暗能量巡天第六年结果：来自星系成团和弱引力透镜的宇宙学约束
宇宙学与河外天体物理
2026-01-30 v2
摘要
我们展示了结合暗能量巡天（DES）六年（Y6）观测数据（覆盖约5000平方度）的星系成团和弱引力透镜测量的宇宙学结果。我们使用三种两点相关函数（3×2pt）进行大尺度结构分析：（i）来自1.4亿个源星系形状的宇宙剪切，（ii）来自900万个透镜星系位置的星系成团，以及（iii）来自它们互相关的星系-星系透镜。我们在平坦ΛCDM和wCDM宇宙学中对数据建模。联合分析在ΛCDM中（68%置信水平）得到和物质密度，其中是成团振幅。这些约束显示与来自Planck 2018、ACT-DR6和SPT-3G DR1的宇宙微波背景（CMB）主各向异性数据集组合的（全空间）参数差异为1.8σ。仅投影到时，差异为2.6σ。在wCDM中，Y6 3×2pt结果得到，，以及暗能量状态方程参数。我们首次结合了所有DES暗能量探针：3×2pt、Ia型超新星、重子声学振荡和星系团。在ΛCDM中，这种组合与CMB的参数差异为2.8σ。当将DES 3×2pt与其他低红移数据集（DESI DR2 BAO、DES SNe Ia、SPT星系团）结合时，我们发现与CMB的参数差异为2.3σ。Y6 3×2pt、CMB和这些低红移数据集的联合拟合产生了迄今为止最严格的ΛCDM约束：，，，以及 eV（95%置信水平）。在wCDM中，这种组合得到。
引用
@article{arxiv.2601.14559,
title = {Dark Energy Survey Year 6 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing},
author = {DES Collaboration and T. M. C. Abbott and M. Adamow and M. Aguena and A. Alarcon and S. S. Allam and O. Alves and A. Amon and D. Anbajagane and F. Andrade-Oliveira and S. Avila and D. Bacon and E. J. Baxter and J. Beas-Gonzalez and K. Bechtol and M. R. Becker and G. M. Bernstein and E. Bertin and J. Blazek and S. Bocquet and D. Brooks and D. Brout and H. Camacho and G. Camacho-Ciurana and R. Camilleri and G. Campailla and A. Campos and A. Carnero Rosell and M. Carrasco Kind and J. Carretero and P. Carrilho and F. J. Castander and R. Cawthon and C. Chang and A. Choi and J. M. Coloma-Nadal and M. Costanzi and M. Crocce and W. d'Assignies and L. N. da Costa and M. E. da Silva Pereira and T. M. Davis and J. De Vicente and J. DeRose and H. T. Diehl and S. Dodelson and P. Doel and C. Doux and A. Drlica-Wagner and T. F. Eifler and J. Elvin-Poole and J. Estrada and S. Everett and A. E. Evrard and J. Fang and A. Farahi and A. Ferté and B. Flaugher and P. Fosalba and J. Frieman and J. García-Bellido and M. Gatti and E. Gaztanaga and G. Giannini and P. Giles and K. Glazebrook and M. Gorsuch and D. Gruen and R. A. Gruendl and J. Gschwend and G. Gutierrez and I. Harrison and W. G. Hartley and E. Henning and K. Herner and S. R. Hinton and D. L. Hollowood and K. Honscheid and E. M. Huff and D. Huterer and B. Jain and D. J. James and M. Jarvis and N. Jeffrey and T. Jeltema and T. Kacprzak and S. Kent and A. Kovacs and E. Krause and R. Kron and K. Kuehn and O. Lahav and S. Lee and E. Legnani and C. Lidman and H. Lin and N. MacCrann and M. Manera and T. Manning and J. L. Marshall and S. Mau and J. McCullough and J. Mena-Fernández and F. Menanteau and R. Miquel and J. J. Mohr and J. Muir and J. Myles and R. C. Nichol and B. Nord and J. H. O'Donnell and R. L. C. Ogando and A. Palmese and M. Paterno and J. Peoples and W. J. Percival and D. Petravick and A. Pieres and A. A. Plazas Malagón and A. Porredon and A. Pourtsidou and J. Prat and C. Preston and M. Raveri and W. Riquelme and M. Rodriguez-Monroy and P. Rogozenski and A. K. Romer and A. Roodman and R. Rosenfeld and A. J. Ross and E. Rozo and E. S. Rykoff and S. Samuroff and C. Sánchez and E. Sanchez and D. Sanchez Cid and T. Schutt and I. Sevilla-Noarbe and E. Sheldon and N. Sherman and T. Shin and M. Smith and M. Soares-Santos and E. Suchyta and M. E. C. Swanson and M. Tabbutt and G. Tarle and D. Thomas and C. To and A. Tong and L. Toribio San Cipriano and M. A. Troxel and M. Tsedrik and D. L. Tucker and V. Vikram and A. R. Walker and N. Weaverdyck and R. H. Wechsler and D. H. Weinberg and J. Weller and V. Wetzell and A. Whyley and R. D. Wilkinson and P. Wiseman and H. -Y. Wu and M. Yamamoto and B. Yanny and B. Yin and G. Zacharegkas and Y. Zhang and J. Zuntz},
journal= {arXiv preprint arXiv:2601.14559},
year = {2026}
}
备注
See https://www.darkenergysurvey.org/des-y6-cosmology-results-papers/ for the full DES Y6 3x2pt cosmology release. Version with minor typos fixed