#### Project summary

The FIRE: Feedback In Realistic Environments project seeks to develop and explore cosmological simulations of galaxy formation that directly resolve the interstellar medium of individual galaxies while capturing their cosmological environment. FIRE aims to improve the predictive power of galaxy formation simulations by directly informing the implementation of sub-resolution processes with explicit small-scale models, thus reducing the reliance on adjustable model parameters.

The FIRE simulations are used to address a wide array of questions in galaxy formation and intergalactic medium science, including the regulation of galaxy growth by “feedback,” the properties of galactic inflows and outflows, the morphological transformation of galaxies, the quenching of star formation in massive galaxies and the need for active galactic nucleus feedback, the escape fraction of ionizing photons from galaxies, and the effects of stellar feedback on dark matter halos.

We release FIRE-2 data under the Creative Commons BY 4.0 license. If you use these data, we request that you cite as follows: “We use simulations from the FIRE-2 public data release (Wetzel et al. 2022). The FIRE-2 cosmological zoom-in simulations of galaxy formation are part of the Feedback In Realistic Environments (FIRE) project, generated using the Gizmo code (Hopkins 2015) and the FIRE-2 physics model (Hopkins et al. 2018a).

Any publication using these data should cite the relevant paper(s) linked below:

#### Core FIRE-2 Runs

Snapshots (HDF5 format) and metadata for FIRE-2 simulations from Hopkins et al. (2018), Wetzel et al. (2016), and Garrison-Kimmel et al. (2019). z = 0, 1, 2, 3, and 4 (snapshot numbers 600, 277, 172, 120, and 88) are available.

#### Massive halos with black hole growth

Snapshots (HDF5 format) for FIRE-2 simulations from Anglés-Alcázar et al. (2017) are available at z = 1, 2, 3, 4, 5, 6 (snapshot numbers 277, 172, 120, 88, 67, 52). These halos are selected from the A-series of the FIRE-1 MassiveFIRE suite (Feldmann et al. 2016, 2017). Please refer to Feldmann et al. (2016, 2017) for information about the general selection strategy and halo growth histories of the MassiveFIRE zoom-in simulations. These halos have halo masses $$M_{\rm vir} = 10^{12-13.5} M_{\odot}$$ and were simulated including massive black hole growth but no AGN feedback, resulting in overly massive galaxies with ultra-dense nuclear stellar distributions at late times (Wellons et al. 2020, Parsotan et al. 2021, Anglés-Alcázar et al. 2021).

Any publication using these data should cite Anglés-Alcázar et al. (2017).

#### High-z Suite

Snapshots for the suite of z = 5-6 simulations from Ma et al. (2018).

Data