基于 DESI DR1 原宇宙非高斯性与 Planck PR4 CMB 透镜约束原初非高斯性
宇宙学与河外天体物理
2026-04-17 v2
摘要
我们报告了首次利用暗能量光谱仪器第一个数据发布 (DR1) 中 120 万个光谱确认的类星体与 Planck PR4 CMB 透镜重建进行原初非高斯性 local-type 测量的工作。该分析在覆盖 的三个时空红移箱中进行,覆盖约 20% 的天空比例。我们采用基于目录的伪 估计器,并在无噪声模拟上验证了线性图像权重。与基于光度类星体样本的以前分析相比,我们的结果受益于 DESI 光谱样本的高纯度、PR4 透镜的降低噪声以及光谱类星体自相关中无超大尺度功率的缺失。拟合同时求解每个红移箱中的非高斯性参数 和线性偏置�幅,我们获得 (对应响应参数 ),以及 (对应 )。这些结果比基于 Legacy Imaging Survey DR9 的以前分析将 的约束提高了约 35%。此外,我们推导出一种最优加权方案以最大化约束能力。按此方案计算(假设 ),我们获得 。我们的结果表明 DESI 类星体在探测原初气动物理方面具有统计力量,并凸显了未来 DESI 数据发布的前景。
引用
@article{arxiv.2512.17865,
title = {Constraining primordial non-Gaussianity from DESI DR1 quasars and Planck PR4 CMB Lensing},
author = {Sofia Chiarenza and Alex Krolewski and Marco Bonici and Edmond Chaussidon and Roger de Belsunce and Will Percival and Jessica Nicole Aguilar and Steven Ahlen and Anton Baleato Lizancos and Davide Bianchi and David Brooks and Todd Claybaugh and Andrei Cuceu and Kyle Dawson and Axel de la Macorra and Peter Doel and Simone Ferraro and Andreu Font-Ribera and Jaime E. Forero-Romero and Enrique Gaztañaga and Satya Gontcho A Gontcho and Gaston Gutierrez and Hiram K. Herrera-Alcantar and Klaus Honscheid and Dragan Huterer and Mustapha Ishak and Dick Joyce and David Kirkby and Anthony Kremin and Ofer Lahav and Claire Lamman and Martin Landriau and Laurent Le Guillou and Michael Levi and Marc Manera and Paul Martini and Aaron Meisner and Ramon Miquel and Seshadri Nadathur and Jeffrey A. Newman and Gustavo Niz and Nathalie Palanque-Delabrouille and Claire Poppett and Francisco Prada and Ignasi Pérez-Ràfols and Graziano Rossi and Eusebio Sanchez and David Schlegel and Michael Schubnell and Hee-Jong Seo and Joseph Harry Silber and David Sprayberry and Gregory Tarlé and Benjamin Alan Weaver and Christophe Yèche and Rongpu Zhou and Hu Zou},
journal= {arXiv preprint arXiv:2512.17865},
year = {2026}
}
备注
42 pages, 17 figures, 11 tables. Comments are welcome