黑暗能源调查第3年结果：从Sompz和聚类的组合及其对宇宙学的影响的Maglim镜头样本的红移校准

论文标题

黑暗能源调查第3年结果：从Sompz和聚类的组合及其对宇宙学的影响的Maglim镜头样本的红移校准

Dark Energy Survey Year 3 Results: Redshift Calibration of the MagLim Lens Sample from the combination of SOMPZ and clustering and its impact on Cosmology

论文作者

Giannini, G., Alarcon, A., Gatti, M., Porredon, A., Crocce, M., Bernstein, G. M., Cawthon, R., Sánchez, C., Doux, C., Elvin-Poole, J., Raveri, M., Myles, J., Amon, A., Allam, S., Alves, O., Andrade-Oliveira, F., Baxter, E., Bechtol, K., Becker, M. R., Blazek, J., Camacho, H., Campos, A., Rosell, A. Carnero, Kind, M. Carrasco, Choi, A., Cordero, J., De Vicente, J., DeRose, J., Diehl, H. T., Dodelson, S., Drlica-Wagner, A., Eckert, K., Everett, S., Fang, X., Farahi, A., Fosalba, P., Friedrich, O., Gruen, D., Gruendl, R. A., Gschwend, J., Harrison, I., Hartley, W. G., Huff, E. M., Jarvis, M., Krause, E., Kuropatkin, N., Lemos, P., MacCrann, N., McCullough, J., Muir, J., Pandey, S., Prat, J., Rodriguez-Monroy, M., Ross, A. J., Rykoff, E. S., Samuroff, S., Secco, L. F., Sevilla-Noarbe, I., Sheldon, E., Troxel, M. A., Tucker, D. L., Weaverdyck, N., Yanny, B., Yin, B., Zhang, Y., Abbott, T. M. C., Aguena, M., Bacon, D., Bertin, E., Bocquet, S., Brooks, D., Burke, D. L., Carretero, J., Castander, F. J., Costanzi, M., da Costa, L. N., Pereira, M. E. S., Desai, S., Doel, P., Ferrero, I., Flaugher, B., Friedel, D., Frieman, J., García-Bellido, J., Gerdes, D. W., Gutierrez, G., Hinton, S. R., Hollowood, D. L., Honscheid, K., James, D. J., Kent, S., Kuehn, K., Lahav, O., Lidman, C., Lima, M., Melchior, P., Mena-Fernández, J., Menanteau, F., Miquel, R., Ogando, R. L. C., Paterno, M., Paz-Chinchón, F., Pieres, A., Malagón, A. A. Plazas, Roodman, A., Sanchez, E., Scarpine, V., Smith, M., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., To, C., Vincenzi, M.

论文摘要

我们提出了来自黑暗能源调查（DES）的前三年（Y3）的Maglim镜头样品红移分布的替代校准。新的校准基于基于自组织图的方案和聚集红移以估计红移分布和固有的不确定性的组合，预计这比透镜样品的原始DES Y3红移校准更准确。我们详细描述了方法，我们将其验证在模拟中，并讨论主导我们的错误预算的主要影响。新的校准与基准的DES Y3红移分布校准相当一致，仅在分布的均值和宽度上有轻微的差异（$ <3σ$）。我们研究了这种新校准对宇宙学约束的影响，分析了DES Y3 Galaxy聚类和星系 - 果胶镜头测量值，假设有$λ$ CDM宇宙学。我们获得$ω_ {\ rm m} = 0.30 \ pm 0.04 $，$σ_8= 0.81 \ pm 0.07 $和$ s_8 = 0.81 \ pm 0.04 $，这意味着$ \ sim0.4σ$换档的$ω__{\ rm} -s_8 $ shighlipt yift yift fortift yift yftifts yfteriftion yftiftiftion y。多探针宇宙学分析中晶状体样品的校准。

We present an alternative calibration of the MagLim lens sample redshift distributions from the Dark Energy Survey (DES) first three years of data (Y3). The new calibration is based on a combination of a Self-Organising Maps based scheme and clustering redshifts to estimate redshift distributions and inherent uncertainties, which is expected to be more accurate than the original DES Y3 redshift calibration of the lens sample. We describe in detail the methodology, we validate it on simulations and discuss the main effects dominating our error budget. The new calibration is in fair agreement with the fiducial DES Y3 redshift distributions calibration, with only mild differences ($<3σ$) in the means and widths of the distributions. We study the impact of this new calibration on cosmological constraints, analysing DES Y3 galaxy clustering and galaxy-galaxy lensing measurements, assuming a $Λ$CDM cosmology. We obtain $Ω_{\rm m} = 0.30\pm 0.04$, $σ_8 = 0.81\pm 0.07 $ and $S_8 = 0.81\pm 0.04$, which implies a $\sim 0.4σ$ shift in the $Ω_{\rm}-S_8$ plane compared to the fiducial DES Y3 results, highlighting the importance of the redshift calibration of the lens sample in multi-probe cosmological analyses.

下载PDF全文

下载文献需遵守相关版权规定

论文标题