COSMOS2025: The COSMOS-Web galaxy catalog of photometry, morphology, redshifts, and physical parameters from JWST, HST, and ground-based imaging

We present COSMOS2025, the COSMOS-Web catalog of photometry, morphology, photometric redshifts, and physical parameters for more than 700 000 galaxies in the Cosmic Evolution Survey (COSMOS) field. This catalog is based on our James Webb Space Telescope 255 h COSMOS-Web program, which provides deep near-infrared imaging in four NIRCam (F115W, F150W, F277W, F444W) and one MIRI (F770W) filter over the central ~0.54 deg 2 (~0.2 deg 2 for MIRI) in COSMOS. These data are combined with ground- and space-based data to derive photometric measurements of NIRCam-detected sources using both fixed-aperture photometry (on the space-based bands) and a profile-fitting technique on all 37 bands spanning 0.3 μm to 8 μm. We provide morphology for all sources from complementary techniques including profile fitting and machine-learning classification. We derive photometric redshifts, physical parameters, and non-parametric star formation histories from spectral energy distribution (SED) fitting. The catalog has been extensively validated against previous COSMOS catalogs and other surveys. Photometric redshift accuracy measured using spectroscopically confirmed galaxies out to z ~ 9 reaches σ MAD = 0.012 at m F444W < 28 and remains at σ MAD ≲ 0.03 as a function of magnitude, color, and galaxy type. This represents a factor of ~2 improvement at 26 AB mag compared to COSMOS2020. The catalog is approximately 80% complete at log( M ⋆ /M ⊙ ) ~ 9 at z ~ 10 and at log( M ⋆ /M ⊙ ) ~ 7 at z ~ 0.2, representing a gain of 1 dex compared to COSMOS2020. COSMOS2025 represents the definitive COSMOS-Web catalog. It is provided with complete documentation, together with redshift probability distributions, and it is ready for scientific exploitation today.

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Publication Details

Journal
Astronomy and Astrophysics
Published
2025-11-21
DOI
https://doi.org/10.1051/0004-6361/202555799
Citations
12
Primary Topic
Galaxies: Formation, Evolution, Phenomena
Type
article
Field-Weighted Citation Impact
13.86
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article

COSMOS2025: The COSMOS-Web galaxy catalog of photometry, morphology, redshifts, and physical parameters from JWST, HST, and ground-based imaging

Louise Paquereau, Eiichi Egami, Ali Ahmad Khostovan, Francesco Valentino et al.
12 citations
Astronomy and Astrophysics
Galaxies: Formation, Evolution, Phenomena
13.86
article

COSMOS2025: The COSMOS-Web galaxy catalog of photometry, morphology, redshifts, and physical parameters from JWST, HST, and ground-based imaging

Louise Paquereau, Eiichi Egami, Ali Ahmad Khostovan, Francesco Valentino, Lilan Yang, Santosh Harish, Marko Shuntov, Malte Brinch, G. Gozaliasl, Shuowen Jin, Sina Taamoli, A. Renzini, Xiaohui Fan, Jaclyn B. Champagne, H. J. McCracken, Feige Wang, R. Michael Rich, Benny Trakhtenbrot, Zahra Sattari, M. Kümmel, O. Ilbert, Iris Jermann, N. Z. Scoville, Jianwei Lyu, G. Magdis, Diana Scognamiglio, Koki Kakiichi, Fabrizio Gentile, T. Moutard, Maximilien Franco, Erini Lambrides, C. Laigle, R. Gavazzi, Ronaldo Laishram, Nima Chartab, Sune Toft, Ryan Endsley, Daizhong Liu, E. Bertin, Hossein Hatamnia, Marc Schefer, M.E. Casey, M. Anton Koekemoer, Carter Flayhart, S. Jeyhan Kartaltepe, B. Hollis Akins, C. Rafael Arango-Toro, M. Edward Berman
article en
12 citations

Abstract

We present COSMOS2025, the COSMOS-Web catalog of photometry, morphology, photometric redshifts, and physical parameters for more than 700 000 galaxies in the Cosmic Evolution Survey (COSMOS) field. This catalog is based on our James Webb Space Telescope 255 h COSMOS-Web program, which provides deep near-infrared imaging in four NIRCam (F115W, F150W, F277W, F444W) and one MIRI (F770W) filter over the central ~0.54 deg 2 (~0.2 deg 2 for MIRI) in COSMOS. These data are combined with ground- and space-based data to derive photometric measurements of NIRCam-detected sources using both fixed-aperture photometry (on the space-based bands) and a profile-fitting technique on all 37 bands spanning 0.3 μm to 8 μm. We provide morphology for all sources from complementary techniques including profile fitting and machine-learning classification. We derive photometric redshifts, physical parameters, and non-parametric star formation histories from spectral energy distribution (SED) fitting. The catalog has been extensively validated against previous COSMOS catalogs and other surveys. Photometric redshift accuracy measured using spectroscopically confirmed galaxies out to z ~ 9 reaches σ MAD = 0.012 at m F444W < 28 and remains at σ MAD ≲ 0.03 as a function of magnitude, color, and galaxy type. This represents a factor of ~2 improvement at 26 AB mag compared to COSMOS2020. The catalog is approximately 80% complete at log( M ⋆ /M ⊙ ) ~ 9 at z ~ 10 and at log( M ⋆ /M ⊙ ) ~ 7 at z ~ 0.2, representing a gain of 1 dex compared to COSMOS2020. COSMOS2025 represents the definitive COSMOS-Web catalog. It is provided with complete documentation, together with redshift probability distributions, and it is ready for scientific exploitation today.

Astronomy and AstrophysicsVol. 704
University of California, Riverside (US), University of Geneva (CH), University of Hawaiʻi at Mānoa (US), California Institute of Technology (US), University of Copenhagen (DK), Northeastern University (US), Centre National de la Recherche Scientifique (FR), Space Telescope Science Institute (US), Goddard Space Flight Center (US), Jet Propulsion Laboratory (US), University of Arizona (US), University of Kentucky (US), University of California, Santa Barbara (US), Rochester Institute of Technology (US), Tel Aviv University (IL), University of California, Santa Cruz (US), Université Paris Cité (FR), Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Université Paris-Saclay (FR), University of Michigan (US), Institut d'Astrophysique de Paris (FR), European Space Agency (FR), Purple Mountain Observatory (CN), University of Hawaii at Hilo (US), Sorbonne Université (FR), Osservatorio astronomico di Bologna (IT), Astrophysique, Instrumentation et Modélisation (FR), Max Planck Institute for Extraterrestrial Physics (DE), European Space Astronomy Centre (ES), Laboratoire d’Astrophysique de Marseille (FR), Excellence Cluster Origins (DE), DAWN Center for Independent Living (US), Kavli Institute for the Physics and Mathematics of the Universe (JP), CEA Paris-Saclay (FR), Astronomy and Space (AU), Osservatorio Astronomico di Padova (IT), National Astronomical Observatory of Japan (JP), University of Tirana (AL), The University of Tokyo (JP), Ludwig-Maximilians-Universität München (DE), The University of Texas at Austin (US), National Institute for Astrophysics (IT), Technical University of Denmark (DK), Aalto University (FI)
Openalex Percentile: Top 1%
Galaxies: Formation, Evolution, Phenomena
13.86
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