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| COSMOS (astronomical survey) | |
|---|---|
| Name | COSMOS (astronomical survey) |
| Established | 2003 |
| Location | Hubble Space Telescope Subaru Telescope Canada–France–Hawaii Telescope |
COSMOS (astronomical survey) is a deep, multiwavelength astronomical survey covering a two-square-degree field conducted to study galaxy evolution, large-scale structure, and dark matter through coordinated observations. The project combined imaging and spectroscopy from facilities such as the Hubble Space Telescope, Subaru Telescope, Keck Observatory, Very Large Telescope, Spitzer Space Telescope, Chandra X‑ray Observatory, XMM-Newton, GALEX, VLA, and the Canada–France–Hawaii Telescope to generate comprehensive datasets for cosmological and extragalactic research. The survey field overlaps with legacy fields used by projects like Sloan Digital Sky Survey, COSMOS-Web, and follow-up campaigns by institutions including European Southern Observatory, National Aeronautics and Space Administration, National Science Foundation, and National Astronomical Observatory of Japan.
COSMOS aimed to map the distribution of galaxies, dark matter, and large-scale structure using observations from space observatories such as Hubble Space Telescope, Spitzer Space Telescope, Chandra X‑ray Observatory, and XMM-Newton alongside ground facilities like Subaru Telescope, Keck Observatory, and Very Large Telescope. The field selection prioritized overlap with prior surveys including Sloan Digital Sky Survey, Deep Extragalactic Evolutionary Probe, and GOODS to enable cross-correlation studies with teams from California Institute of Technology, University of Cambridge, Princeton University, and Harvard–Smithsonian Center for Astrophysics. The program assembled a consortium including researchers affiliated with Max Planck Society, Space Telescope Science Institute, Laboratoire d'Astrophysique de Marseille, and National Astronomical Observatory of Japan to manage observations, data reduction, and release schedules.
The COSMOS survey design integrated imaging and spectroscopy across ultraviolet, optical, infrared, radio, and X-ray bands using instruments such as Hubble Advanced Camera for Surveys, Subaru Suprime-Cam, VIMOS on Very Large Telescope, DEIMOS and LRIS on Keck Observatory, IRAC on Spitzer Space Telescope, and ACIS on Chandra X‑ray Observatory. Observational strategies were coordinated with teams from European Southern Observatory, National Aeronautics and Space Administration, Japan Aerospace Exploration Agency, and National Radio Astronomy Observatory to achieve uniform depth and area comparable to legacy programs like Hubble Deep Field and Great Observatories Origins Deep Survey. The design emphasized contiguous coverage to trace cosmic web features identified in theoretical work by groups at Institute for Advanced Study, Lawrence Berkeley National Laboratory, and Kavli Institute for Cosmology.
COSMOS produced deep multiwavelength imaging from facilities including Hubble Space Telescope, Subaru Telescope, Spitzer Space Telescope, Chandra X‑ray Observatory, XMM-Newton, GALEX, and the Very Large Array, plus spectroscopy from Keck Observatory, Very Large Telescope, and Magellan Telescopes. Observational campaigns were scheduled in coordination with agencies like National Science Foundation, National Aeronautics and Space Administration, European Space Agency, and Japan Aerospace Exploration Agency to combine datasets similar in ambition to Sloan Digital Sky Survey and Pan-STARRS. The dataset enabled studies of objects catalogued by groups at California Institute of Technology, University of California, Berkeley, Princeton University, and University of Tokyo.
Results from the survey informed models of galaxy assembly, environment-driven evolution, active galactic nuclei demographics, and dark matter mapping using weak gravitational lensing, with high-impact publications involving researchers from Harvard University, Yale University, Columbia University, University of Cambridge, and Max Planck Institute for Astrophysics. COSMOS produced constraints on halo occupation distribution consistent with analyses from Planck (spacecraft), measurements of baryon acoustic oscillations comparable to BOSS (Baryon Oscillation Spectroscopic Survey), and population studies of quasars akin to work by Chandra X‑ray Observatory teams. The survey's weak lensing mass maps complemented cluster studies from South Pole Telescope and Atacama Cosmology Telescope, and its multiwavelength AGN catalogs were cross-referenced by groups at European Southern Observatory, Space Telescope Science Institute, and National Radio Astronomy Observatory.
Data reduction and catalog production were conducted by collaborations involving Space Telescope Science Institute, National Radio Astronomy Observatory, Subaru Telescope teams, and software groups at Max Planck Society and Lawrence Livermore National Laboratory, producing photometric redshift catalogs, spectroscopic compilations, weak lensing shear catalogs, and multiwavelength cross-matched tables. Pipelines incorporated algorithms from collaborations with California Institute of Technology, University of Oxford, University of Tokyo, and Institut d'Astrophysique de Paris for tasks similar to those used in CFHTLenS and DEEP2; resulting catalogs were distributed to teams at Princeton University, Harvard–Smithsonian Center for Astrophysics, and CEA Saclay for science exploitation. Public releases followed data policies coordinated with European Space Agency and National Aeronautics and Space Administration stakeholders.
The COSMOS collaboration included institutions such as Space Telescope Science Institute, National Radio Astronomy Observatory, Subaru Telescope, Keck Observatory, European Southern Observatory, Max Planck Society, and universities including University of California, Berkeley, Princeton University, Harvard University, and University of Tokyo. Its legacy influenced subsequent programs like COSMOS-Web, Euclid (spacecraft), Nancy Grace Roman Space Telescope, LSST (Vera C. Rubin Observatory), and informed survey strategies at Subaru Strategic Program and SKA (Square Kilometre Array). The survey provided benchmark datasets cited in reports by National Academies of Sciences, Engineering, and Medicine and informed proposals to agencies such as National Science Foundation and European Research Council.
Future work building on COSMOS includes deep follow-up with James Webb Space Telescope, spectroscopy with Thirty Meter Telescope, Extremely Large Telescope, and expanded radio mapping with Square Kilometre Array, coordinated with teams at European Southern Observatory, National Aeronautics and Space Administration, Japan Aerospace Exploration Agency, and National Science Foundation. Planned analyses will integrate machine-learning pipelines developed at Google Research, IBM Research, and academic centers like Stanford University and Massachusetts Institute of Technology to refine photometric redshifts, lensing shear estimation, and multiwavelength source classification for synergy with surveys such as Euclid (spacecraft) and LSST (Vera C. Rubin Observatory).
Category:Extragalactic astronomy