Detecting the non-Gaussian Spectrum of QSO's Ly$α$ Absorption Line Distribution
| dc.creator | Pando, Jesus | |
| dc.creator | Fang, Li-Zhi | |
| dc.date | 1998-10-03 | |
| dc.date.accessioned | 2026-07-07T02:28:12Z | |
| dc.date.available | 2026-07-07T02:28:12Z | |
| dc.description | We present an analysis of the non-Gaussianity in the distribution of Ly$α$ forest lines in the QSO absorption spectra. Statistical tests performed on this data indicate that there may be large scale structure even though the power spectrum of the Ly$α$ line distribution on large scales is found to be flat. It is apparent that higher (than two) order statistics are crucial in quantifying the clustering behavior of Ly$α$ clouds. Using the discrete wavelet on three independent data sets of Ly$α$ forests, we find that the distribution of Ly$α$ forests does show non-Gaussian behavior on scales from 5 to 10 h$^{-1}$ Mpc with confidence level larger than 95%. Two data sets available on large scales are found to be non-Gaussian on even larger scales. These techniques are effective in discriminating among models of the Ly$α$ forest formation, which are degenerate at second and lower order statistics (abridged). | |
| dc.description | Accepted by A&A | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9810049 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9810049 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/13021 | |
| dc.subject | Astrophysics | |
| dc.title | Detecting the non-Gaussian Spectrum of QSO's Ly$α$ Absorption Line Distribution | |
| dc.type | text |