The DECADE cosmic shear project I: A new weak lensing shape catalog of 107 million galaxies

Year: 2025

Type: article

Abstract: We present the Dark Energy Camera All Data Everywhere (DECADE) weak lensing dataset: a catalog of 107 million galaxies observed by the Dark Energy Camera (DECam) in the northern Galactic cap. This catalog was assembled from public DECam data including survey and standard observing programs. These data were consistently processed with the Dark Energy Survey Data Management pipeline as part of the DECADE campaign and serve as the basis of the DECam Local Volume Exploration survey (DELVE) Early Data Release 3 (EDR3). We apply the Metacalibration measurement algorithm to generate and calibrate galaxy shapes. After cuts, the resulting cosmology-ready galaxy shape catalog covers a region of with an effective number density of . The coadd images used to derive this data have a median limiting magnitude of r = 23.6 , i = 23.2 , and z = 22.6 , estimated at in a 2 arcsecond aperture. We present a suite of detailed studies to characterize the catalog, measure any residual systematic biases, and verify that the catalog is suitable for cosmology analyses. In parallel, we build an image simulation pipeline to characterize the remaining multiplicative shear bias in this catalog, which we measure to be m = ( − 2.454 ± 0.124 ) × 10 − 2 for the full sample. Despite the significantly inhomogeneous nature of the data set, due to it being an amalgamation of various observing programs, we find the resulting catalog has sufficient quality to yield competitive cosmological constraints.

Source: The Open Journal of Astrophysics

DOI: 10.33232/001c.146158

Institutions: University of Chicago, Stanford University, University of Illinois Urbana-Champaign, University of Illinois System, Argonne National Laboratory, University of Washington, Fermi National Accelerator Laboratory, Dartmouth College, University of Pennsylvania, Duke University, University of Zurich, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, University of Pittsburgh, Institut d'Estudis Espacials de Catalunya, Purdue University Northwest, Universidade Estadual de Campinas (UNICAMP), Princeton University, University of Tarapacá, Yale University, Goddard Space Flight Center, Laboratoire de Physique Subatomique et de Cosmologie, Technical University of Munich, Ludwig-Maximilians-Universität München, Kavli Institute for Particle Astrophysics and Cosmology, University of Toronto, University of Surrey, University of Virginia, University of Utah, Istituto Nazionale di Fisica Nucleare, Sezione di Genova, University of Genoa, Durham University, University of Arizona, Carnegie Mellon University, Cerro Tololo Inter-American Observatory

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, University of Pennsylvania, Ohio State University, University of Chicago, University of Portsmouth, Centres de Recerca de Catalunya, University College London, European Commission, University of Sussex, Deutsche Forschungsgemeinschaft, Generalitat de Catalunya, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Financiadora de Estudos e Projetos, Ministerio de Ciencia e Innovación, Institut de Física d'Altes Energies, University of Illinois at Urbana-Champaign, Science and Technology Facilities Council, European Regional Development Fund, Laboratory Directed Research and Development, Integrated Electronics Engineering Center, Binghamton University, Argonne National Laboratory, Fermilab, Lawrence Berkeley National Laboratory, FP7 Ideas: European Research Council, SLAC National Accelerator Laboratory

Awards: G1054097061, G1249197737, G1255325603, Capitalizing on Gravitational Shear, G1328166135, G1491530973, Collaborative Research: Cosmic Shear on Extremely Large Scales with the Dark Energy Camera, Testing the Dark Energy Paradigm and Measuring Neutrino Mass with the Dark Energy Survey, G1679284459, G1682672702, Collaborative Research: Jump Starting LSST Proper Motion Science with 12 Years of DECam Observations, Collaborative Research: Cosmic Shear on Extremely Large Scales with the Dark Energy Camera, G1993551506, G2037078528, G2290189609, G2636502879, G265847165, G2916908045, G3154116105, G3207356259, G3261693824, G3467815775, G3522231704, G3586607516, G3715052068, G3740091667, G3803561910, The Dark Energy Survey Data Management Operations, G3870743921, G393177772, G3968781304, G4104599821, G419118642, G4334057779, G4478587286, G454676879, Understanding the Origin of Cosmic Structure, G4760961572, TOWARDS ROBUST COSMOLOGY FROM LARGE-SCALE STRUCTURE WITH GALAXY SURVEYS, G490073602, G4944594896, G4960654128, G496129201, G5601225551, G5617605617, G5702163051, G5955501538, Collaborative Research: Jump Starting LSST Proper Motion Science with 12 Years of DECam Observations, G6480793128, G6514847661, G6619390584, G6636566961, G6676276723, G6731467812, G7038324121, Graduate Research Fellowship Program (GRFP), G7711421660, G7731791180, G7788408655, G7835623888, G7915813472, G7954596376, Collaborative Research: Jump Starting LSST Proper Motion Science with 12 Years of DECam Observations, Collaborative Research: The Dark Energy Survey Data Management Operations, Studying the Threshold of Galaxy Formation with Ultra-Faint Galaxies

OpenAlex ID: W4415030299