What causes the Ly-alpha forest, clouds or large-scale velocity fields ?
| dc.creator | Kegel, W. H. | |
| dc.creator | Levshakov, S. A. | |
| dc.date | 1997-08-07 | |
| dc.date.accessioned | 2026-07-07T02:23:58Z | |
| dc.date.available | 2026-07-07T02:23:58Z | |
| dc.description | We show that in stochastic large scale velocity fields superposed on the general Hubble flow, the formation of the GP-depression in QSO spectra is intimately related to the formation of the absorption-line structure usually called `Ly-alpha forest'. Therefore the HI-density in the diffuse IGM might be substaintially underestimated if one determines the GP-effect from the apparent continuum in high resolution spectra of QSOs. Our tentative calculations imply a current baryon density Omega_b h^2_{100} = 0.015 which agrees well with the baryon density determination from the deuterium abaundance measurement by Levshakov, Kegel and Takahara (the same volume). | |
| dc.description | 2 pages, 2 Postscript figures, uses conf_iap.sty A contribution to the Proceed. 13th IAP Colloquium "Structure and Evolution of the IGM from QSO Absorption Line Systems" (Paris, July 1-5, 1997) | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9708063 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9708063 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/11454 | |
| dc.subject | Astrophysics | |
| dc.title | What causes the Ly-alpha forest, clouds or large-scale velocity fields ? | |
| dc.type | text |