Distinct First-to-Second Peak Yield Ratios and Timescales Reveal a Sub-dominant Prompt Channel

Yossef Zenati, Paz Beniamini, Kenta Hotokezaka

Stellar abundances reveal non-monotonic [Y/Eu] and [Sr/Eu] evolution, a systematic decline with increasing [Eu/H] at low metallicity, a minimum at $[Eu/H]\sim -0.3$ and then…