X-Ray Absorption Associated with High-Velocity UV Absorbers
| dc.creator | Sabra, B. M. | |
| dc.creator | Hamann, F. | |
| dc.creator | Shields, J. C. | |
| dc.creator | George, I. | |
| dc.creator | Jannuzi, B. | |
| dc.date | 2001-05-16 | |
| dc.date.accessioned | 2026-07-25T18:07:53Z | |
| dc.description | We present Chandra observations of two radio-quiet QSOs, PG 2302+029 and PG 1254+047. PG 2302+029 has an ultra high-velocity UV absorption system -56,000 km/s, while PG 1254+047 is a Broad Absorption Line (BAL) QSO with detached troughs. Both objects are X-ray weak, consistent with the known correlation between alpha_ox and the strength of the UV absorption lines. The data suggest that there is evidence that both objects are intrinsically weak X-ray sources, in addition to being heavily X-ray absorbed. The X-ray absorption column densities are N_H > 10^22 cm^-2 for neutral gas and the intrinsic emission spectra have alpha_ox > 2. The data are fit best by including ionized (rather than neutral) absorbers, with column densities N_H(PG2302) > 2.98 x 10^22 cm^-2 and N_H(PG1254) > 17.3 x 10^22 cm^-2. The degrees of ionization are consistent with the UV lines, as are the total column densities if the strongest lines are saturated. | |
| dc.description | to appear in Mass Outflows in Active Galactic Nuclei: New Perspectives, ASP Conf. Series, eds. D. M. Crenshaw, S. B. Kraemer, I. M. George | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0105279 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0105279 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/53785 | |
| dc.subject | Astrophysics | |
| dc.title | X-Ray Absorption Associated with High-Velocity UV Absorbers | |
| dc.type | text |