on key scaling relations, namely the main sequence, the mass-metallicity relation and the fundamental metallicity relation. In particular, we find that the scatter around these scaling relations are driven by long timescales (several hundreds of Myr) fluctuations. I will place these findings in the context of gas-regulator models and discuss why our work implies that larger and more diverse samples of galaxies with simultaneous measurements of gas-phase metallicities and gas flows are critical to understand galaxy evolution. |