The Dark Energy Survey Year 3 high-redshift sample: Selection, characterization, and analysis of galaxy clustering

Sanchez, C.; Alarcon, A.; Bernstein, G. M.; Sanchez, J.; Pandey, S.; Raveri, M.; Prat, J.; Weaverdyck, N.; Sevilla-Noarbe, I.; Chang, C.; Baxter, E.; Omori, Y.; Jain, B.; Alves, O.; Amon, A.; Bechtol, K.; Becker, M. R.; Blazek, J.; Choi, A.; Campos, A.; Rosell, A. C.; Kind, M. C.; Crocce, M.; Cross, D.; Derose, J.; Diehl, H. T.; Dodelson, S.; Drlica-Wagner, A.; Eckert, K.; Eifler, T. F.; Elvin-Poole, J.; Everett, S.; Fang, X.; Fosalba, P.; Gruen, D.; Gruendl, R. A.; Harrison, I.; Hartley, W. G.; Huang, H.; Huff, E. M.; Kuropatkin, N.; Maccrann, N.; Mccullough, J.; Myles, J.; Krause, E.; Porredon, A.; Rodriguez-Monroy, M.; Rykoff, E. S.; Secco, L. F.; Sheldon, E.; Troxel, M. A.; Yanny, B.; Yin, B.; Zhang, Y.; Zuntz, J.; Abbott, T. M. C.; Aguena, M.; Allam, S.; Andrade-Oliveira, F.; Bertin, E.; Bocquet, S.; Brooks, D.; Burke, D. L.; Carretero, J.; Castander, F. J.; Cawthon, R.; Conselice, C.; Costanzi, M.; Pereira, M. E. S.; Desai, S.; Doel, P.; Doux, C.; Ferrero, I.; Flaugher, B.; Frieman, J.; Garcia-Bellido, J.; Gutierrez, G.; Herner, K.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; James, D. J.; Kuehn, K.; Marshall, J. L.; Mena-Fernandez, J.; Menanteau, F.; Miquel, R.; Ogando, R. L. C.; Palmese, A.; Paz-Chinchon, F.; Pieres, A.; Malagon, A. A. P.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Smith, M.; Suchyta, E.; Tarle, G.; Thomas, D.; To, C.

doi:10.1093/mnras/stad2402

The fiducial cosmological analyses of imaging surveys like DES typically probe the Universe at redshifts z < 1. We present the selection and characterization of high-redshift galaxy samples using DES Year 3 data, and the analysis of their galaxy clustering measurements. In particular, we use galaxies that are fainter than those used in the previous DES Year 3 analyses and a Bayesian redshift scheme to define three tomographic bins with mean redshifts around z ∼0.9, 1.2, and 1.5, which extend the redshift coverage of the fiducial DES Year 3 analysis. These samples contain a total of about 9 million galaxies, and their galaxy density is more than 2 times higher than those in the DES Year 3 fiducial case. We characterize the redshift uncertainties of the samples, including the usage of various spectroscopic and high-quality redshift samples, and we develop a machine-learning method to correct for correlations between galaxy density and survey observing conditions. The analysis of galaxy clustering measurements, with a total signal to noise S/N ∼70 after scale cuts, yields robust cosmological constraints on a combination of the fraction of matter in the Universe

The Dark Energy Survey Year 3 high-redshift sample: Selection, characterization, and analysis of galaxy clustering / Sanchez, C.; Alarcon, A.; Bernstein, G. M.; Sanchez, J.; Pandey, S.; Raveri, M.; Prat, J.; Weaverdyck, N.; Sevilla-Noarbe, I.; Chang, C.; Baxter, E.; Omori, Y.; Jain, B.; Alves, O.; Amon, A.; Bechtol, K.; Becker, M. R.; Blazek, J.; Choi, A.; Campos, A.; Rosell, A. C.; Kind, M. C.; Crocce, M.; Cross, D.; Derose, J.; Diehl, H. T.; Dodelson, S.; Drlica-Wagner, A.; Eckert, K.; Eifler, T. F.; Elvin-Poole, J.; Everett, S.; Fang, X.; Fosalba, P.; Gruen, D.; Gruendl, R. A.; Harrison, I.; Hartley, W. G.; Huang, H.; Huff, E. M.; Kuropatkin, N.; Maccrann, N.; Mccullough, J.; Myles, J.; Krause, E.; Porredon, A.; Rodriguez-Monroy, M.; Rykoff, E. S.; Secco, L. F.; Sheldon, E.; Troxel, M. A.; Yanny, B.; Yin, B.; Zhang, Y.; Zuntz, J.; Abbott, T. M. C.; Aguena, M.; Allam, S.; Andrade-Oliveira, F.; Bertin, E.; Bocquet, S.; Brooks, D.; Burke, D. L.; Carretero, J.; Castander, F. J.; Cawthon, R.; Conselice, C.; Costanzi, M.; Pereira, M. E. S.; Desai, S.; Doel, P.; Doux, C.; Ferrero, I.; Flaugher, B.; Frieman, J.; Garcia-Bellido, J.; Gutierrez, G.; Herner, K.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; James, D. J.; Kuehn, K.; Marshall, J. L.; Mena-Fernandez, J.; Menanteau, F.; Miquel, R.; Ogando, R. L. C.; Palmese, A.; Paz-Chinchon, F.; Pieres, A.; Malagon, A. A. P.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Smith, M.; Suchyta, E.; Tarle, G.; Thomas, D.; To, C.. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - 525:3(2023), pp. 3896-3922. [10.1093/mnras/stad2402]