贝叶斯成分分离用于 DESI LAE 自动光谱红移与光度目标
天体物理仪器与方法
2026-03-26 v2 宇宙学与河外天体物理
应用统计
摘要
液旋亚尼发射体 (LAE) 是重要的高红移宇宙学探针,传统上通过专用窄带光度调查法进行识别。在地面光谱观测中,区分自动方法下锐利的LAE峰与剩余天空发射线具有困难,导致红移误分类。我们提出一种贝叶斯光谱成分分离技术,用于自动确定LAE的光谱红移,并对天空残差进行边际化处理。我们利用采用暗能量光谱仪器 (DESI) 获得的经视觉检查的LAE光谱,构建数据驱动的先验分布,可通过联合推断每个单个光谱的天空残差、LAE成分及残差成分来确定红移。我们对881个光谱观测得到的 范围内的 DESI LAE 候选光谱进行测试,验证后显示该方法在确定红移时准确率超过90%。以我们管线的 值为检测置信度的代理指标,我们进一步探讨了潜在的调查设计选择及其对利用中带光度进行LAE目标选择的含义。该方法在确定DESI光谱红移方面具有可扩展性和准确性,结果为LAE目标选择提供了建议,为未来高红移光谱调查做好准备。
引用
@article{arxiv.2504.06870,
title = {Bayesian Component Separation for DESI LAE Automated Spectroscopic Redshifts and Photometric Targeting},
author = {Ana Sofía M. Uzsoy and Andrew K. Saydjari and Arjun Dey and Anand Raichoor and Douglas P. Finkbeiner and Eric Gawiser and Kyoung-Soo Lee and Steven Ahlen and Davide Bianchi and David Brooks and Todd Claybaugh and Andrei Cuceu and Axel de la Macorra and Peter Doel and Andreu Font-Ribera and Jaime E. Forero-Romero and Enrique Gaztañaga and Satya Gontcho A Gontcho and Gaston Gutierrez and Mustapha Ishak and Robert Kehoe and David Kirkby and Anthony Kremin and Martin Landriau and Laurent Le Guillou and Aaron Meisner and Ramon Miquel and John Moustakas and Nathalie Palanque-Delabrouille and Francisco Prada and Ignasi Pérez-Ràfols and Graziano Rossi and Eusebio Sanchez and David Schlegel and Michael Schubnell and Hee-Jong Seo and David Sprayberry and Gregory Tarlé and Benjamin Alan Weaver and Hu Zou},
journal= {arXiv preprint arXiv:2504.06870},
year = {2026}
}
备注
20 pages, 11 figures