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Dark Energy Survey Year 6 Results: Galaxy-galaxy lensing

Fuente: arXiv

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Main Authors:	Giannini, G., Camacho-Ciurana, G., Whyley, A., Prat, J., Blazek, J., Sánchez, C., Zacharegkas, G., Alarcon, A., Legnani, E., Amon, A., Anbajagane, D., Avila, S., Bechtol, K., Becker, M. R., Bernstein, G. M., Bocquet, S., Campos, A., Rosell, A. Carnero, Cawthon, R., Chang, C., Crocce, M., d'Assignies, W., De Vicente, J., Drlica-Wagner, A., Elvin-Poole, S., Ferté, A., Gatti, M., Gruen, D., Jarvis, M., Manera, M., Mau, S., McCullough, J., Menanteau, F., Myles, J., Porredon, A., Rodriguez-Monroy, M., Roodman, A., Rykoff, E. S., Samuroff, S., Cid, D. Sanchez, Sevilla-Noarbe, I., Schutt, T., Troxel, M. A., Weaverdyck, N., Yamamoto, M., Yin, B., Abbott, T. M. C., Aguena, M., Allam, S., Alves, O., Andrade-Oliveira, F., Bacon, D., Bertin, E., Brooks, D., Camacho, H., Carretero, J., da Costa, L. N., Pereira, M. E. da Silva, Davis, T. M., DePoy, D. L., Desai, S., Diehl, H. T., Doel, P., Doux, C., Eifler, T. F., Everett, S., Evrard, A. E., Fosalba, P., Frieman, J., García-Bellido, J., Gaztanaga, E., Giles, P., Glazebrook, K., Harrison, I., Hartley, W. G., Herner, K., Hinton, S. R., Hollowood, D. L., Honscheid, K., Huterer, D., Jain, B., James, D. J., Jeffrey, N., Kacprzak, T., Kent, S., Krause, E., Lahav, O., Lee, S., Marshall, J. L., Mena-Fernández, J., Miquel, R., Mohr, J. J., Muir, J., Nichol, R. C., Ogando, R. L. C., Palmese, A., Paterno, M., Percival, W. J., Petravick, D., Malagón, A. A. Plazas, Raveri, M., Rosenfeld, R., Sanchez, E., Sheldon, E., Shin, T., Smith, J. Allyn., Smith, M., Soares-Santos, M., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., To, C., Tucker, D. L., Vikram, V., Vincenzi, M., Walker, A. R., Wiseman, P., Yanny, B.
Format:	Preprint
Published:	2026
Subjects:	Cosmology and Nongalactic Astrophysics
Online Access:	Acceder al recurso
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author	Giannini, G. Camacho-Ciurana, G. Whyley, A. Prat, J. Blazek, J. Sánchez, C. Zacharegkas, G. Alarcon, A. Legnani, E. Amon, A. Anbajagane, D. Avila, S. Bechtol, K. Becker, M. R. Bernstein, G. M. Bocquet, S. Campos, A. Rosell, A. Carnero Cawthon, R. Chang, C. Crocce, M. d'Assignies, W. De Vicente, J. Drlica-Wagner, A. Elvin-Poole, S. Ferté, A. Gatti, M. Gruen, D. Jarvis, M. Manera, M. Mau, S. McCullough, J. Menanteau, F. Myles, J. Porredon, A. Rodriguez-Monroy, M. Roodman, A. Rykoff, E. S. Samuroff, S. Cid, D. Sanchez Sevilla-Noarbe, I. Schutt, T. Troxel, M. A. Weaverdyck, N. Yamamoto, M. Yin, B. Abbott, T. M. C. Aguena, M. Allam, S. Alves, O. Andrade-Oliveira, F. Bacon, D. Bertin, E. Brooks, D. Camacho, H. Carretero, J. da Costa, L. N. Pereira, M. E. da Silva Davis, T. M. DePoy, D. L. Desai, S. Diehl, H. T. Doel, P. Doux, C. Eifler, T. F. Everett, S. Evrard, A. E. Fosalba, P. Frieman, J. García-Bellido, J. Gaztanaga, E. Giles, P. Glazebrook, K. Harrison, I. Hartley, W. G. Herner, K. Hinton, S. R. Hollowood, D. L. Honscheid, K. Huterer, D. Jain, B. James, D. J. Jeffrey, N. Kacprzak, T. Kent, S. Krause, E. Lahav, O. Lee, S. Marshall, J. L. Mena-Fernández, J. Miquel, R. Mohr, J. J. Muir, J. Nichol, R. C. Ogando, R. L. C. Palmese, A. Paterno, M. Percival, W. J. Petravick, D. Malagón, A. A. Plazas Raveri, M. Rosenfeld, R. Sanchez, E. Sheldon, E. Shin, T. Smith, J. Allyn. Smith, M. Soares-Santos, M. Suchyta, E. Swanson, M. E. C. Tarle, G. Thomas, D. To, C. Tucker, D. L. Vikram, V. Vincenzi, M. Walker, A. R. Wiseman, P. Yanny, B.
author_facet	Giannini, G. Camacho-Ciurana, G. Whyley, A. Prat, J. Blazek, J. Sánchez, C. Zacharegkas, G. Alarcon, A. Legnani, E. Amon, A. Anbajagane, D. Avila, S. Bechtol, K. Becker, M. R. Bernstein, G. M. Bocquet, S. Campos, A. Rosell, A. Carnero Cawthon, R. Chang, C. Crocce, M. d'Assignies, W. De Vicente, J. Drlica-Wagner, A. Elvin-Poole, S. Ferté, A. Gatti, M. Gruen, D. Jarvis, M. Manera, M. Mau, S. McCullough, J. Menanteau, F. Myles, J. Porredon, A. Rodriguez-Monroy, M. Roodman, A. Rykoff, E. S. Samuroff, S. Cid, D. Sanchez Sevilla-Noarbe, I. Schutt, T. Troxel, M. A. Weaverdyck, N. Yamamoto, M. Yin, B. Abbott, T. M. C. Aguena, M. Allam, S. Alves, O. Andrade-Oliveira, F. Bacon, D. Bertin, E. Brooks, D. Camacho, H. Carretero, J. da Costa, L. N. Pereira, M. E. da Silva Davis, T. M. DePoy, D. L. Desai, S. Diehl, H. T. Doel, P. Doux, C. Eifler, T. F. Everett, S. Evrard, A. E. Fosalba, P. Frieman, J. García-Bellido, J. Gaztanaga, E. Giles, P. Glazebrook, K. Harrison, I. Hartley, W. G. Herner, K. Hinton, S. R. Hollowood, D. L. Honscheid, K. Huterer, D. Jain, B. James, D. J. Jeffrey, N. Kacprzak, T. Kent, S. Krause, E. Lahav, O. Lee, S. Marshall, J. L. Mena-Fernández, J. Miquel, R. Mohr, J. J. Muir, J. Nichol, R. C. Ogando, R. L. C. Palmese, A. Paterno, M. Percival, W. J. Petravick, D. Malagón, A. A. Plazas Raveri, M. Rosenfeld, R. Sanchez, E. Sheldon, E. Shin, T. Smith, J. Allyn. Smith, M. Soares-Santos, M. Suchyta, E. Swanson, M. E. C. Tarle, G. Thomas, D. To, C. Tucker, D. L. Vikram, V. Vincenzi, M. Walker, A. R. Wiseman, P. Yanny, B.
contents	We present galaxy--galaxy lensing (GGL) measurements from the full six years of data from the Dark Energy Survey (DES Y6), covering $4031\,\mathrm{deg}^2$ and used in the DES Y6 $3\times2$pt cosmological analysis. We use the MagLim++ lens sample, containing $\sim 9$ million galaxies divided into six redshift bins, and the Metadetection source catalog, including $\sim 140$ million galaxies divided into four redshift bins. The mean tangential shear signal achieves a total signal-to-noise ratio (S/N) of $173$, corresponding to a $17\%$ improvement over DES Y3. After applying the scale cuts used in the cosmological analysis, with $R_{\min}=6\,\mathrm{Mpc}/h$ ($4\,\mathrm{Mpc}/h$) for the linear (nonlinear) galaxy-bias model, the S/N is reduced to $75$ (90). A comprehensive suite of validation tests demonstrates that the measurement is robust against observational and astrophysical systematics at the statistical precision required for the DES Y6 analysis. Although not used in the main cosmological analysis, we extract high--signal-to-noise geometric shear-ratio measurements from the galaxy--galaxy lensing signal on small angular scales. These measurements provide an internal consistency check on the photometric redshift distributions and shear calibration used in the $3\times2$pt analysis.
format	Preprint
id	arxiv_https___arxiv_org_abs_2601_15175
institution	arXiv
publishDate	2026
record_format	arxiv
spellingShingle	Dark Energy Survey Year 6 Results: Galaxy-galaxy lensing Giannini, G. Camacho-Ciurana, G. Whyley, A. Prat, J. Blazek, J. Sánchez, C. Zacharegkas, G. Alarcon, A. Legnani, E. Amon, A. Anbajagane, D. Avila, S. Bechtol, K. Becker, M. R. Bernstein, G. M. Bocquet, S. Campos, A. Rosell, A. Carnero Cawthon, R. Chang, C. Crocce, M. d'Assignies, W. De Vicente, J. Drlica-Wagner, A. Elvin-Poole, S. Ferté, A. Gatti, M. Gruen, D. Jarvis, M. Manera, M. Mau, S. McCullough, J. Menanteau, F. Myles, J. Porredon, A. Rodriguez-Monroy, M. Roodman, A. Rykoff, E. S. Samuroff, S. Cid, D. Sanchez Sevilla-Noarbe, I. Schutt, T. Troxel, M. A. Weaverdyck, N. Yamamoto, M. Yin, B. Abbott, T. M. C. Aguena, M. Allam, S. Alves, O. Andrade-Oliveira, F. Bacon, D. Bertin, E. Brooks, D. Camacho, H. Carretero, J. da Costa, L. N. Pereira, M. E. da Silva Davis, T. M. DePoy, D. L. Desai, S. Diehl, H. T. Doel, P. Doux, C. Eifler, T. F. Everett, S. Evrard, A. E. Fosalba, P. Frieman, J. García-Bellido, J. Gaztanaga, E. Giles, P. Glazebrook, K. Harrison, I. Hartley, W. G. Herner, K. Hinton, S. R. Hollowood, D. L. Honscheid, K. Huterer, D. Jain, B. James, D. J. Jeffrey, N. Kacprzak, T. Kent, S. Krause, E. Lahav, O. Lee, S. Marshall, J. L. Mena-Fernández, J. Miquel, R. Mohr, J. J. Muir, J. Nichol, R. C. Ogando, R. L. C. Palmese, A. Paterno, M. Percival, W. J. Petravick, D. Malagón, A. A. Plazas Raveri, M. Rosenfeld, R. Sanchez, E. Sheldon, E. Shin, T. Smith, J. Allyn. Smith, M. Soares-Santos, M. Suchyta, E. Swanson, M. E. C. Tarle, G. Thomas, D. To, C. Tucker, D. L. Vikram, V. Vincenzi, M. Walker, A. R. Wiseman, P. Yanny, B. Cosmology and Nongalactic Astrophysics We present galaxy--galaxy lensing (GGL) measurements from the full six years of data from the Dark Energy Survey (DES Y6), covering $4031\,\mathrm{deg}^2$ and used in the DES Y6 $3\times2$pt cosmological analysis. We use the MagLim++ lens sample, containing $\sim 9$ million galaxies divided into six redshift bins, and the Metadetection source catalog, including $\sim 140$ million galaxies divided into four redshift bins. The mean tangential shear signal achieves a total signal-to-noise ratio (S/N) of $173$, corresponding to a $17\%$ improvement over DES Y3. After applying the scale cuts used in the cosmological analysis, with $R_{\min}=6\,\mathrm{Mpc}/h$ ($4\,\mathrm{Mpc}/h$) for the linear (nonlinear) galaxy-bias model, the S/N is reduced to $75$ (90). A comprehensive suite of validation tests demonstrates that the measurement is robust against observational and astrophysical systematics at the statistical precision required for the DES Y6 analysis. Although not used in the main cosmological analysis, we extract high--signal-to-noise geometric shear-ratio measurements from the galaxy--galaxy lensing signal on small angular scales. These measurements provide an internal consistency check on the photometric redshift distributions and shear calibration used in the $3\times2$pt analysis.
title	Dark Energy Survey Year 6 Results: Galaxy-galaxy lensing
topic	Cosmology and Nongalactic Astrophysics
url	https://arxiv.org/abs/2601.15175