从 DESI 早期数据中对 BAO 信号的首次探测
宇宙学与河外天体物理
2025-08-11 v2
摘要
我们展示了使用第四阶段地基暗能量光谱仪（DESI）运行初始两个月期间收集的解盲数据所获得的重子声学振荡（BAO）信号的首次探测。从选取的 261,291 个亮红星系样本中（红移区间 0.4 < z < 1.1，覆盖 1651 平方度，完备度 57.9%），我们报告了约 5 西格玛水平的 BAO 探测，并以 1.7% 的精度测量了 BAO 位置。使用红移范围 0.1 < z < 0.5 内 109,523 个星系的亮星系样本（覆盖 3677 平方度，完备度 50.0%），我们也以约 3 西格玛显著性、2.6% 的精度探测到 BAO 特征。这些首批 BAO 测量代表了一个重要里程碑，充当复杂的机器人驱动光纤馈入 DESI 光谱仪最优性能的质量控制，也是对 DESI 光谱管线与数据管理系统的早期验证。基于这些初步有前景的结果，我们预测 DESI 有望在完成五年巡天数据后以亚百分精度实现高显著性 BAO 探测，满足 BAO 测量的顶层科学要求。这一极高精度将树立宇宙学新标准，并确认 DESI 为本十年剩余时间内最具竞争力的 BAO 实验。
引用
@article{arxiv.2304.08427,
title = {First Detection of the BAO Signal from Early DESI Data},
author = {Jeongin Moon and David Valcin and Michael Rashkovetskyi and Christoph Saulder and Jessica Nicole Aguilar and Steven Ahlen and Shadab Alam and Stephen Bailey and Charles Baltay and Robert Blum and David Brooks and Etienne Burtin and Edmond Chaussidon and Kyle Dawson and Axel de la Macorra and Arnaud de Mattia and Govinda Dhungana and Daniel Eisenstein and Brenna Flaugher and Andreu Font-Ribera and Jaime E. Forero-Romero and Cristhian Garcia-Quintero and Satya Gontcho A Gontcho and Julien Guy and Malik Muhammad Sikandar Hanif and Klaus Honscheid and Mustapha Ishak and Robert Kehoe and Sumi Kim and Theodore Kisner and Anthony Kremin and Martin Landriau and Laurent Le Guillou and Michael Levi and Marc Manera and Paul Martini and Patrick McDonald and Aaron Meisner and Ramon Miquel and John Moustakas and Adam Myers and Seshadri Nadathur and Richard Neveux and Jeffrey A. Newman and Jundan Nie and Nikhil Padmanabhan and Nathalie Palanque-Delabrouille and Will Percival and Alejandro Pérez Fernández and Claire Poppett and Francisco Prada and Anand Raichoor and Ashley J. Ross and Graziano Rossi and Lado Samushia and David Schlegel and Hee-Jong Seo and Gregory Tarlé and Mariana Vargas Magana and Andrei Variu and Benjamin Alan Weaver and Martin J. White and Christophe Yèche and Sihan Yuan and Cheng Zhao and Rongpu Zhou and Zhimin Zhou and Hu Zou},
journal= {arXiv preprint arXiv:2304.08427},
year = {2025}
}
备注
17 pages, 10 figures, 4 tables. MNRAS, 525, 5406. Author accepted manuscript matching the published version