利用合成数据集验证 DESI DR2 的 Lyα BAO 分析
天体物理仪器与方法
2025-03-25 v1 宇宙学与河外天体物理
摘要
暗能量光谱仪器（DESI）的第二版数据发布（DR2）包含前三年的观测数据，其 Lyα 森林光谱数量是 DR1 的两倍，提供了同类数据中最大的数据集。为确保基于 Lyα 森林的 Baryonic Acoustic Oscillation（重子声波振荡，BAO）分析的稳健验证，我们在 DR1 的模拟数据和分析框架基础上进行了重大更新。特别是，我们提出了 CoLoRe-QL，这是一套新的 Lyα 模拟数据集，使用准线性输入功率谱来纳入 BAO 峰值的非线性展宽。我们还将验证中使用的模拟次数从 DR1 的 150 次增加到 400 次。最后，我们详细研究了类星体红移误差对 BAO 测量的影响，并比较了在光谱中屏蔽 Damped Lyman-α Absorbers（阻尼 Lyα 吸收体，DLAs）的不同策略。DESI DR2 的 Lyα 数据集的 BAO 测量结果在配套出版物中给出。
引用
@article{arxiv.2503.14741,
title = {Validation of the DESI DR2 Ly$\alpha$ BAO analysis using synthetic datasets},
author = {L. Casas and H. K. Herrera-Alcantar and J. Chaves-Montero and A. Cuceu and A. Font-Ribera and M. Lokken and M. Abdul-Karim and C. Ramírez-Pérez and J. Aguilar and S. Ahlen and U. Andrade and E. Armengaud and A. Aviles and S. Bailey and S. BenZvi and D. Bianchi and A. Brodzeller and D. Brooks and R. Canning and A. Carnero Rosell and M. Charles and E. Chaussidon and T. Claybaugh and K. S. Dawson and A. de la Macorra and A. de Mattia and Arjun Dey and Biprateep Dey and Z. Ding and P. Doel and D. J. Eisenstein and W. Elbers and S. Ferraro and J. E. Forero-Romero and C. Garcia-Quintero and Lehman H. Garrison and E. Gaztañaga and H. Gil-Marín and S. Gontcho A Gontcho and A. X. Gonzalez-Morales and C. Gordon and G. Gutierrez and J. Guy and M. Herbold and K. Honscheid and C. Howlett and D. Huterer and M. Ishak and S. Juneau and R. Kehoe and D. Kirkby and T. Kisner and A. Kremin and O. Lahav and M. Landriau and J. M. Le Goff and L. Le Guillou and A. Leauthaud and M. E. Levi and Q. Li and M. Manera and P. Martini and A. Meisner and J. Mena-Fernández and R. Miquel and J. Moustakas and D. Muñoz Santos and A. D. Myers and S. Nadathur and L. Napolitano and G. Niz and H. E. Noriega and E. Paillas and N. Palanque-Delabrouille and W. J. Percival and Matthew M. Pieri and C. Poppett and F. Prada and I. Pérez-Ràfols and C. Ravoux and G. Rossi and E. Sanchez and D. Schlegel and M. Schubnell and H. Seo and F. Sinigaglia and D. Sprayberry and T. Tan and G. Tarlé and P. Taylor and W. Turner and M. Vargas-Magaña and M. Walther and B. A. Weaver and M. Wolfson and C. Yèche and P. Zarrouk and R. Zhou},
journal= {arXiv preprint arXiv:2503.14741},
year = {2025}
}
备注
This DESI Collaboration Publication is part of the Data Release 2 publication series (see https://data.desi.lbl.gov/doc/papers)