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The DECADE cosmic shear project IV: cosmological constraints from 107 million galaxies across 5,400 deg$^2$ of the sky

Fuente: arXiv

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Autori principali:	Anbajagane, D., Chang, C., Drlica-Wagner, A., Tan, C. Y., Adamow, M., Gruendl, R. A., Secco, L. F., Zhang, Z., Becker, M. R., Ferguson, P. S., Chicoine, N., Herron, K., Alarcon, A., Teixeira, R., Suson, D., Alsina, A. N., Amon, A., Andrade-Oliveira, F., Blazek, J., Bom, C. R., Camacho, H., Carballo-Bello, J. A., Rosell, A. Carnero, Cawthon, R., Cerny, W., Choi, A., Choi, Y., Dodelson, S., Doux, C., Eckert, K., Elvin-Poole, J., Esteves, J., Gatti, M., Giannini, G., Gruen, D., Hartley, W. G., Herner, K., Huff, E. M., James, D. J., Jarvis, M., Krause, E., Kuropatkin, N., Martínez-Vázquez, C. E., Massana, P., Mau, S., McCullough, J., Medina, G. E., Mutlu-Pakdil, B., Myles, J., Navabi, M., Noël, N. E. D., Pace, A. B., Porredon, A., Prat, J., Raveri, M., Riley, A. H., Rykoff, E. S., Sakowska, J. D., Samuroff, S., Sanchez-Cid, D., Sand, D. J., Santana-Silva, L., Sevilla-Noarbe, I., Shin, T., Soares-Santos, M., Stringfellow, G. S., To, C., Tong, A., Troxel, M. A., Vivas, A. K., Yamamoto, M., Yanny, B., Yin, B., Zhang, Y., Zuntz, J.
Natura:	Preprint
Pubblicazione:	2025
Soggetti:	Cosmology and Nongalactic Astrophysics
Accesso online:	Acceder al recurso
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_version_	1866914109185851392
author	Anbajagane, D. Chang, C. Drlica-Wagner, A. Tan, C. Y. Adamow, M. Gruendl, R. A. Secco, L. F. Zhang, Z. Becker, M. R. Ferguson, P. S. Chicoine, N. Herron, K. Alarcon, A. Teixeira, R. Suson, D. Alsina, A. N. Amon, A. Andrade-Oliveira, F. Blazek, J. Bom, C. R. Camacho, H. Carballo-Bello, J. A. Rosell, A. Carnero Cawthon, R. Cerny, W. Choi, A. Choi, Y. Dodelson, S. Doux, C. Eckert, K. Elvin-Poole, J. Esteves, J. Gatti, M. Giannini, G. Gruen, D. Hartley, W. G. Herner, K. Huff, E. M. James, D. J. Jarvis, M. Krause, E. Kuropatkin, N. Martínez-Vázquez, C. E. Massana, P. Mau, S. McCullough, J. Medina, G. E. Mutlu-Pakdil, B. Myles, J. Navabi, M. Noël, N. E. D. Pace, A. B. Porredon, A. Prat, J. Raveri, M. Riley, A. H. Rykoff, E. S. Sakowska, J. D. Samuroff, S. Sanchez-Cid, D. Sand, D. J. Santana-Silva, L. Sevilla-Noarbe, I. Shin, T. Soares-Santos, M. Stringfellow, G. S. To, C. Tong, A. Troxel, M. A. Vivas, A. K. Yamamoto, M. Yanny, B. Yin, B. Zhang, Y. Zuntz, J.
author_facet	Anbajagane, D. Chang, C. Drlica-Wagner, A. Tan, C. Y. Adamow, M. Gruendl, R. A. Secco, L. F. Zhang, Z. Becker, M. R. Ferguson, P. S. Chicoine, N. Herron, K. Alarcon, A. Teixeira, R. Suson, D. Alsina, A. N. Amon, A. Andrade-Oliveira, F. Blazek, J. Bom, C. R. Camacho, H. Carballo-Bello, J. A. Rosell, A. Carnero Cawthon, R. Cerny, W. Choi, A. Choi, Y. Dodelson, S. Doux, C. Eckert, K. Elvin-Poole, J. Esteves, J. Gatti, M. Giannini, G. Gruen, D. Hartley, W. G. Herner, K. Huff, E. M. James, D. J. Jarvis, M. Krause, E. Kuropatkin, N. Martínez-Vázquez, C. E. Massana, P. Mau, S. McCullough, J. Medina, G. E. Mutlu-Pakdil, B. Myles, J. Navabi, M. Noël, N. E. D. Pace, A. B. Porredon, A. Prat, J. Raveri, M. Riley, A. H. Rykoff, E. S. Sakowska, J. D. Samuroff, S. Sanchez-Cid, D. Sand, D. J. Santana-Silva, L. Sevilla-Noarbe, I. Shin, T. Soares-Santos, M. Stringfellow, G. S. To, C. Tong, A. Troxel, M. A. Vivas, A. K. Yamamoto, M. Yanny, B. Yin, B. Zhang, Y. Zuntz, J.
contents	We present cosmological constraints from the Dark Energy Camera All Data Everywhere (DECADE) cosmic shear analysis. This work uses shape measurements for 107 million galaxies measured through Dark Energy Camera (DECam) imaging of $5,\!412$ deg$^2$ of sky that is outside the Dark Energy Survey (DES) footprint. We derive constraints on the cosmological parameters $S_8 = 0.791^{+0.027}_{-0.032}$ and $Ω_{\rm m} =0.269^{+0.034}_{-0.050}$ for the $Λ$CDM model, which are consistent with those from other weak lensing surveys and from the cosmic microwave background. We combine our results with cosmic shear results from DES Y3 at the likelihood level, since the two datasets span independent areas on the sky. The combined measurements, which cover $\approx\! 10,\!000$ deg$^2$, prefer $S_8 = 0.791 \pm 0.023$ and $Ω_{\rm m} = 0.277^{+0.034}_{-0.046}$ under the $Λ$CDM model. These results are the culmination of a series of rigorous studies that characterize and validate the DECADE dataset and the associated analysis methodologies (Anbajagane et. al 2025a,b,c). Overall, the DECADE project demonstrates that the cosmic shear analysis methods employed in Stage-III weak lensing surveys can provide robust cosmological constraints for fairly inhomogeneous datasets. This opens the possibility of using data that have been previously categorized as ``unusable'' for cosmic shear analyses, thereby increasing the statistical power of upcoming weak lensing surveys.
format	Preprint
id	arxiv_https___arxiv_org_abs_2502_17677
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	The DECADE cosmic shear project IV: cosmological constraints from 107 million galaxies across 5,400 deg$^2$ of the sky Anbajagane, D. Chang, C. Drlica-Wagner, A. Tan, C. Y. Adamow, M. Gruendl, R. A. Secco, L. F. Zhang, Z. Becker, M. R. Ferguson, P. S. Chicoine, N. Herron, K. Alarcon, A. Teixeira, R. Suson, D. Alsina, A. N. Amon, A. Andrade-Oliveira, F. Blazek, J. Bom, C. R. Camacho, H. Carballo-Bello, J. A. Rosell, A. Carnero Cawthon, R. Cerny, W. Choi, A. Choi, Y. Dodelson, S. Doux, C. Eckert, K. Elvin-Poole, J. Esteves, J. Gatti, M. Giannini, G. Gruen, D. Hartley, W. G. Herner, K. Huff, E. M. James, D. J. Jarvis, M. Krause, E. Kuropatkin, N. Martínez-Vázquez, C. E. Massana, P. Mau, S. McCullough, J. Medina, G. E. Mutlu-Pakdil, B. Myles, J. Navabi, M. Noël, N. E. D. Pace, A. B. Porredon, A. Prat, J. Raveri, M. Riley, A. H. Rykoff, E. S. Sakowska, J. D. Samuroff, S. Sanchez-Cid, D. Sand, D. J. Santana-Silva, L. Sevilla-Noarbe, I. Shin, T. Soares-Santos, M. Stringfellow, G. S. To, C. Tong, A. Troxel, M. A. Vivas, A. K. Yamamoto, M. Yanny, B. Yin, B. Zhang, Y. Zuntz, J. Cosmology and Nongalactic Astrophysics We present cosmological constraints from the Dark Energy Camera All Data Everywhere (DECADE) cosmic shear analysis. This work uses shape measurements for 107 million galaxies measured through Dark Energy Camera (DECam) imaging of $5,\!412$ deg$^2$ of sky that is outside the Dark Energy Survey (DES) footprint. We derive constraints on the cosmological parameters $S_8 = 0.791^{+0.027}_{-0.032}$ and $Ω_{\rm m} =0.269^{+0.034}_{-0.050}$ for the $Λ$CDM model, which are consistent with those from other weak lensing surveys and from the cosmic microwave background. We combine our results with cosmic shear results from DES Y3 at the likelihood level, since the two datasets span independent areas on the sky. The combined measurements, which cover $\approx\! 10,\!000$ deg$^2$, prefer $S_8 = 0.791 \pm 0.023$ and $Ω_{\rm m} = 0.277^{+0.034}_{-0.046}$ under the $Λ$CDM model. These results are the culmination of a series of rigorous studies that characterize and validate the DECADE dataset and the associated analysis methodologies (Anbajagane et. al 2025a,b,c). Overall, the DECADE project demonstrates that the cosmic shear analysis methods employed in Stage-III weak lensing surveys can provide robust cosmological constraints for fairly inhomogeneous datasets. This opens the possibility of using data that have been previously categorized as ``unusable'' for cosmic shear analyses, thereby increasing the statistical power of upcoming weak lensing surveys.
title	The DECADE cosmic shear project IV: cosmological constraints from 107 million galaxies across 5,400 deg$^2$ of the sky
topic	Cosmology and Nongalactic Astrophysics
url	https://arxiv.org/abs/2502.17677