Category: data release

With our second public data release, we have released nearly every FIRE-2 simulation, with nearly every snapshot for each simulation.

In Wetzel et al 2025, we describe the second public data release (DR2) of the FIRE-2 simulations, available at flathub.flatironinstitute.org/fire. DR2 contains nearly every available snapshot from 119 simulations, spanning massive to Milky Way-mass to ultra-faint galaxies, with up to 601 snapshots each across z = 0 to 99, as well as halo/galaxy catalogs with full merger trees, particle tracking, and 3-D formation coordinates for all star particles. DR2 also includes physics variations, including dark-matter-only resimulations, resimulations with a modified ultraviolet background, and resimulations with magnetohydrodynamics (MHD) and cosmic rays.

Nearly all of our FIRE-2 cosmological zoom-in simulations of galaxy formation are now publicly available!

In Wetzel et al 2023 we describe the first public data release (DR1) of the FIRE-2 simulations, available at flathub.flatironinstitute.org/fire. DR1 contains full snapshots from 46 different simulations, spanning massive to Milky Way-mass to ultra-faint galaxies, with up to 39 snapshots each across z = 0 to 10, as well as halo/galaxy catalogs, particle tracking, 3-D formation coordinates for each star particle, and additional data products. We provide a comprehensive description of the FIRE-2 simulations and data products, and we describe various publicly available Python analysis packages to make using these simulations easier.

This DR1 extends our initial data release (DR0) of a subset of FIRE-2 simulations, which contained complete snapshots of 3 of our Latte simulations of Milky Way-like galaxies at z = 0, accompanied by our Ananke synthetic Gaia DR2-like surveys that we created from these simulations (Sanderson et al 2020), which are available via yt Hub at ananke.hub.yt.