Nature of the background ultraviolet radiation field at high redshifts |
| |
| Authors: | Archana Samantaray Pushpa Khare |
| |
| Institution: | (1) Physics Department, Utkal University, 751 004 Bhubaneswar, India |
| |
| Abstract: | We have tried to determine the flux of the ultraviolet background radiation field from the column density ratios of various
ions in several absorption systems observed in the spectra of QSOs. We find that in most cases the flux is considerably higher
than what has been estimated to be contributed by the AGNs. The excess flux could originate locally in hot stars. In a few
cases we have been able to show that such galactic flux can only contribute a part of the total required flux. The results
suggest that the background gets a significant contribution from an unseen QSO population. |
| |
| Keywords: | Quasars: absorption lines diffuse radiation |
| 本文献已被 SpringerLink 等数据库收录！ |
