# Acknowledgements¶

J.W.J. and E.J.G. acknowledge financial support from Ohio State University Graduate Fellowships. The developers acknowledge further financial support from National Science Foundation grant AST-1909841. We are grateful for valuable discussion with the Ohio State Astronomy Gas, Galaxies, and Feedback group (2017 - present). J.W.J. acknowledges input from Jenna Freudenburg on the implementation of the cumulative return fraction. The developers thank Paolo Ventura for providing unpublished, theoretically predicted yields from asymptotic giant branch stars at progenitor metallicities of $$Z$$ = 0.001 and 0.002. The developers also thank Ryan J. Cooke for discussion of the primordial helium abundance measured by Pitrou et al. (2021), MNRAS, 502, 2474.