Ionization and Abundances in Intrinsic QSO Absorption-Line Systems
| dc.creator | Hamann, F. | |
| dc.creator | Barlow, T. | |
| dc.creator | Cohen, R. D. | |
| dc.creator | Junkkarinen, V. | |
| dc.creator | Burbidge, E. M. | |
| dc.date | 1997-04-24 | |
| dc.date | 1997-04-28 | |
| dc.date.accessioned | 2026-07-07T09:02:09Z | |
| dc.date.available | 2026-07-07T09:02:09Z | |
| dc.description | We discuss two aspects of the ionization and abundances in QSO intrinsic absorbers. First, we use the high-ionization doublet Ne VIII 770,780 to test the relationship between the UV line absorbers and the ``warm'' absorbers detected in soft X-rays. In one well-measured QSO with intrinsic z_a ~ z_e lines, UM 675, we estimate that the UV absorber has at least 10 times too little O VII and O VIII to produce the requisite bound-free edges at ~0.8 keV. Second, we show that firm lower limits on the metal-to-hydrogen abundances can be established even with no constraints on the ionization. Those lower limits are typically Z ~> Z_o and sometimes Z ~> 10 Z_o (e.g. for the BALs). We argue that QSO metallicities up to at least ~9 Z_o are consistent with the rapid early-epoch star formation expected in the cores of massive galaxies. | |
| dc.description | 6 pages, LaTeX, to appear in ``Mass Ejection From AGN,'' eds. R. Weymann, I. Shlosman, N. Arav | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9704235 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9704235 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/148527 | |
| dc.subject | Astrophysics | |
| dc.title | Ionization and Abundances in Intrinsic QSO Absorption-Line Systems | |
| dc.type | text |