DECADE+DES Y3 Weak Lensing Mass Map: A 13,000 deg$^2$ View of Cosmic Structure from 270 Million Galaxies
Year: 2025
Type: article
Abstract: We present the largest galaxy weak lensing mass map of the late-time Universe, reconstructed from 270 million galaxies in the DECADE and DES Year 3 datasets, covering 13,000 square degrees. We validate the map through systematic tests against observational conditions (depth, seeing, etc.), finding the map is statistically consistent with no contamination. The large area covered by the mass map makes it a well-suited tool for cosmological analyses, cross-correlation studies and the identification of large-scale structure features. We demonstrate its potential by detecting cosmic filaments directly from the mass map for the first time and validating them through their association with galaxy clusters selected using the Sunyaev-Zeldovich effect from Planck and ACT DR6.
Authors: Gatti, M., Anbajagane, D., Chang, C., Bacon, D. J., Prat, J., Adamow, M., Alarcon, A., Becker, M. R., Carballo-Bello, J. A., Chicoine, N., Doux, C., Drlica-Wagner, A., Ferguson, P. S., Gruen, D., Gruendl, R. A., Herron, K., Jeffrey, N., James, D. J., Kovács, A., Martínez-Vázquez, C. E., Massana, P., Mau, S., McCullough, J., Medina, G. E., Mutlu-Pakdil, B., Noël, N. E. D., Pace, A. B., Pollina, G., Riley, A. H., Sand, D. J., Secco, L. F., Stringfellow, G. S., Suson, D., Tan, C. Y., Teixeira, R., Tollerud, E. J., Troxel, M. A., Whiteway, L., Zenteno, A., Zhang, Z.
Institution: Laboratoire de Physique Subatomique et de Cosmologie
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Ohio State University, University of Chicago, European Commission, Ministerio de Ciencia e Innovación, University of Illinois at Urbana-Champaign, Science and Technology Facilities Council, European Regional Development Fund, Division of Astronomical Sciences, Laboratory Directed Research and Development, Fermilab, FP7 Ideas: European Research Council
Awards: Capitalizing on Gravitational Shear, 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, 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, G2037078528, The Dark Energy Survey Data Management Operations, Understanding the Origin of Cosmic Structure, Collaborative Research: The Dark Energy Survey Data Management Operations, Studying the Threshold of Galaxy Formation with Ultra-Faint Galaxies
OpenAlex ID: W4414566671
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