连续光谱拟合对Lyman-α林区相关性的影响
宇宙学与河外天体物理
2025-10-21 v3
摘要
Lyman-α林区的通量波动相关性已由Baryonic Acoustic Oscillation Spectroscopy Survey(BOSS)和Dark Energy Spectroscopy Instrument(DESI) survey观察到，其中揭示了质子声波振荡(BAO)的效应。为了将相关函数拟合到物理模型中以约束宇宙参数，必须考虑将观测光谱拟合到关于其波动被测量的模板之间的效应。在本文中，我们使用模拟光谱测试distortion matrix技术，该技术自BOSS数据发布后一直被用于适当扭曲模型。我们表明，尽管可能存在对导出的林区偏置参数的百分比级效应，但该技术工作得足够好，以至于在百分比水平上不影响BAO峰位置的确定。我们介绍了DESI所使用技术的修改，该技术在原始应用中未出现，并进一步建议了改进的可能性。
引用
@article{arxiv.2506.15262,
title = {The effects of continuum fitting on Lyman-$\alpha$ forest correlations},
author = {Nicolas Busca and James Rich and Julian Bautista and Andrei Cuceu and Andreu Font-Ribera and Julien Guy and Hiram K. Herrera-Alcantar and Julianna Stermer and Christophe Balland and J. Aguilar and S. Ahlen and D. Bianchi and D. Brooks and T. Claybaugh and A. de la Macorra and P. Doel and S. Ferraro and J. E. Forero-Romero and E. Gaztañaga and C. Gordon and G. Gutierrez and M. Ishak and R. Kehoe and D. Kirkby and A. Kremin and M. Landriau and L. Le Guillou and C. Magneville and P. Martini and R. Miquel and S. Nadathur and N. Palanque-Delabrouille and F. Prada and I. Pérez-Ràfols and C. Ravoux and G. Rossi and E. Sanchez and D. Schlegel and H. Seo and J. Silber and D. Sprayberry and G. Tarlé and B. A. Weaver and R. Zhou and H. Zou},
journal= {arXiv preprint arXiv:2506.15262},
year = {2025}
}
备注
accepted for JCAP