DESI 2024 III：来自星系和类星体的重子声学振荡
摘要
我们使用 0.1<z<2.1 范围内超过 570 万个独特的星系和类星体红移，展示了 DESI 2024 星系和类星体重子声学振荡 (BAO) 测量结果。按示踪天体类型划分，我们使用了来自极限星等亮星系巡天的 300,017 个星系 (0.1<z<0.4)、2,138,600 个亮红星系 (0.4<z<1.1)、2,432,022 个发射线星系 (0.8<z<1.6) 以及 856,652 个类星体 (0.8<z<2.1)，覆盖约 7,500 平方度的天区。分析在星表层级进行了盲化，以避免确认偏差。BAO 拟合和重构方法的所有基准选择以及系统误差的大小，都是基于模拟星表和盲化数据星表的测试确定的。我们提出了对 BAO 分析流水线的几项改进，包括在更具物理动机的方向上增强 BAO 拟合和重构方法，并展示了使用示踪天体组合的结果。我们应用改进后的 DESI 方法对 SDSS BOSS 和 eBOSS 结果进行了重新分析，发现其离散程度与所引用的 SDSS 理论系统不确定性水平一致。在总有效巡天体积约为 18 Gpc 的情况下，六个不同红移区间 BAO 测量的综合精度约为 0.52%，比仅使用第一年数据的前 SOTA 结果提高了 1.2 倍。我们在所有六个红移区间中都探测到了 BAO。BAO 探测的最高显著性在有效红移 0.93 处达到 ，对 BAO 尺度的约束为 0.86%。我们发现我们的测量值在 z<0.8 时系统性地大于 Planck-2018 LCDM 模型的预测。我们将结果转化为横向共动距离和径向 Hubble 距离测量值，这些测量值用于在我们的姊妹论文中约束宇宙学模型 [摘录]。
引用
@article{arxiv.2404.03000,
title = {DESI 2024 III: Baryon Acoustic Oscillations from Galaxies and Quasars},
author = {DESI Collaboration and A. G. Adame and J. Aguilar and S. Ahlen and S. Alam and D. M. Alexander and M. Alvarez and O. Alves and A. Anand and U. Andrade and E. Armengaud and S. Avila and A. Aviles and H. Awan and S. Bailey and C. Baltay and A. Bault and J. Behera and S. BenZvi and F. Beutler and D. Bianchi and C. Blake and R. Blum and S. Brieden and A. Brodzeller and D. Brooks and E. Buckley-Geer and E. Burtin and R. Calderon and R. Canning and A. Carnero Rosell and R. Cereskaite and J. L. Cervantes-Cota and S. Chabanier and E. Chaussidon and J. Chaves-Montero and S. Chen and X. Chen and T. Claybaugh and S. Cole and A. Cuceu and T. M. Davis and K. Dawson and A. de la Macorra and A. de Mattia and N. Deiosso and A. Dey and B. Dey and Z. Ding and P. Doel and J. Edelstein and S. Eftekharzadeh and D. J. Eisenstein and A. Elliott and P. Fagrelius and K. Fanning and S. Ferraro and J. Ereza and N. Findlay and B. Flaugher and A. Font-Ribera and D. Forero-Sánchez and J. E. Forero-Romero and C. Garcia-Quintero and E. Gaztañaga and H. Gil-Marín and S. Gontcho A Gontcho and A. X. Gonzalez-Morales and V. Gonzalez-Perez and C. Gordon and D. Green and D. Gruen and R. Gsponer and G. Gutierrez and J. Guy and B. Hadzhiyska and C. Hahn and M. M. S Hanif and H. K. Herrera-Alcantar and K. Honscheid and C. Howlett and D. Huterer and V. Iršič and M. Ishak and S. Juneau and N. G. Karaçaylı and R. Kehoe and S. Kent and D. Kirkby and A. Kremin and A. Krolewski and Y. Lai and T. -W. Lan and M. Landriau and D. Lang and J. Lasker and J. M. Le Goff and L. Le Guillou and A. Leauthaud and M. E. Levi and T. S. Li and E. Linder and K. Lodha and C. Magneville and M. Manera and D. Margala and P. Martini and M. Maus and P. McDonald and L. Medina-Varela and A. Meisner and J. Mena-Fernández and R. Miquel and J. Moon and S. Moore and J. Moustakas and N. Mudur and E. Mueller and A. Muñoz-Gutiérrez and A. D. Myers and S. Nadathur and L. Napolitano and R. Neveux and J. A. Newman and N. M. Nguyen and J. Nie and G. Niz and H. E. Noriega and N. Padmanabhan and E. Paillas and N. Palanque-Delabrouille and J. Pan and S. Penmetsa and W. J. Percival and M. Pieri and M. Pinon and C. Poppett and A. Porredon and F. Prada and A. Pérez-Fernández and I. Pérez-Ràfols and D. Rabinowitz and A. Raichoor and C. Ramírez-Pérez and S. Ramirez-Solano and M. Rashkovetskyi and M. Rezaie and J. Rich and A. Rocher and C. Rockosi and N. A. Roe and A. Rosado-Marin and A. J. Ross and G. Rossi and R. Ruggeri and V. Ruhlmann-Kleider and L. Samushia and E. Sanchez and C. Saulder and E. F. Schlafly and D. Schlegel and M. Schubnell and H. Seo and R. Sharples and J. Silber and A. Slosar and A. Smith and D. Sprayberry and J. Swanson and T. Tan and G. Tarlé and S. Trusov and R. Vaisakh and D. Valcin and F. Valdes and M. Vargas-Magaña and L. Verde and M. Walther and B. Wang and M. S. Wang and B. A. Weaver and N. Weaverdyck and R. H. Wechsler and D. H. Weinberg and M. White and J. Yu and Y. Yu and S. Yuan and C. Yèche and E. A. Zaborowski and P. Zarrouk and H. Zhang and C. Zhao and R. Zhao and R. Zhou and H. Zou},
journal= {arXiv preprint arXiv:2404.03000},
year = {2025}
}
备注
This DESI Collaboration Key Publication is part of the 2024 publication series using the first year of observations (see https://data.desi.lbl.gov/doc/papers)