Speaker
Description
We introduce a new chemical enrichment and stellar feedback model into GIZMO, using the SIMBA sub-grid models as a base. Based on the state-of-the-art chemical evolution model of Kobayashi et al., SIMBA-C tracks 34 elements from H→Ge and removes SIMBA’s instantaneous recycling approximation. Furthermore, we make some minor improvements to SIMBA’s base feedback models. SIMBA-C provides significant improvements on key diagnostics such as the knee of the z = 0 galaxy stellar mass function, as well as providing a better match to recent observations of the mass-metallicity relation at z = 0,2. By not assuming instantaneous recycling, SIMBA-C provides a much better match to galactic abundance ratio measures such as [O/Fe] and [N/O]. Therefore, our new model allows for much more accurate galactic chemical evolution tracking through cosmic time in the simulation. We also demonstrate the impact that these newly created metals have on the global scaling relation of various X-ray properties (luminosity, temperature, mass, entropy, etc.) of different large-scale environments such as groups and clusters, and their evolution through cosmic time.
