Journal article

The growth of discs and bulges during hierarchical galaxy formation - II. Metallicity, stellar populations and dynamical evolution

C Tonini, SJ Mutch, JSB Wyithe, DJ Croton

Monthly Notices of the Royal Astronomical Society | Oxford University Press (OUP) | Published : 2017


We investigate the properties of the stellar populations of model galaxies as a function of galaxy evolutionary history and angular momentum content. We use the new semi-analytic model presented in Tonini et al. This new model follows the angular momentum evolution of gas and stars, providing the base for a new star formation recipe, and treatment of the effects of mergers that depends on the central galaxy dynamical structure. We find that the new recipes have the effect of boosting the efficiency of the baryonic cycle in producing and recycling metals, as well as preventing minor mergers from diluting the metallicity of bulges and ellipticals. The model reproduces the stellar mass–stellar ..

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Awarded by Australian Research Council

Funding Acknowledgements

We wish to thank the anonymous referee for their useful comments and suggestions. CT wishes to thank Michele Cappellari, Julien Devriendt, Eric Bell, Martin Bureau, Nic Scott, Rosa Gonzalez Delgado and Benedetta Vulcani, for interesting discussions and helpful suggestions. This work was funded by the Australian Research Council through the ARC DP140103498.