%0 Journal Article
%A Camps Fariña, Artemi
%A Sánchez Blázquez, Patricia
%A Roca Fábrega, Santi
%A Sánchez-Fortún Rodríguez, Sebastián
%T Variable metallicity yields as tracers of inflows
%D 2023
%@ 1743-9213
%U https://hdl.handle.net/20.500.14352/102818
%X Pristine gas accretion is expected to be the main driver of sustained star formation in galaxies. We measure the required amount of accreted gas at each moment over a galaxy’s history to produce the observed metallicity at that time given its star-forming history. More massive galaxies tend to have higher accretion rates and a larger drop of the accretion rate towards the present time. Within the same mass bin galaxies that are currently star-forming or in the Green Valley have similar, sustained, accretion histories while retired galaxies had a steep decline in the past. Plotting the T80 of the individual accretion histories, a measure of how sustained they are, versus the stellar mass and current sSFR we see a distribution such that currently star-forming galaxies have sustained or recent accretion and retired galaxies have declined accretion histories.
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