暗能量巡天第六年结果：星系-星系引力透镜效应
宇宙学与河外天体物理
2026-01-22 v1
摘要
我们展示了来自暗能量巡天（DES Y6）完整六年数据的星系-星系引力透镜（GGL）测量结果，覆盖了的面积，并用于DES Y6 点宇宙学分析。我们使用了MagLim++透镜样本，包含约900万个星系，分为六个红移区间；以及Metadetection源星表，包含约1.4亿个星系，分为四个红移区间。平均切向剪切信号的总信噪比（S/N）达到173，相比DES Y3提高了17%。在应用宇宙学分析中使用的尺度截断后，对于线性（非线性）星系偏差模型，（），信噪比降至75（90）。一套全面的验证测试表明，在DES Y6分析所需的统计精度下，该测量对观测和天体物理系统误差具有鲁棒性。尽管未用于主要的宇宙学分析，我们从较小角尺度上的星系-星系引力透镜信号中提取了高信噪比的几何剪切比测量。这些测量为点分析中使用的测光红移分布和剪切校准提供了内部一致性检验。
引用
@article{arxiv.2601.15175,
title = {Dark Energy Survey Year 6 Results: Galaxy-galaxy lensing},
author = {G. Giannini and G. Camacho-Ciurana and A. Whyley and J. Prat and J. Blazek and C. Sánchez and G. Zacharegkas and A. Alarcon and E. Legnani and A. Amon and D. Anbajagane and S. Avila and K. Bechtol and M. R. Becker and G. M. Bernstein and S. Bocquet and A. Campos and A. Carnero Rosell and R. Cawthon and C. Chang and M. Crocce and W. d'Assignies and J. De Vicente and A. Drlica-Wagner and S. Elvin-Poole and A. Ferté and M. Gatti and D. Gruen and M. Jarvis and M. Manera and S. Mau and J. McCullough and F. Menanteau and J. Myles and A. Porredon and M. Rodriguez-Monroy and A. Roodman and E. S. Rykoff and S. Samuroff and D. Sanchez Cid and I. Sevilla-Noarbe and T. Schutt and M. A. Troxel and N. Weaverdyck and M. Yamamoto and B. Yin and T. M. C. Abbott and M. Aguena and S. Allam and O. Alves and F. Andrade-Oliveira and D. Bacon and E. Bertin and D. Brooks and H. Camacho and J. Carretero and L. N. da Costa and M. E. da Silva Pereira and T. M. Davis and D. L. DePoy and S. Desai and H. T. Diehl and P. Doel and C. Doux and T. F. Eifler and S. Everett and A. E. Evrard and P. Fosalba and J. Frieman and J. García-Bellido and E. Gaztanaga and P. Giles and K. Glazebrook and I. Harrison and W. G. Hartley and K. Herner and S. R. Hinton and D. L. Hollowood and K. Honscheid and D. Huterer and B. Jain and D. J. James and N. Jeffrey and T. Kacprzak and S. Kent and E. Krause and O. Lahav and S. Lee and J. L. Marshall and J. Mena-Fernández and R. Miquel and J. J. Mohr and J. Muir and R. C. Nichol and R. L. C. Ogando and A. Palmese and M. Paterno and W. J. Percival and D. Petravick and A. A. Plazas Malagón and M. Raveri and R. Rosenfeld and E. Sanchez and E. Sheldon and T. Shin and J. Allyn. Smith and M. Smith and M. Soares-Santos and E. Suchyta and M. E. C. Swanson and G. Tarle and D. Thomas and C. To and D. L. Tucker and V. Vikram and M. Vincenzi and A. R. Walker and P. Wiseman and B. Yanny},
journal= {arXiv preprint arXiv:2601.15175},
year = {2026}
}