Structure in the Lyman-Alpha Forest
| dc.creator | Liske, J. | |
| dc.creator | Webb, J. K. | |
| dc.date | 1997-09-10 | |
| dc.date.accessioned | 2026-07-07T02:24:10Z | |
| dc.date.available | 2026-07-07T02:24:10Z | |
| dc.description | The spatial distribution of Ly-alpha forest absorption systems toward a group of 8, closely spaced QSOs has been analysed and evidence for large scale structure has been found at <z> = 2.8. Our technique is based on the first and second moments of the transmission probability density function which is capable of identifying and assessing the significance of regions of over- or underdense Ly-alpha absorption. The data has revealed at least two interesting features. 1. An overdense structure at z = 2.27 which extends at least over ~8 h^{-1} comoving Mpc (q_0 = 0.5) in the plane of the sky. Metal absorption lines have been found at the same redshift and thus a cluster or proto-cluster of galaxies seems to have been discovered. 2. A void at z = 2.97, extending over ~20 h^{-1} comoving Mpc in the plane of the sky, possibly caused by a locally increased UV ionising flux due to a foreground QSO. | |
| dc.description | 2 pages, LaTeX, with 1 PostScript figure, colour version available at ftp://edwin.phys.unsw.edu.au/pub/jol/struc_lya.fig1_col.ps.gz, uses conf_iap.sty (included). To appear in the Proceedings of the 13th IAP Colloquium (July 1-5, 1997): ``Structure and Evolution of the IGM from QSO Absorption Line Systems'' | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9709081 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9709081 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/11520 | |
| dc.subject | Astrophysics | |
| dc.title | Structure in the Lyman-Alpha Forest | |
| dc.type | text |