来自DESI第一年类星体样本的CMB透镜与Lyα森林交叉双谱
宇宙学与河外天体物理
2024-05-27 v1
摘要
宇宙微波背景中的引力透镜与一维Lyα森林功率谱之间的挤压交叉双谱可以约束偏差参数并打破σ8与其他宇宙学参数之间的简并。我们使用Planck PR3透镜图和来自暗能量光谱仪器第一年数据的超过28万个类星体光谱，在有效红移z_eff=2.4处以4.8σ的显著性检测到了该交叉双谱。我们通过去投影热Sunyaev-Zeldovich效应，测试了我们的测量结果对金属污染和前景（如银河系消光和星系团）的稳健性。我们将结果与树级微扰理论计算进行比较，发现模型与测量之间存在合理的一致性。
引用
@article{arxiv.2405.14988,
title = {CMB lensing and Ly\alpha\ forest cross bispectrum from DESI's first-year quasar sample},
author = {N. G. Karaçaylı and P. Martini and D. H. Weinberg and S. Ferraro and R. de Belsunce and J. Aguilar and S. Ahlen and E. Armengaud and D. Brooks and T. Claybaugh and A. de la Macorra and B. Dey and P. Doel and K. Fanning and J. E. Forero-Romero and S. Gontcho A Gontcho and A. X. Gonzalez-Morales and G. Gutierrez and J. Guy and K. Honscheid and D. Kirkby and T. Kisner and A. Kremin and A. Lambert and M. Landriau and L. Le Guillou and M. E. Levi and M. Manera and A. Meisner and R. Miquel and E. Mueller and A. Muñoz-Gutiérrez and A. D. Myers and J. A. Newman and J. Nie and G. Niz and N. Palanque-Delabrouille and W. J. Percival and C. Poppett and F. Prada and C. Ravoux and M. Rezaie and A. J. Ross and G. Rossi and E. Sanchez and E. F. Schlafly and D. Schlegel and H. Seo and D. Sprayberry and T. Tan and G. Tarlé and B. A. Weaver and H. Zou},
journal= {arXiv preprint arXiv:2405.14988},
year = {2024}
}
备注
13 pages excluding references, 8 figures