来自完整暗能量调查多个探针的动态暗能量约束
宇宙学与河外天体物理
2026-05-27 v1
摘要
我们在假设时间依赖方程状态 的情况下, 从生长探针和几何探针使用完整六年暗能量调查数据集: Ia 型超新星、类星体声波振荡, 以及弱引力透镜和星系聚类(32pt)。该组合得到 和 , 目前自单个调查获得的最紧密约束, 其与宇宙常数的偏离达 。加入 DESI DR2 BAO 数据后得到 和 , 代表截至目前最严格的低红移-only 测试, 其 偏离。在该组合中, 加入 32pt 将约束能力翻倍。最终, 当与首要 CMB 信息联合时, 我们获得 , , 其偏离达 。我们发现, 将 32pt 纳入之前研究的 SN + DESI BAO + CMB 组合, 显著性基本不变( 到 ), 但图谱优势提升约 。我们系统性地调查了每个探针被省略时的影响, 发现宇宙常数的偏离显著性范围为 到 , 最佳拟合参数始终位于 和 区域。排除 Ia 型超新星后, 所有数据组合的 CDM 偏离为 , 提供了一个独立于超新星光度校准的交叉检验。这些结果支持了由数个近期宇宙学分析报告的演化暗能量的弱偏好。通过将生长探针和几何探针从单个调查中联合起来, 本工作实现了 DES 创始时所设想的多探针暗能量计划。
引用
@article{arxiv.2605.27221,
title = {Constraints on Dynamical Dark Energy from Multiple Probes in the Full Dark Energy Survey},
author = {DES Collaboration and T. M. C. Abbott and M. Adamow and M. Aguena and A. Alarcon and S. Allam and O. Alves and A. Amon and D. Anbajagane and F. Andrade-Oliveira and P. Armstrong and S. Avila 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 D. L. Burke and H. Camacho and G. Camacho-Ciurana and R. Camilleri and G. Campailla and A. Campos and A. Carnero Rosell and A. Carr and J. Carretero and F. J. Castander and R. Cawthon and K. C. Chan and C. Chang and R. Chen and J. M. Coloma-Nadal and C. Conselice 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 D. L. DePoy and J. DeRose and S. Desai 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 S. Everett and A. E. Evrard and I. Ferrero and A. Ferté and B. Flaugher and P. Fosalba and D. Francis de Souza and J. Frieman and L. Galbany and J. García-Bellido and M. Gatti and G. Giannini and P. Giles and K. Glazebrook and D. Gruen and R. A. Gruendl and G. Gutierrez and I. Harrison and W. G. Hartley 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 S. Kent and R. Kessler and A. Kovacs and K. Koyama and E. Krause and R. Kron and K. Kuehn and O. Lahav and J. Lee and S. Lee and E. Legnani and T. S. Li and A. R. Liddle and C. Lidman and H. Lin and M. Lin and N. MacCrann and J. L. Marshall and S. Mau and R. G. McMahon and J. Mena-Fernández and F. Menanteau and R. Miquel and J. J. Mohr and J. Muir and J. Myles and A. Möller and R. C. Nichol and R. L. C. Ogando and W. J. Percival and D. Petravick and A. Pieres and A. A. Plazas Malagón and B. Popovic and A. Porredon and J. Prat and H. Qu and M. Raveri and J. Rebouças 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. S. Rykoff and M. Sako and S. Samuroff and C. Sánchez and E. Sanchez and D. Sanchez Cid and T. Schutt and D. Scolnic and I. Sevilla-Noarbe and N. Shah and P. Shah and E. Sheldon and M. Smith and M. Soares-Santos and E. Suchyta and M. Sullivan and M. E. C. Swanson and B. O. Sánchez and M. Tabbutt and G. Tarle and G. Taylor and D. Thomas and C. To and L. Toribio San Cipriano and M. Toy and M. A. Troxel and D. L. Tucker and V. Vikram and M. Vincenzi and N. Weaverdyck and J. Weller and A. Whyley and R. D. Wilkinson and P. Wiseman and M. Yamamoto and B. Yanny and B. Yin and Y. Zhang and J. Zuntz},
journal= {arXiv preprint arXiv:2605.27221},
year = {2026}
}
备注
10 pages, 3 figures, 2 tables, including Supplemental Material. Submitted to PRL