S ⁵: The Destruction of a Bright Dwarf Galaxy as Revealed by the Chemistry of the Indus Stellar Stream

The recently discovered Indus stellar stream exhibits a diverse chemical signature compared to what is found for most other streams due the abundances of two outlier stars, Indus$\_$0 and Indus$\_$13. Indus$\_$13, an extreme enhancement in rapid neutron-capture ($r$-)process elements with $\mathrm{[Eu/Fe]} = +1.81$. It thus provides direct evidence accreted nature $r$-process enhanced stars. In this paper we present detailed analysis revealing star be slightly actinide poor. outlier, Indus$\_0$, displays globular cluster-like high N, Na, Al abundances, while rest stars show compatible dwarf galaxy origin. Hence, Indus$\_0$ first fully disrupted containing cluster. We use discuss progenitor which was likely chemically evolved system, mass somewhere range from Ursa Minor Fornax.