The CAMELS Project: Public Data Release

Villaescusa-Navarro, Francisco, Genel, Shy, Anglés-Alcázar, Daniel, Perez, Lucia A., Villanueva-Domingo, Pablo, Wadekar, Digvijay, Shao, Helen, Mohammad, Faizan G., Hassan, Sultan, Moser, Emily, Lau, Erwin T., Machado Poletti Valle, Luis Fernando, Nicola, Andrina, Thiele, Leander, Jo, Yongseok, Philcox, Oliver H.E., Oppenheimer, Benjamin D., Tillman, Megan, Hahn, Chang Hoon, Kaushal, Neerav, Pisani, Alice, Gebhardt, Matthew, Delgado, Ana Maria, Caliendo, Joyce, Kreisch, Christina, Wong, Kaze W.K., Coulton, William R., Eickenberg, Michael, Parimbelli, Gabriele, Ni, Yueying, Steinwandel, Ulrich P., La Torre, Valentina, Dave, Romeel, Battaglia, Nicholas, Nagai, Daisuke, Spergel, David N., Hernquist, Lars, Burkhart, Blakesley, Narayanan, Desika, Wandelt, Benjamin, Somerville, Rachel S., Bryan, Greg L., Viel, Matteo, Li, Yin, Irsic, Vid, Kraljic, Katarina, Marinacci, Federico and Vogelsberger, Mark (2023) The CAMELS Project: Public Data Release. Astrophysical Journal, Supplement Series, 265 (2): 54. ISSN 0067-0049
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The Cosmology and Astrophysics with Machine Learning Simulations (CAMELS) project was developed to combine cosmology with astrophysics through thousands of cosmological hydrodynamic simulations and machine learning. CAMELS contains 4233 cosmological simulations, 2049 N-body simulations, and 2184 state-of-the-art hydrodynamic simulations that sample a vast volume in parameter space. In this paper, we present the CAMELS public data release, describing the characteristics of the CAMELS simulations and a variety of data products generated from them, including halo, subhalo, galaxy, and void catalogs, power spectra, bispectra, Lyα spectra, probability distribution functions, halo radial profiles, and X-rays photon lists. We also release over 1000 catalogs that contain billions of galaxies from CAMELS-SAM: a large collection of N-body simulations that have been combined with the Santa Cruz semianalytic model. We release all the data, comprising more than 350 terabytes and containing 143,922 snapshots, millions of halos, galaxies, and summary statistics. We provide further technical details on how to access, download, read, and process the data at https://camels.readthedocs.io.
Item Type Article
Identification Number 10.3847/1538-4365/acbf47
Additional information © 2023. The Author(s). Published by the American Astronomical Society. The original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. https://creativecommons.org/licenses/by/4.0/
Keywords astrostatistics, cosmology, galaxy formation, hydrodynamical simulations, astronomy and astrophysics, space and planetary science
Date Deposited 29 Jul 2026 11:07
Last Modified 01 Aug 2026 01:08

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