Public Data Release of the FIRE-2 Cosmological Zoom-in Simulations of Galaxy Formation

Andrew Wetzel, Christopher C. Hayward, Robyn E. Sanderson, Xiangcheng Ma, Daniel Anglés-Alcázar, Robert Feldmann, T. K. Chan, Kareem El-Badry, Coral Wheeler, Shea Garrison-Kimmel, Farnik Nikakhtar, Nondh Panithanpaisal, Arpit Arora, Alexander B. Gurvich, Jenna Samuel, Omid Sameie, Viraj Pandya, Zachary Hafen, Cameron Hummels, Sarah LoebmanMichael Boylan-Kolchin, James S. Bullock, Claude André Faucher-Giguère, Dušan Kereš, Eliot Quataert, Philip F. Hopkins

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


We describe a public data release of the FIRE-2 cosmological zoom-in simulations of galaxy formation (available at from the Feedback In Realistic Environments (FIRE) project. FIRE-2 simulations achieve parsec-scale resolution to explicitly model the multiphase interstellar medium while implementing direct models for stellar evolution and feedback, including stellar winds, core-collapse and Type Ia supernovae, radiation pressure, photoionization, and photoelectric heating. We release complete snapshots from three suites of simulations. The first comprises 20 simulations that zoom in on 14 Milky Way (MW)-mass galaxies, five SMC/LMC-mass galaxies, and four lower-mass galaxies including one ultrafaint; we release 39 snapshots across z = 0-10. The second comprises four massive galaxies, with 19 snapshots across z = 1-10. Finally, a high-redshift suite comprises 22 simulations, with 11 snapshots across z = 5-10. Each simulation also includes dozens of resolved lower-mass (satellite) galaxies in its zoom-in region. Snapshots include all stored properties for all dark matter, gas, and star particles, including 11 elemental abundances for stars and gas, and formation times (ages) of star particles. We also release accompanying (sub)halo catalogs, which include galaxy properties and member star particles. For the simulations to z = 0, including all MW-mass galaxies, we release the formation coordinates and an “ex situ” flag for all star particles, pointers to track particles across snapshots, catalogs of stellar streams, and multipole basis expansions for the halo mass distributions. We describe publicly available python packages for reading and analyzing these simulations.

Original languageEnglish (US)
Article number44
JournalAstrophysical Journal, Supplement Series
Issue number2
StatePublished - Apr 1 2023

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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