Abstract
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, the faint end of the main sequence, and the ability to track black holes in dwarf galaxies. SIMBA-C also matches better with 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]. SIMBA-C thus opens up new avenues to constrain feedback models using detailed chemical abundance measures across cosmic time.
Original language | English |
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Pages (from-to) | 1061-1076 |
Number of pages | 16 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 525 |
Issue number | 1 |
Early online date | 8 Aug 2023 |
DOIs | |
Publication status | Published - 30 Oct 2023 |
Keywords
- astro-ph.GA
- galaxies: formation
- galaxies: evolution
- ISM: abundances
- software: simulations
- galaxies: abundances
- supernovae: general