Lyman-α 林克森林的模拟与观测比较 I. 方法论
摘要
我们描述了将从宇宙模拟中提取的光谱与观测数据进行比较的技术术语，using the same methodology to link Lyman-alpha properties derived from the simulations with properties derived from observational data. The eventual goal is to measure the coherence or clustering properties of Lyman-alpha absorbers using observations of quasar pairs and groups. We quantify the systematic underestimate in opacity that is inherent in the continuum fitting process of observed spectra over a range of resolution and signal-to-noise ratio. We present an automated process for detecting and selecting absorption features over the range of resolution and signal-to-noise of typical observational data on the Lyman-alpha "forest". Using these techniques, we detect coherence over transverse scales out to 500 h^{-1}_{50} kpc in spectra extracted from a cosmological simulation at z = 2.
关键词
引用
@article{arxiv.astro-ph/0110450,
title = {Comparing Simulations and Observations of the Lyman-Alpha Forest I. Methodology},
author = {C. E. Petry and C. D. Impey and N. Katz and D. H. Weinberg and L. E. Hernquist},
journal= {arXiv preprint arXiv:astro-ph/0110450},
year = {2009}
}
备注
52 pages, includes 14 figures, to appear in ApJ v566 Feb 2002