The Fall of a Giant. Chemical evolution of Enceladus, alias the Gaia Sausage

12 May 2019 Vincenzo Fiorenzo Spitoni Emanuele Calura Francesco Matteucci Francesca Aguirre Victor Silva Miglio Andrea Cescutti Gabriele

We present the first chemical evolution model for Enceladus, alias the Gaia Sausage, to investigate the star formation history of one of the most massive satellites accreted by the Milky Way during a major merger event. Our best chemical evolution model for Enceladus nicely fits the observed stellar [$\alpha$/Fe]-[Fe/H] chemical abundance trends, and reproduces the observed stellar metallicity distribution function, by assuming low star formation efficiency, fast infall time scale, and mild outflow intensity... (read more)

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